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_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:30,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:30,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:30,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:30,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:30,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:30,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:30,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:30,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:30,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:30,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:30,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:30,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:30,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:30,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:30,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:30,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:30,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:30,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:30,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:30,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:30,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:30,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:30,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:30,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:30,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:30,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:30,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:30,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:30,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:30,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:30,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:30,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:30,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:30,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:30,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:30,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:30,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:30,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:30,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:30,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:30,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:30,925 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:30,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:30,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:30,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:30,927 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:30,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:30,928 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:30,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:30,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:30,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:30,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:30,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:30,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:30,929 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:30,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:30,930 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:30,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:30,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:30,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:30,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:30,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:30,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:30,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:30,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:30,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:30,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:30,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:30,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:30,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:31,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:31,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:31,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:31,302 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:31,302 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:31,303 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-13 21:08:31,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f728c8b1/881581ccfbc94d10bc2ac21af1055e96/FLAGb685b3909 [2019-10-13 21:08:32,038 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:32,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-13 21:08:32,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f728c8b1/881581ccfbc94d10bc2ac21af1055e96/FLAGb685b3909 [2019-10-13 21:08:32,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f728c8b1/881581ccfbc94d10bc2ac21af1055e96 [2019-10-13 21:08:32,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:32,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:32,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:32,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:32,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:32,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:32" (1/1) ... [2019-10-13 21:08:32,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:32, skipping insertion in model container [2019-10-13 21:08:32,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:32" (1/1) ... [2019-10-13 21:08:32,247 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:32,331 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:33,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:33,079 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:33,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:33,320 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:33,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33 WrapperNode [2019-10-13 21:08:33,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:33,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:33,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:33,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:33,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... [2019-10-13 21:08:33,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:33,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:33,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:33,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:33,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:33,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:33,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:33,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:33,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:33,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:33,618 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:33,618 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:33,618 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:33,618 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:33,619 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:08:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:08:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:08:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:08:33,623 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:33,623 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:33,623 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:33,623 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:33,623 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:33,624 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:33,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:33,626 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:33,626 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:33,626 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:33,626 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:33,627 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:33,627 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:33,627 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:33,627 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:33,627 