java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:40,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:40,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:40,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:40,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:40,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:40,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:40,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:40,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:40,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:40,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:40,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:40,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:40,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:40,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:40,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:40,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:40,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:40,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:40,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:40,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:40,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:40,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:40,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:40,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:40,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:40,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:40,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:40,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:40,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:40,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:40,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:40,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:40,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:40,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:40,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:40,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:40,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:40,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:40,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:40,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:40,811 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 21:09:40,825 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:40,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:40,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:40,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:40,827 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:40,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:40,828 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:40,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:40,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:40,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:40,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:40,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:40,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:40,829 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:40,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:40,830 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:40,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:40,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:40,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:40,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:40,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:40,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:40,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:40,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:40,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:40,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:40,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:40,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:40,832 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 21:09:41,113 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:41,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:41,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:41,134 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:41,134 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:41,135 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-10-13 21:09:41,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fccf034/91a3319d0b4346cbbe2d2b28123cc060/FLAG2e987bc0f [2019-10-13 21:09:41,929 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:41,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-10-13 21:09:41,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fccf034/91a3319d0b4346cbbe2d2b28123cc060/FLAG2e987bc0f [2019-10-13 21:09:42,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fccf034/91a3319d0b4346cbbe2d2b28123cc060 [2019-10-13 21:09:42,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:42,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:42,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:42,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:42,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:42,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:42" (1/1) ... [2019-10-13 21:09:42,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a2e2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:42, skipping insertion in model container [2019-10-13 21:09:42,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:42" (1/1) ... [2019-10-13 21:09:42,069 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:42,157 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:42,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:42,832 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:43,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:43,081 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:43,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43 WrapperNode [2019-10-13 21:09:43,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:43,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:43,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:43,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:43,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:43,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:43,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:43,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:43,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (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 21:09:43,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:43,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:43,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:43,388 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:43,420 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:43,420 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:43,420 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:43,421 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:43,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:46,153 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:46,154 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:46,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46 BoogieIcfgContainer [2019-10-13 21:09:46,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:46,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:46,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:46,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:46,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:42" (1/3) ... [2019-10-13 21:09:46,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc8a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (2/3) ... [2019-10-13 21:09:46,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc8a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46" (3/3) ... [2019-10-13 21:09:46,167 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2019-10-13 21:09:46,178 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:46,189 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:46,202 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:46,253 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:46,253 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:46,253 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:46,253 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:46,253 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:46,254 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:46,254 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:46,254 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states. [2019-10-13 21:09:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:09:46,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:46,332 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:46,335 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1132113922, now seen corresponding path program 1 times [2019-10-13 21:09:46,349 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:46,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552910548] [2019-10-13 21:09:46,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:47,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552910548] [2019-10-13 21:09:47,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240017599] [2019-10-13 21:09:47,010 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 21:09:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:47,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:47,808 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,066 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:48,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:48,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102784866] [2019-10-13 