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_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:18,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:18,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:18,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:18,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:18,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:18,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:18,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:18,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:18,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:18,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:18,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:18,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:18,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:18,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:18,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:18,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:18,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:18,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:18,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:18,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:18,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:18,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:18,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:18,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:18,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:18,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:18,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:18,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:18,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:18,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:18,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:18,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:18,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:18,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:18,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:18,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:18,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:18,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:18,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:18,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:18,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:18,855 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:18,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:18,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:18,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:18,857 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:18,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:18,858 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:18,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:18,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:18,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:18,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:18,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:18,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:18,859 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:18,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:18,860 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:18,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:18,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:18,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:18,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:18,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:18,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:18,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:18,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:18,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:18,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:18,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:18,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:18,862 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:19,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:19,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:19,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:19,186 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:19,186 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:19,187 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-10-13 21:10:19,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02dcc33cb/70573022d0a74763afa699e1efa34d2f/FLAG2bcabec94 [2019-10-13 21:10:19,922 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:19,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-10-13 21:10:19,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02dcc33cb/70573022d0a74763afa699e1efa34d2f/FLAG2bcabec94 [2019-10-13 21:10:20,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02dcc33cb/70573022d0a74763afa699e1efa34d2f [2019-10-13 21:10:20,124 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:20,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:20,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:20,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:20,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:20,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:20" (1/1) ... [2019-10-13 21:10:20,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4771d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:20, skipping insertion in model container [2019-10-13 21:10:20,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:20" (1/1) ... [2019-10-13 21:10:20,143 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:20,225 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:20,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:21,014 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:21,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:21,185 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:21,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21 WrapperNode [2019-10-13 21:10:21,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:21,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:21,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:21,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:21,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:21,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:21,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:21,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:21,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:21,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:10:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:10:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:10:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:10:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:10:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:21,491 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:21,491 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:21,491 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:21,491 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:21,491 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:21,493 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:21,493 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:21,493 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:21,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:21,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:10:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:10:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:10:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:24,091 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:24,092 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:24,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:24 BoogieIcfgContainer [2019-10-13 21:10:24,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:24,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:24,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:24,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:24,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:20" (1/3) ... [2019-10-13 21:10:24,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c9134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:24, skipping insertion in model container [2019-10-13 21:10:24,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (2/3) ... [2019-10-13 21:10:24,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c9134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:24, skipping insertion in model container [2019-10-13 21:10:24,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:24" (3/3) ... [2019-10-13 21:10:24,103 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2019-10-13 21:10:24,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:24,127 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:24,142 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:24,187 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:24,187 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:24,187 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:24,187 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:24,187 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:24,187 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:24,188 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:24,188 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states. [2019-10-13 21:10:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:10:24,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,279 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] [2019-10-13 21:10:24,286 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,294 INFO L82 PathProgramCache]: Analyzing trace with hash 56445338, now seen corresponding path program 1 times [2019-10-13 21:10:24,306 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992565794] [2019-10-13 21:10:24,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,061 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 21:10:25,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992565794] [2019-10-13 21:10:25,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512692794] [2019-10-13 21:10:25,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,888 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 21:10:25,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:26,108 