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:33,630 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:08:33,639 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:08:33,640 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:33,640 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:33,640 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:33,640 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:33,640 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:33,641 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:36,305 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:36,305 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:36,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:36 BoogieIcfgContainer [2019-10-13 21:08:36,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:36,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:36,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:36,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:36,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:32" (1/3) ... [2019-10-13 21:08:36,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4417c50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:36, skipping insertion in model container [2019-10-13 21:08:36,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:33" (2/3) ... [2019-10-13 21:08:36,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4417c50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:36, skipping insertion in model container [2019-10-13 21:08:36,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:36" (3/3) ... [2019-10-13 21:08:36,316 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2019-10-13 21:08:36,326 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:36,336 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:36,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:36,391 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:36,392 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:36,392 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:36,392 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:36,392 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:36,392 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:36,392 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:36,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states. [2019-10-13 21:08:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:36,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:36,463 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] [2019-10-13 21:08:36,466 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash -270219278, now seen corresponding path program 1 times [2019-10-13 21:08:36,484 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:36,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892276130] [2019-10-13 21:08:36,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:37,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892276130] [2019-10-13 21:08:37,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297525413] [2019-10-13 21:08:37,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:37,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:08:37,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:37,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:38,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:38,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-13 21:08:38,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446519710] [2019-10-13 21:08:38,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:08:38,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:08:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:38,061 INFO L87 Difference]: Start difference. First operand 835 states. Second operand 2 states. [2019-10-13 21:08:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:38,185 INFO L93 Difference]: Finished difference Result 1349 states and 2167 transitions. [2019-10-13 21:08:38,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:08:38,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 113 [2019-10-13 21:08:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:38,231 INFO L225 Difference]: With dead ends: 1349 [2019-10-13 21:08:38,231 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:08:38,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:08:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:08:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:08:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1075 transitions. [2019-10-13 21:08:38,402 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1075 transitions. Word has length 113 [2019-10-13 21:08:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:38,405 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1075 transitions. [2019-10-13 21:08:38,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:08:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1075 transitions. [2019-10-13 21:08:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:38,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:38,413 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] [2019-10-13 21:08:38,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:38,629 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 536745362, now seen corresponding path program 1 times [2019-10-13 21:08:38,630 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:38,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017868309] [2019-10-13 21:08:38,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:38,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017868309] [2019-10-13 21:08:38,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445742203] [2019-10-13 21:08:38,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 2884 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:39,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:39,620 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:39,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:39,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:39,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843096713] [2019-10-13 21:08:39,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:39,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:39,860 INFO L87 Difference]: Start difference. First operand 682 states and 1075 transitions. Second operand 4 states. [2019-10-13 21:08:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:40,005 INFO L93 Difference]: Finished difference Result 1347 states and 2140 transitions. [2019-10-13 21:08:40,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:40,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-13 21:08:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:40,012 INFO L225 Difference]: With dead ends: 1347 [2019-10-13 21:08:40,013 INFO L226 Difference]: Without dead ends: 691 [2019-10-13 21:08:40,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-10-13 21:08:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2019-10-13 21:08:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-13 21:08:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1089 transitions. [2019-10-13 21:08:40,124 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1089 transitions. Word has length 113 [2019-10-13 21:08:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:40,125 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1089 transitions. [2019-10-13 21:08:40,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1089 transitions. [2019-10-13 21:08:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:08:40,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:40,128 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] [2019-10-13 21:08:40,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:40,337 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1841317292, now seen corresponding path program 1 times [2019-10-13 21:08:40,338 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:40,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717244066] [2019-10-13 21:08:40,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:40,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717244066] [2019-10-13 21:08:40,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529105869] [2019-10-13 