21:09:48,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:48,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,096 INFO L87 Difference]: Start difference. First operand 743 states. Second operand 2 states. [2019-10-13 21:09:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,180 INFO L93 Difference]: Finished difference Result 626 states and 1002 transitions. [2019-10-13 21:09:48,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:48,181 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-13 21:09:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,231 INFO L225 Difference]: With dead ends: 626 [2019-10-13 21:09:48,232 INFO L226 Difference]: Without dead ends: 589 [2019-10-13 21:09:48,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-13 21:09:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-13 21:09:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-13 21:09:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 947 transitions. [2019-10-13 21:09:48,371 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 947 transitions. Word has length 138 [2019-10-13 21:09:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:48,379 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 947 transitions. [2019-10-13 21:09:48,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 947 transitions. [2019-10-13 21:09:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:48,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:48,394 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:48,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,603 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash 296066837, now seen corresponding path program 1 times [2019-10-13 21:09:48,604 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:48,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124233208] [2019-10-13 21:09:48,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:48,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124233208] [2019-10-13 21:09:48,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053821158] [2019-10-13 21:09:48,804 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 21:09:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:49,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:49,496 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:49,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:49,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:49,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240638845] [2019-10-13 21:09:49,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:49,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:49,822 INFO L87 Difference]: Start difference. First operand 589 states and 947 transitions. Second operand 4 states. [2019-10-13 21:09:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:49,944 INFO L93 Difference]: Finished difference Result 1150 states and 1867 transitions. [2019-10-13 21:09:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:49,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:09:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:49,952 INFO L225 Difference]: With dead ends: 1150 [2019-10-13 21:09:49,953 INFO L226 Difference]: Without dead ends: 589 [2019-10-13 21:09:49,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-13 21:09:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-13 21:09:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-13 21:09:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 946 transitions. [2019-10-13 21:09:49,998 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 946 transitions. Word has length 140 [2019-10-13 21:09:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:49,999 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 946 transitions. [2019-10-13 21:09:49,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 946 transitions. [2019-10-13 21:09:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:09:50,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,006 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:50,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,225 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1619685945, now seen corresponding path program 1 times [2019-10-13 21:09:50,226 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474452343] [2019-10-13 21:09:50,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:50,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474452343] [2019-10-13 21:09:50,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25103559] [2019-10-13 21:09:50,388 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 21:09:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:51,083 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:51,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720454258] [2019-10-13 21:09:51,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,315 INFO L87 Difference]: Start difference. First operand 589 states and 946 transitions. Second operand 4 states. [2019-10-13 21:09:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:51,439 INFO L93 Difference]: Finished difference Result 1150 states and 1865 transitions. [2019-10-13 21:09:51,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:51,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 21:09:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:51,445 INFO L225 Difference]: With dead ends: 1150 [2019-10-13 21:09:51,446 INFO L226 Difference]: Without dead ends: 589 [2019-10-13 21:09:51,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-13 21:09:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-13 21:09:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-13 21:09:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 945 transitions. [2019-10-13 21:09:51,483 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 945 transitions. Word has length 142 [2019-10-13 21:09:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:51,483 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 945 transitions. [2019-10-13 21:09:51,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 945 transitions. [2019-10-13 21:09:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:09:51,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,489 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:51,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,698 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1401716195, now seen corresponding path program 1 times [2019-10-13 21:09:51,699 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:51,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734552214] [2019-10-13 21:09:51,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734552214] [2019-10-13 21:09:51,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646962834] [2019-10-13 21:09:51,856 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 21:09:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:52,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:52,529 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:52,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:52,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:52,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780554944] [2019-10-13 21:09:52,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:52,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:52,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:52,831 INFO L87 Difference]: Start difference. First operand 589 states and 945 transitions. Second operand 4 states. [2019-10-13 21:09:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,923 INFO L93 Difference]: Finished difference Result 1157 states and 1872 transitions. [2019-10-13 21:09:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:52,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 21:09:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,931 INFO L225 Difference]: With dead ends: 1157 [2019-10-13 21:09:52,932 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:52,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 957 transitions. [2019-10-13 21:09:52,970 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 957 transitions. Word has length 144 [2019-10-13 21:09:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,972 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 957 transitions. [2019-10-13 21:09:52,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 957 transitions. [2019-10-13 21:09:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:09:52,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,978 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:53,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1990322423, now seen corresponding path program 1 times [2019-10-13 21:09:53,188 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663197122] [2019-10-13 21:09:53,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:53,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663197122] [2019-10-13 21:09:53,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269773790] [2019-10-13 21:09:53,331 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 21:09:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:53,999 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:54,228 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:54,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:54,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744052518] [2019-10-13 21:09:54,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:54,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:54,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:54,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:54,231 INFO L87 Difference]: Start difference. First operand 598 states and 957 transitions. Second operand 4 states. [2019-10-13 21:09:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:54,308 INFO L93 