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 21:10:26,109 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:26,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:26,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86499659] [2019-10-13 21:10:26,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:26,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:26,136 INFO L87 Difference]: Start difference. First operand 834 states. Second operand 2 states. [2019-10-13 21:10:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:26,213 INFO L93 Difference]: Finished difference Result 710 states and 1117 transitions. [2019-10-13 21:10:26,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:26,215 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:10:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:26,261 INFO L225 Difference]: With dead ends: 710 [2019-10-13 21:10:26,261 INFO L226 Difference]: Without dead ends: 673 [2019-10-13 21:10:26,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-13 21:10:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-13 21:10:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:10:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1062 transitions. [2019-10-13 21:10:26,450 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1062 transitions. Word has length 116 [2019-10-13 21:10:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,458 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1062 transitions. [2019-10-13 21:10:26,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1062 transitions. [2019-10-13 21:10:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:10:26,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,478 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] [2019-10-13 21:10:26,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,679 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1775152457, now seen corresponding path program 1 times [2019-10-13 21:10:26,680 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143503274] [2019-10-13 21:10:26,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,019 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 21:10:27,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143503274] [2019-10-13 21:10:27,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495937761] [2019-10-13 21:10:27,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,746 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 21:10:27,746 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:28,030 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 21:10:28,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:28,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:28,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256431637] [2019-10-13 21:10:28,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:28,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:28,036 INFO L87 Difference]: Start difference. First operand 673 states and 1062 transitions. Second operand 4 states. [2019-10-13 21:10:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:28,191 INFO L93 Difference]: Finished difference Result 1318 states and 2097 transitions. [2019-10-13 21:10:28,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:28,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:10:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:28,202 INFO L225 Difference]: With dead ends: 1318 [2019-10-13 21:10:28,203 INFO L226 Difference]: Without dead ends: 673 [2019-10-13 21:10:28,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-13 21:10:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-13 21:10:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:10:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1061 transitions. [2019-10-13 21:10:28,268 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1061 transitions. Word has length 118 [2019-10-13 21:10:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:28,269 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1061 transitions. [2019-10-13 21:10:28,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1061 transitions. [2019-10-13 21:10:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:10:28,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:28,278 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] [2019-10-13 21:10:28,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,487 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1168672533, now seen corresponding path program 1 times [2019-10-13 21:10:28,488 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:28,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162725072] [2019-10-13 21:10:28,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,646 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 21:10:28,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162725072] [2019-10-13 21:10:28,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803347829] [2019-10-13 21:10:28,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:29,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:29,339 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 21:10:29,339 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:29,544 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 21:10:29,545 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:29,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:29,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919577483] [2019-10-13 21:10:29,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:29,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:29,548 INFO L87 Difference]: Start difference. First operand 673 states and 1061 transitions. Second operand 4 states. [2019-10-13 21:10:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:29,665 INFO L93 Difference]: Finished difference Result 1318 states and 2095 transitions. [2019-10-13 21:10:29,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:29,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:10:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:29,673 INFO L225 Difference]: With dead ends: 1318 [2019-10-13 21:10:29,673 INFO L226 Difference]: Without dead ends: 673 [2019-10-13 21:10:29,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-13 21:10:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-13 21:10:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:10:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1060 transitions. [2019-10-13 21:10:29,718 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1060 transitions. Word has length 120 [2019-10-13 21:10:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:29,719 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1060 transitions. [2019-10-13 21:10:29,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1060 transitions. [2019-10-13 21:10:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:10:29,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:29,724 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] [2019-10-13 21:10:29,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,936 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2048084753, now seen corresponding path program 1 times [2019-10-13 21:10:29,937 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:29,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120913393] [2019-10-13 21:10:29,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,137 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 21:10:30,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120913393] [2019-10-13 21:10:30,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567964832] [2019-10-13 21:10:30,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:30,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:30,817 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 21:10:30,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:31,047 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 21:10:31,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:31,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:31,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747454698] [2019-10-13 21:10:31,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:31,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:31,050 INFO L87 Difference]: Start difference. First operand 673 states and 1060 transitions. Second operand 4 states. [2019-10-13 21:10:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:31,129 INFO L93 Difference]: Finished difference Result 1325 states and 2102 transitions. [2019-10-13 21:10:31,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:31,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:10:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:31,134 INFO L225 Difference]: With dead ends: 1325 [2019-10-13 21:10:31,135 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:10:31,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:10:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:10:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1072 transitions. [2019-10-13 21:10:31,163 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1072 transitions. Word has length 122 [2019-10-13 21:10:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:31,163 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1072 transitions. [2019-10-13 21:10:31,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1072 transitions. [2019-10-13 21:10:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:10:31,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:31,169 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:31,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:31,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash -712971393, now seen corresponding path program 1 times [2019-10-13 21:10:31,381 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:31,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705411254] [2019-10-13 21:10:31,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,593 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 21:10:31,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705411254] [2019-10-13 21:10:31,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765328739] [2019-10-13 21:10:31,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:32,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:32,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:32,206 