21:08:40,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:41,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:41,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:41,423 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:41,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:41,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184301792] [2019-10-13 21:08:41,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:41,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:41,426 INFO L87 Difference]: Start difference. First operand 691 states and 1089 transitions. Second operand 7 states. [2019-10-13 21:08:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:41,607 INFO L93 Difference]: Finished difference Result 1365 states and 2165 transitions. [2019-10-13 21:08:41,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:41,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-13 21:08:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:41,615 INFO L225 Difference]: With dead ends: 1365 [2019-10-13 21:08:41,616 INFO L226 Difference]: Without dead ends: 702 [2019-10-13 21:08:41,620 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 [2019-10-13 21:08:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-13 21:08:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 698. [2019-10-13 21:08:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:08:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1101 transitions. [2019-10-13 21:08:41,665 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1101 transitions. Word has length 115 [2019-10-13 21:08:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:41,665 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1101 transitions. [2019-10-13 21:08:41,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1101 transitions. [2019-10-13 21:08:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:41,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:41,671 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] [2019-10-13 21:08:41,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,887 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1924153805, now seen corresponding path program 1 times [2019-10-13 21:08:41,888 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:41,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129042489] [2019-10-13 21:08:41,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:42,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129042489] [2019-10-13 21:08:42,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077793616] [2019-10-13 21:08:42,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:42,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:42,754 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:42,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:42,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:42,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732095369] [2019-10-13 21:08:42,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:42,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:42,888 INFO L87 Difference]: Start difference. First operand 698 states and 1101 transitions. Second operand 4 states. [2019-10-13 21:08:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:42,996 INFO L93 Difference]: Finished difference Result 1381 states and 2190 transitions. [2019-10-13 21:08:42,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:42,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 21:08:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:43,003 INFO L225 Difference]: With dead ends: 1381 [2019-10-13 21:08:43,004 INFO L226 Difference]: Without dead ends: 709 [2019-10-13 21:08:43,008 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 [2019-10-13 21:08:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-13 21:08:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 707. [2019-10-13 21:08:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-13 21:08:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1109 transitions. [2019-10-13 21:08:43,042 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1109 transitions. Word has length 116 [2019-10-13 21:08:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:43,043 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1109 transitions. [2019-10-13 21:08:43,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1109 transitions. [2019-10-13 21:08:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:43,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:43,046 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] [2019-10-13 21:08:43,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:43,254 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash 546326437, now seen corresponding path program 1 times [2019-10-13 21:08:43,255 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:43,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818758701] [2019-10-13 21:08:43,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:43,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818758701] [2019-10-13 21:08:43,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927037412] [2019-10-13 21:08:43,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:43,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:44,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:44,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:44,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:44,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237605194] [2019-10-13 21:08:44,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:44,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:44,346 INFO L87 Difference]: Start difference. First operand 707 states and 1109 transitions. Second operand 7 states. [2019-10-13 21:08:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:44,519 INFO L93 Difference]: Finished difference Result 1382 states and 2181 transitions. [2019-10-13 21:08:44,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:44,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-13 21:08:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:44,527 INFO L225 Difference]: With dead ends: 1382 [2019-10-13 21:08:44,527 INFO L226 Difference]: Without dead ends: 716 [2019-10-13 21:08:44,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-10-13 21:08:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 707. [2019-10-13 21:08:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-13 21:08:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1109 transitions. [2019-10-13 21:08:44,565 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1109 transitions. Word has length 116 [2019-10-13 21:08:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:44,566 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1109 transitions. [2019-10-13 21:08:44,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1109 transitions. [2019-10-13 21:08:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 21:08:44,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:44,569 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] [2019-10-13 21:08:44,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:44,778 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 736421213, now seen corresponding path program 1 times [2019-10-13 21:08:44,778 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:44,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136318361] [2019-10-13 21:08:44,779 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,779 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:44,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136318361] [2019-10-13 21:08:44,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208237926] [2019-10-13 21:08:44,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:45,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:45,594 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:45,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:45,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:45,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272271506] [2019-10-13 21:08:45,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:45,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:45,707 INFO L87 Difference]: Start difference. First operand 707 states and 1109 transitions. Second