Difference]: Finished difference Result 1159 states and 1873 transitions. [2019-10-13 21:09:54,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:54,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 21:09:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:54,314 INFO L225 Difference]: With dead ends: 1159 [2019-10-13 21:09:54,314 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:54,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 956 transitions. [2019-10-13 21:09:54,341 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 956 transitions. Word has length 145 [2019-10-13 21:09:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:54,341 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 956 transitions. [2019-10-13 21:09:54,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 956 transitions. [2019-10-13 21:09:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:09:54,346 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:54,346 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:54,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,554 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash 769578593, now seen corresponding path program 1 times [2019-10-13 21:09:54,555 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:54,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652728050] [2019-10-13 21:09:54,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,556 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:54,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652728050] [2019-10-13 21:09:54,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64390045] [2019-10-13 21:09:54,765 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 21:09:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:55,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:55,446 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:55,665 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:55,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924069675] [2019-10-13 21:09:55,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:55,668 INFO L87 Difference]: Start difference. First operand 598 states and 956 transitions. Second operand 4 states. [2019-10-13 21:09:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,738 INFO L93 Difference]: Finished difference Result 1159 states and 1872 transitions. [2019-10-13 21:09:55,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:55,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 21:09:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,744 INFO L225 Difference]: With dead ends: 1159 [2019-10-13 21:09:55,744 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:55,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 955 transitions. [2019-10-13 21:09:55,774 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 955 transitions. Word has length 146 [2019-10-13 21:09:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,775 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 955 transitions. [2019-10-13 21:09:55,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 955 transitions. [2019-10-13 21:09:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:55,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,779 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:55,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,997 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1713500357, now seen corresponding path program 1 times [2019-10-13 21:09:55,998 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973415795] [2019-10-13 21:09:55,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:56,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973415795] [2019-10-13 21:09:56,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947560182] [2019-10-13 21:09:56,205 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 21:09:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:57,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:57,473 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:57,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:57,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399725535] [2019-10-13 21:09:57,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:57,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:57,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:57,477 INFO L87 Difference]: Start difference. First operand 598 states and 955 transitions. Second operand 7 states. [2019-10-13 21:09:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:57,672 INFO L93 Difference]: Finished difference Result 1166 states and 1881 transitions. [2019-10-13 21:09:57,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:57,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-13 21:09:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:57,678 INFO L225 Difference]: With dead ends: 1166 [2019-10-13 21:09:57,678 INFO L226 Difference]: Without dead ends: 609 [2019-10-13 21:09:57,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-13 21:09:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2019-10-13 21:09:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 965 transitions. [2019-10-13 21:09:57,712 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 965 transitions. Word has length 147 [2019-10-13 21:09:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:57,713 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 965 transitions. [2019-10-13 21:09:57,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 965 transitions. [2019-10-13 21:09:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:57,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:57,718 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:57,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,927 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1757785468, now seen corresponding path program 1 times [2019-10-13 21:09:57,928 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866524447] [2019-10-13 21:09:57,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866524447] [2019-10-13 21:09:58,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18730473] [2019-10-13 21:09:58,058 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 21:09:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:58,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:58,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035749075] [2019-10-13 21:09:59,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,047 INFO L87 Difference]: Start difference. First operand 605 states and 965 transitions. Second operand 4 states. [2019-10-13 21:09:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,210 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2019-10-13 21:09:59,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:59,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-13 21:09:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,218 INFO L225 Difference]: With dead ends: 1171 [2019-10-13 21:09:59,218 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:09:59,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:09:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:09:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 960 transitions. [2019-10-13 21:09:59,247 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 960 transitions. Word has length 147 [2019-10-13 21:09:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,247 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 960 transitions. [2019-10-13 21:09:59,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 960 transitions. [2019-10-13 21:09:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:09:59,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,252 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:59,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,461 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash 157892612, now seen corresponding path program 1 times [2019-10-13 21:09:59,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:59,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098010039] [2019-10-13 21:09:59,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:09:59,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098010039] [2019-10-13 21:09:59,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355746607] [2019-10-13 21:09:59,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 3220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:00,645 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:00,777 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 1 [2019-10-13 21:10:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:00,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:00,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:00,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474564900] [2019-10-13 21:10:00,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:00,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:00,985 INFO L87 Difference]: Start difference. First operand 605 states and 960 transitions. Second operand 4 states. [2019-10-13 21:10:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,140 INFO L93 Difference]: Finished difference Result 1171 states and 1882 transitions. [2019-10-13 21:10:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:01,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-10-13 21:10:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,146 INFO L225 Difference]: With dead ends: 1171 [2019-10-13 21:10:01,147 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:10:01,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:10:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:10:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:10:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 955 transitions. [2019-10-13 21:10:01,179 