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 21:10:32,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:32,416 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 21:10:32,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:32,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:32,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680177749] [2019-10-13 21:10:32,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:32,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:32,419 INFO L87 Difference]: Start difference. First operand 682 states and 1072 transitions. Second operand 4 states. [2019-10-13 21:10:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:32,514 INFO L93 Difference]: Finished difference Result 1327 states and 2103 transitions. [2019-10-13 21:10:32,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:32,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:10:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:32,520 INFO L225 Difference]: With dead ends: 1327 [2019-10-13 21:10:32,520 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:10:32,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:10:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:10:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1071 transitions. [2019-10-13 21:10:32,549 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1071 transitions. Word has length 123 [2019-10-13 21:10:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:32,549 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1071 transitions. [2019-10-13 21:10:32,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1071 transitions. [2019-10-13 21:10:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:10:32,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:32,600 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:32,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,801 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:32,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1947833131, now seen corresponding path program 1 times [2019-10-13 21:10:32,802 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:32,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741843814] [2019-10-13 21:10:32,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:32,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:32,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:32,920 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 21:10:32,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741843814] [2019-10-13 21:10:32,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072464319] [2019-10-13 21:10:32,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:33,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:33,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:33,568 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 21:10:33,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:33,797 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 21:10:33,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:33,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:33,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345242824] [2019-10-13 21:10:33,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:33,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:33,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:33,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:33,802 INFO L87 Difference]: Start difference. First operand 682 states and 1071 transitions. Second operand 4 states. [2019-10-13 21:10:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:33,907 INFO L93 Difference]: Finished difference Result 1327 states and 2102 transitions. [2019-10-13 21:10:33,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:33,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:10:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:33,917 INFO L225 Difference]: With dead ends: 1327 [2019-10-13 21:10:33,918 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:10:33,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:10:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:10:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1070 transitions. [2019-10-13 21:10:33,962 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1070 transitions. Word has length 124 [2019-10-13 21:10:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:33,962 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1070 transitions. [2019-10-13 21:10:33,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1070 transitions. [2019-10-13 21:10:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:10:33,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:33,967 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] [2019-10-13 21:10:34,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:34,185 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1179658819, now seen corresponding path program 1 times [2019-10-13 21:10:34,186 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:34,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984993024] [2019-10-13 21:10:34,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:34,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:34,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,379 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 21:10:34,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984993024] [2019-10-13 21:10:34,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852408759] [2019-10-13 21:10:34,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:35,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:35,124 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 21:10:35,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:35,331 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 21:10:35,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:35,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:35,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272219206] [2019-10-13 21:10:35,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:35,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:35,333 INFO L87 Difference]: Start difference. First operand 682 states and 1070 transitions. Second operand 4 states. [2019-10-13 21:10:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:35,528 INFO L93 Difference]: Finished difference Result 1326 states and 2102 transitions. [2019-10-13 21:10:35,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:35,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:10:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:35,534 INFO L225 Difference]: With dead ends: 1326 [2019-10-13 21:10:35,534 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:10:35,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:10:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:10:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-10-13 21:10:35,566 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 125 [2019-10-13 21:10:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:35,567 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-10-13 21:10:35,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-10-13 21:10:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:35,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:35,569 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:35,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,787 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1513989099, now seen corresponding path program 1 times [2019-10-13 21:10:35,788 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:35,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493306845] [2019-10-13 21:10:35,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:35,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493306845] [2019-10-13 21:10:35,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865860282] [2019-10-13 21:10:35,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:36,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:36,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:36,697 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:36,904 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:36,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:36,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859241195] [2019-10-13 21:10:36,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:36,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:36,906 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 4 states. [2019-10-13 21:10:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:37,094 INFO L93 Difference]: Finished difference Result 1326 states and 2092 transitions. [2019-10-13 21:10:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:37,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:37,100 INFO L225 Difference]: With dead ends: 1326 [2019-10-13 21:10:37,101 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 21:10:37,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 21:10:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 21:10:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1060 transitions. [2019-10-13 21:10:37,136 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1060 transitions. Word has length 127 [2019-10-13 21:10:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:37,136 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1060 transitions. [2019-10-13 21:10:37,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1060 transitions. [2019-10-13 21:10:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:37,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:37,139 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] [2019-10-13 21:10:37,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:37,347 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1252577017, now seen corresponding path program 1 times [2019-10-13 21:10:37,348 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:37,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693574767] [2019-10-13 21:10:37,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,349 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:37,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693574767] [2019-10-13 21:10:37,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495042403] [2019-10-13 21:10:37,520 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 