operand 4 states. [2019-10-13 21:08:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:45,963 INFO L93 Difference]: Finished difference Result 1415 states and 2251 transitions. [2019-10-13 21:08:45,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:45,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-13 21:08:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:45,975 INFO L225 Difference]: With dead ends: 1415 [2019-10-13 21:08:45,975 INFO L226 Difference]: Without dead ends: 749 [2019-10-13 21:08:45,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2019-10-13 21:08:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 746. [2019-10-13 21:08:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 21:08:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1182 transitions. [2019-10-13 21:08:46,019 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1182 transitions. Word has length 119 [2019-10-13 21:08:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:46,019 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1182 transitions. [2019-10-13 21:08:46,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1182 transitions. [2019-10-13 21:08:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:08:46,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:46,022 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] [2019-10-13 21:08:46,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,239 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1108082173, now seen corresponding path program 1 times [2019-10-13 21:08:46,239 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:46,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694620752] [2019-10-13 21:08:46,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:46,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694620752] [2019-10-13 21:08:46,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768543636] [2019-10-13 21:08:46,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:47,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:47,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:47,215 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:47,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:47,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822749778] [2019-10-13 21:08:47,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:47,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:47,218 INFO L87 Difference]: Start difference. First operand 746 states and 1182 transitions. Second operand 5 states. [2019-10-13 21:08:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,312 INFO L93 Difference]: Finished difference Result 1439 states and 2297 transitions. [2019-10-13 21:08:47,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:47,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-13 21:08:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,320 INFO L225 Difference]: With dead ends: 1439 [2019-10-13 21:08:47,320 INFO L226 Difference]: Without dead ends: 746 [2019-10-13 21:08:47,325 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 [2019-10-13 21:08:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-10-13 21:08:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2019-10-13 21:08:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 21:08:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1177 transitions. [2019-10-13 21:08:47,364 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1177 transitions. Word has length 121 [2019-10-13 21:08:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,365 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1177 transitions. [2019-10-13 21:08:47,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1177 transitions. [2019-10-13 21:08:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:08:47,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,369 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] [2019-10-13 21:08:47,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,586 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -546984174, now seen corresponding path program 1 times [2019-10-13 21:08:47,587 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609165236] [2019-10-13 21:08:47,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:47,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609165236] [2019-10-13 21:08:47,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901627653] [2019-10-13 21:08:47,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:48,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:48,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:48,689 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:48,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:48,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462073681] [2019-10-13 21:08:48,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:48,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:48,695 INFO L87 Difference]: Start difference. First operand 746 states and 1177 transitions. Second operand 11 states. [2019-10-13 21:08:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:48,920 INFO L93 Difference]: Finished difference Result 1413 states and 2238 transitions. [2019-10-13 21:08:48,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:48,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-10-13 21:08:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:48,930 INFO L225 Difference]: With dead ends: 1413 [2019-10-13 21:08:48,930 INFO L226 Difference]: Without dead ends: 766 [2019-10-13 21:08:48,936 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 [2019-10-13 21:08:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2019-10-13 21:08:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 753. [2019-10-13 21:08:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-10-13 21:08:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1188 transitions. [2019-10-13 21:08:48,989 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1188 transitions. Word has length 122 [2019-10-13 21:08:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:48,991 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1188 transitions. [2019-10-13 21:08:48,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1188 transitions. [2019-10-13 21:08:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:08:48,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:48,996 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] [2019-10-13 21:08:49,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,206 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1594119675, now seen corresponding path program 1 times [2019-10-13 21:08:49,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589588870] [2019-10-13 21:08:49,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:49,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589588870] [2019-10-13 21:08:49,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524486468] [2019-10-13 21:08:49,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:49,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:49,977 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:50,155 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:50,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:08:50,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613512256] [2019-10-13 21:08:50,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:08:50,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:08:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:50,157 INFO L87 Difference]: Start difference. First operand 753 states and 1188 transitions. Second operand 8 states. [2019-10-13 21:08:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,305 INFO L93 Difference]: Finished difference Result 1411 states and 2234 transitions. [2019-10-13 21:08:50,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:50,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-13 21:08:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,314 INFO L225 Difference]: With dead ends: 1411 [2019-10-13 21:08:50,314 INFO L226 Difference]: Without dead ends: 764 [2019-10-13 21:08:50,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2019-10-13 21:08:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 757. [2019-10-13 