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 955 transitions. Word has length 150 [2019-10-13 21:10:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,180 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 955 transitions. [2019-10-13 21:10:01,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 955 transitions. [2019-10-13 21:10:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:01,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,185 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:01,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,398 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash 500102925, now seen corresponding path program 1 times [2019-10-13 21:10:01,400 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238285868] [2019-10-13 21:10:01,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:01,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238285868] [2019-10-13 21:10:01,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455535855] [2019-10-13 21:10:01,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 3221 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:02,303 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:02,661 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-13 21:10:02,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929326510] [2019-10-13 21:10:02,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:02,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:02,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:02,667 INFO L87 Difference]: Start difference. First operand 605 states and 955 transitions. Second operand 7 states. [2019-10-13 21:10:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,806 INFO L93 Difference]: Finished difference Result 1172 states and 1870 transitions. [2019-10-13 21:10:02,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:02,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2019-10-13 21:10:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,812 INFO L225 Difference]: With dead ends: 1172 [2019-10-13 21:10:02,812 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:10:02,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 294 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:10:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 608. [2019-10-13 21:10:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-10-13 21:10:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 960 transitions. [2019-10-13 21:10:02,839 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 960 transitions. Word has length 152 [2019-10-13 21:10:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,841 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 960 transitions. [2019-10-13 21:10:02,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 960 transitions. [2019-10-13 21:10:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:02,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,847 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:03,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,060 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1481059154, now seen corresponding path program 1 times [2019-10-13 21:10:03,060 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136646987] [2019-10-13 21:10:03,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:03,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136646987] [2019-10-13 21:10:03,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336645694] [2019-10-13 21:10:03,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 3222 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:03,988 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:04,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436256592] [2019-10-13 21:10:04,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:04,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:04,214 INFO L87 Difference]: Start difference. First operand 608 states and 960 transitions. Second operand 4 states. [2019-10-13 21:10:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,407 INFO L93 Difference]: Finished difference Result 1216 states and 1941 transitions. [2019-10-13 21:10:04,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:04,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:10:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,412 INFO L225 Difference]: With dead ends: 1216 [2019-10-13 21:10:04,413 INFO L226 Difference]: Without dead ends: 653 [2019-10-13 21:10:04,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-13 21:10:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 647. [2019-10-13 21:10:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:10:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1022 transitions. [2019-10-13 21:10:04,436 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1022 transitions. Word has length 152 [2019-10-13 21:10:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,437 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1022 transitions. [2019-10-13 21:10:04,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1022 transitions. [2019-10-13 21:10:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:04,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,441 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,657 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2098391086, now seen corresponding path program 1 times [2019-10-13 21:10:04,658 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714008058] [2019-10-13 21:10:04,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:04,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714008058] [2019-10-13 21:10:04,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296610036] [2019-10-13 21:10:04,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:05,684 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:06,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:06,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614758030] [2019-10-13 21:10:06,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:06,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:06,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:06,180 INFO L87 Difference]: Start difference. First operand 647 states and 1022 transitions. Second operand 9 states. [2019-10-13 21:10:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,403 INFO L93 Difference]: Finished difference Result 1217 states and 1942 transitions. [2019-10-13 21:10:06,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:06,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-13 21:10:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,409 INFO L225 Difference]: With dead ends: 1217 [2019-10-13 21:10:06,409 INFO L226 Difference]: Without dead ends: 658 [2019-10-13 21:10:06,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-13 21:10:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2019-10-13 21:10:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-10-13 21:10:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1026 transitions. [2019-10-13 21:10:06,439 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1026 transitions. Word has length 152 [2019-10-13 21:10:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,440 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 1026 transitions. [2019-10-13 21:10:06,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1026 transitions. [2019-10-13 21:10:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:06,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,653 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash -215414131, now seen corresponding path program 1 times [2019-10-13 21:10:06,654 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488695419] [2019-10-13 21:10:06,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:06,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488695419] [2019-10-13 21:10:06,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227828587] [2019-10-13 21:10:06,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:07,574 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:07,992 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:07,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:07,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666515424] [2019-10-13 21:10:07,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:07,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:07,994 INFO L87 Difference]: Start difference. First operand 649 states and 1026 transitions. Second operand 11 states. [2019-10-13 21:10:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,159 INFO L93 Difference]: Finished difference Result 1151 states and 1839 transitions. [2019-10-13 21:10:08,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:08,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-13 21:10:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,165 INFO L225 Difference]: With dead ends: 1151 [2019-10-13 21:10:08,165 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:08,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-10-13 21:10:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-10-13 21:10:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1036 transitions. [2019-10-13 21:10:08,196 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1036 transitions. Word has length 152 [2019-10-13 21:10:08,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,197 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1036 transitions. [2019-10-13 21:10:08,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1036 transitions. [2019-10-13 21:10:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:08,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,202 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:08,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,411 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1619123996, now