21:08:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2019-10-13 21:08:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1193 transitions. [2019-10-13 21:08:50,354 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1193 transitions. Word has length 123 [2019-10-13 21:08:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,354 INFO L462 AbstractCegarLoop]: Abstraction has 757 states and 1193 transitions. [2019-10-13 21:08:50,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:08:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1193 transitions. [2019-10-13 21:08:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:08:50,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,358 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] [2019-10-13 21:08:50,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,569 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash -478392882, now seen corresponding path program 1 times [2019-10-13 21:08:50,570 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:50,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071628736] [2019-10-13 21:08:50,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:50,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071628736] [2019-10-13 21:08:50,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080904500] [2019-10-13 21:08:50,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:51,365 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:51,502 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:51,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:51,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827707511] [2019-10-13 21:08:51,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:51,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:51,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:51,504 INFO L87 Difference]: Start difference. First operand 757 states and 1193 transitions. Second operand 5 states. [2019-10-13 21:08:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:51,796 INFO L93 Difference]: Finished difference Result 1449 states and 2311 transitions. [2019-10-13 21:08:51,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:51,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-13 21:08:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:51,804 INFO L225 Difference]: With dead ends: 1449 [2019-10-13 21:08:51,804 INFO L226 Difference]: Without dead ends: 802 [2019-10-13 21:08:51,809 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 [2019-10-13 21:08:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2019-10-13 21:08:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 799. [2019-10-13 21:08:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-10-13 21:08:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1269 transitions. [2019-10-13 21:08:51,855 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1269 transitions. Word has length 124 [2019-10-13 21:08:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:51,856 INFO L462 AbstractCegarLoop]: Abstraction has 799 states and 1269 transitions. [2019-10-13 21:08:51,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1269 transitions. [2019-10-13 21:08:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:08:51,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:51,859 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] [2019-10-13 21:08:52,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,076 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -862024985, now seen corresponding path program 1 times [2019-10-13 21:08:52,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332246472] [2019-10-13 21:08:52,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:52,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332246472] [2019-10-13 21:08:52,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686966094] [2019-10-13 21:08:52,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:52,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:52,839 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:52,945 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:52,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:52,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575247242] [2019-10-13 21:08:52,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:52,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:52,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:52,947 INFO L87 Difference]: Start difference. First operand 799 states and 1269 transitions. Second operand 6 states. [2019-10-13 21:08:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,025 INFO L93 Difference]: Finished difference Result 1503 states and 2396 transitions. [2019-10-13 21:08:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:53,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 21:08:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,032 INFO L225 Difference]: With dead ends: 1503 [2019-10-13 21:08:53,032 INFO L226 Difference]: Without dead ends: 795 [2019-10-13 21:08:53,036 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 [2019-10-13 21:08:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-10-13 21:08:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 792. [2019-10-13 21:08:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2019-10-13 21:08:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1256 transitions. [2019-10-13 21:08:53,063 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1256 transitions. Word has length 125 [2019-10-13 21:08:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,064 INFO L462 AbstractCegarLoop]: Abstraction has 792 states and 1256 transitions. [2019-10-13 21:08:53,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1256 transitions. [2019-10-13 21:08:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:08:53,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,067 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] [2019-10-13 21:08:53,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,283 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1453671361, now seen corresponding path program 1 times [2019-10-13 21:08:53,284 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537539247] [2019-10-13 21:08:53,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537539247] [2019-10-13 21:08:53,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186958142] [2019-10-13 21:08:53,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:08:54,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:54,288 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:54,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:08:54,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560051570] [2019-10-13 21:08:54,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:54,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:54,290 INFO L87 Difference]: Start difference. First operand 792 states and 1256 transitions. Second operand 4 states. [2019-10-13 21:08:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,594 INFO L93 Difference]: Finished difference Result 2711 states and 4355 transitions. [2019-10-13 21:08:55,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:08:55,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-13 21:08:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,614 INFO L225 Difference]: With dead ends: 2711 [2019-10-13 21:08:55,614 INFO L226 Difference]: Without dead ends: 2068 [2019-10-13 21:08:55,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-13 21:08:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1926. [2019-10-13 21:08:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2019-10-13 21:08:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 3096 transitions. [2019-10-13 21:08:55,704 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 3096 transitions. Word has length 126 [2019-10-13 21:08:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,705 INFO L462 AbstractCegarLoop]: Abstraction has 1926 states and 3096 transitions. [2019-10-13 21:08:55,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 3096 transitions. [2019-10-13 21:08:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 21:08:55,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,715 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:55,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,923 