seen corresponding path program 1 times [2019-10-13 21:10:08,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605121317] [2019-10-13 21:10:08,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:08,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605121317] [2019-10-13 21:10:08,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66104372] [2019-10-13 21:10:08,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:09,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,604 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:09,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:09,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557674723] [2019-10-13 21:10:09,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:09,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:09,606 INFO L87 Difference]: Start difference. First operand 656 states and 1036 transitions. Second operand 8 states. [2019-10-13 21:10:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,718 INFO L93 Difference]: Finished difference Result 1155 states and 1846 transitions. [2019-10-13 21:10:09,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:09,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2019-10-13 21:10:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,724 INFO L225 Difference]: With dead ends: 1155 [2019-10-13 21:10:09,724 INFO L226 Difference]: Without dead ends: 670 [2019-10-13 21:10:09,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-10-13 21:10:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 663. [2019-10-13 21:10:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-13 21:10:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-10-13 21:10:09,771 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-10-13 21:10:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,771 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-10-13 21:10:09,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-10-13 21:10:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:09,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,776 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,985 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash 609178724, now seen corresponding path program 1 times [2019-10-13 21:10:09,986 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955202474] [2019-10-13 21:10:09,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:10,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955202474] [2019-10-13 21:10:10,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387599098] [2019-10-13 21:10:10,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:11,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:11,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:11,539 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:11,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:11,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880944940] [2019-10-13 21:10:11,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:11,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:11,541 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 14 states. [2019-10-13 21:10:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:11,836 INFO L93 Difference]: Finished difference Result 1156 states and 1848 transitions. [2019-10-13 21:10:11,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:11,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-10-13 21:10:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:11,841 INFO L225 Difference]: With dead ends: 1156 [2019-10-13 21:10:11,841 INFO L226 Difference]: Without dead ends: 671 [2019-10-13 21:10:11,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-10-13 21:10:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 663. [2019-10-13 21:10:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-13 21:10:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-10-13 21:10:11,878 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-10-13 21:10:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:11,878 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-10-13 21:10:11,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-10-13 21:10:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:10:11,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:11,883 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,092 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1274916198, now seen corresponding path program 1 times [2019-10-13 21:10:12,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107989767] [2019-10-13 21:10:12,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:12,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107989767] [2019-10-13 21:10:12,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294102066] [2019-10-13 21:10:12,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:13,016 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:13,474 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:13,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:13,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229900312] [2019-10-13 21:10:13,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:13,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:13,477 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 11 states. [2019-10-13 21:10:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,727 INFO L93 Difference]: Finished difference Result 1159 states and 1858 transitions. [2019-10-13 21:10:13,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:13,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-13 21:10:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,737 INFO L225 Difference]: With dead ends: 1159 [2019-10-13 21:10:13,737 INFO L226 Difference]: Without dead ends: 674 [2019-10-13 21:10:13,741 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-13 21:10:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 665. [2019-10-13 21:10:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-10-13 21:10:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1054 transitions. [2019-10-13 21:10:13,775 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1054 transitions. Word has length 154 [2019-10-13 21:10:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,775 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 1054 transitions. [2019-10-13 21:10:13,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1054 transitions. [2019-10-13 21:10:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:10:13,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,781 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:14,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,000 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,001 INFO L82 PathProgramCache]: Analyzing trace with hash 685050111, now seen corresponding path program 1 times [2019-10-13 21:10:14,001 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452299099] [2019-10-13 21:10:14,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:14,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452299099] [2019-10-13 21:10:14,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832572113] [2019-10-13 21:10:14,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:14,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:15,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:15,234 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:15,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:15,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590390609] [2019-10-13 21:10:15,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:15,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:15,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:15,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:15,237 INFO L87 Difference]: Start difference. First operand 665 states and 1054 transitions. Second operand 9 states. [2019-10-13 21:10:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:15,394 INFO L93 Difference]: Finished difference Result 1255 states and 2027 transitions. [2019-10-13 21:10:15,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:15,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-13 21:10:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:15,399 INFO L225 Difference]: With dead ends: 1255 [2019-10-13 21:10:15,400 INFO L226 Difference]: Without dead ends: 674 [2019-10-13 21:10:15,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-13 21:10:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2019-10-13 21:10:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2019-10-13 21:10:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1062 transitions. [2019-10-13 21:10:15,427 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1062 transitions. Word has length 155 [2019-10-13 21:10:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:15,428 INFO L462 AbstractCegarLoop]: Abstraction has 672 states and 1062 transitions. [2019-10-13 21:10:15,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1062 transitions. [2019-10-13 21:10:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:10:15,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:15,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:15,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,641 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 810500539, now seen corresponding path program 1 times [2019-10-13 21:10:15,642 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:15,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073579330] [2019-10-13 21:10:15,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:15,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073579330] [2019-10-13 21:10:15,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466373011] [2019-10-13 21:10:15,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true