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1845942584, now seen corresponding path program 1 times [2019-10-13 21:08:55,924 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215903847] [2019-10-13 21:08:55,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:56,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215903847] [2019-10-13 21:08:56,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608490528] [2019-10-13 21:08:56,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 3270 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 21:08:56,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:08:56,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:08:57,074 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:57,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 9 [2019-10-13 21:08:57,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099529850] [2019-10-13 21:08:57,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:57,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:08:57,076 INFO L87 Difference]: Start difference. First operand 1926 states and 3096 transitions. Second operand 7 states. [2019-10-13 21:08:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,997 INFO L93 Difference]: Finished difference Result 4353 states and 7002 transitions. [2019-10-13 21:08:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:08:57,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2019-10-13 21:08:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:58,017 INFO L225 Difference]: With dead ends: 4353 [2019-10-13 21:08:58,018 INFO L226 Difference]: Without dead ends: 2576 [2019-10-13 21:08:58,029 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2019-10-13 21:08:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2572. [2019-10-13 21:08:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2572 states. [2019-10-13 21:08:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 4110 transitions. [2019-10-13 21:08:58,146 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 4110 transitions. Word has length 184 [2019-10-13 21:08:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:58,147 INFO L462 AbstractCegarLoop]: Abstraction has 2572 states and 4110 transitions. [2019-10-13 21:08:58,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 4110 transitions. [2019-10-13 21:08:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 21:08:58,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:58,156 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:58,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,366 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,366 INFO L82 PathProgramCache]: Analyzing trace with hash -3278018, now seen corresponding path program 1 times [2019-10-13 21:08:58,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016357467] [2019-10-13 21:08:58,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:58,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016357467] [2019-10-13 21:08:58,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427944867] [2019-10-13 21:08:58,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:08:59,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:59,198 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:59,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:59,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:08:59,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429177985] [2019-10-13 21:08:59,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:59,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:59,668 INFO L87 Difference]: Start difference. First operand 2572 states and 4110 transitions. Second operand 5 states. [2019-10-13 21:09:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:00,683 INFO L93 Difference]: Finished difference Result 5035 states and 8238 transitions. [2019-10-13 21:09:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:00,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-13 21:09:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:00,701 INFO L225 Difference]: With dead ends: 5035 [2019-10-13 21:09:00,702 INFO L226 Difference]: Without dead ends: 2612 [2019-10-13 21:09:00,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2019-10-13 21:09:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2612. [2019-10-13 21:09:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2612 states. [2019-10-13 21:09:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 4174 transitions. [2019-10-13 21:09:00,848 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 4174 transitions. Word has length 185 [2019-10-13 21:09:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:00,851 INFO L462 AbstractCegarLoop]: Abstraction has 2612 states and 4174 transitions. [2019-10-13 21:09:00,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 4174 transitions. [2019-10-13 21:09:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 21:09:00,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:00,860 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:01,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,069 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash -299526448, now seen corresponding path program 1 times [2019-10-13 21:09:01,070 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:01,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678739232] [2019-10-13 21:09:01,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:01,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678739232] [2019-10-13 21:09:01,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085710942] [2019-10-13 21:09:01,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:01,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:01,961 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:02,524 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:02,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:02,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908714353] [2019-10-13 21:09:02,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:02,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:02,527 INFO L87 Difference]: Start difference. First operand 2612 states and 4174 transitions. Second operand 5 states. [2019-10-13 21:09:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:03,532 INFO L93 Difference]: Finished difference Result 5115 states and 8353 transitions. [2019-10-13 21:09:03,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:03,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-13 21:09:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,552 INFO L225 Difference]: With dead ends: 5115 [2019-10-13 21:09:03,552 INFO L226 Difference]: Without dead ends: 2652 [2019-10-13 21:09:03,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 363 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2019-10-13 21:09:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2652. [2019-10-13 21:09:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-10-13 21:09:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4238 transitions. [2019-10-13 21:09:03,671 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4238 transitions. Word has length 187 [2019-10-13 21:09:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:03,672 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 4238 transitions. [2019-10-13 21:09:03,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4238 transitions. [2019-10-13 21:09:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 21:09:03,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:03,680 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:03,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:03,889 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1601202366, now seen corresponding path program 1 times [2019-10-13 21:09:03,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:03,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502509536] [2019-10-13 21:09:03,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:03,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502509536] [2019-10-13 21:09:03,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122049236] [2019-10-13 21:09:03,994 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