21:10:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:38,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:38,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:38,308 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:38,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:38,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:38,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692388169] [2019-10-13 21:10:38,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:38,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:38,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:38,555 INFO L87 Difference]: Start difference. First operand 682 states and 1060 transitions. Second operand 4 states. [2019-10-13 21:10:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:38,800 INFO L93 Difference]: Finished difference Result 1362 states and 2141 transitions. [2019-10-13 21:10:38,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:38,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:38,806 INFO L225 Difference]: With dead ends: 1362 [2019-10-13 21:10:38,807 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:10:38,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:10:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-13 21:10:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1124 transitions. [2019-10-13 21:10:38,833 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1124 transitions. Word has length 129 [2019-10-13 21:10:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:38,833 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1124 transitions. [2019-10-13 21:10:38,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1124 transitions. [2019-10-13 21:10:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:38,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:38,837 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] [2019-10-13 21:10:39,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:39,046 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash -402045729, now seen corresponding path program 1 times [2019-10-13 21:10:39,047 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:39,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692032309] [2019-10-13 21:10:39,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:39,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692032309] [2019-10-13 21:10:39,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846638435] [2019-10-13 21:10:39,267 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 21:10:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:39,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:40,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:40,211 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:40,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:40,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636717238] [2019-10-13 21:10:40,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:40,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:40,213 INFO L87 Difference]: Start difference. First operand 721 states and 1124 transitions. Second operand 4 states. [2019-10-13 21:10:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:40,492 INFO L93 Difference]: Finished difference Result 1365 states and 2144 transitions. [2019-10-13 21:10:40,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:40,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:40,498 INFO L225 Difference]: With dead ends: 1365 [2019-10-13 21:10:40,498 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:10:40,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:10:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-13 21:10:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-13 21:10:40,532 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 130 [2019-10-13 21:10:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:40,534 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-13 21:10:40,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-13 21:10:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:40,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:40,537 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] [2019-10-13 21:10:40,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,746 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1281147742, now seen corresponding path program 1 times [2019-10-13 21:10:40,747 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:40,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009052340] [2019-10-13 21:10:40,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,876 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 21:10:40,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009052340] [2019-10-13 21:10:40,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045680077] [2019-10-13 21:10:40,877 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 21:10:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:41,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:41,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:41,613 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 21:10:41,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:42,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:42,095 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 21:10:42,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:42,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:42,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083074091] [2019-10-13 21:10:42,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:42,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:42,098 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 9 states. [2019-10-13 21:10:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:42,321 INFO L93 Difference]: Finished difference Result 1378 states and 2158 transitions. [2019-10-13 21:10:42,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:42,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:42,327 INFO L225 Difference]: With dead ends: 1378 [2019-10-13 21:10:42,327 INFO L226 Difference]: Without dead ends: 737 [2019-10-13 21:10:42,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 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 21:10:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-13 21:10:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 730. [2019-10-13 21:10:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-13 21:10:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1132 transitions. [2019-10-13 21:10:42,356 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1132 transitions. Word has length 130 [2019-10-13 21:10:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:42,356 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1132 transitions. [2019-10-13 21:10:42,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1132 transitions. [2019-10-13 21:10:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:42,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:42,359 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] [2019-10-13 21:10:42,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,568 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2030394411, now seen corresponding path program 1 times [2019-10-13 21:10:42,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:42,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617763167] [2019-10-13 21:10:42,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:42,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617763167] [2019-10-13 21:10:42,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509900311] [2019-10-13 21:10:42,716 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 21:10:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:43,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:43,613 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:43,806 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:43,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:43,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107141354] [2019-10-13 21:10:43,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:43,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:43,808 INFO L87 Difference]: Start difference. First operand 730 states and 1132 transitions. Second operand 4 states. [2019-10-13 21:10:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:44,008 INFO L93 Difference]: Finished difference Result 1379 states and 2161 transitions. [2019-10-13 21:10:44,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:44,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-13 21:10:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:44,013 INFO L225 Difference]: With dead ends: 1379 [2019-10-13 21:10:44,014 INFO L226 Difference]: Without dead ends: 730 [2019-10-13 21:10:44,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2019-10-13 21:10:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2019-10-13 21:10:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-13 21:10:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1127 transitions. [2019-10-13 21:10:44,053 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1127 transitions. Word has length 131 [2019-10-13 21:10:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:44,054 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1127 transitions. [2019-10-13 21:10:44,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1127 transitions. [2019-10-13 21:10:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:44,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:44,057 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] [2019-10-13 21:10:44,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:44,265 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 471660285, now seen corresponding path program 1 times [2019-10-13 21:10:44,266 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:44,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656189857] [2019-10-13 21:10:44,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:44,364 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 21:10:44,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656189857] [2019-10-13 21:10:44,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062325963] [2019-10-13 21:10:44,365 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 21:10:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:45,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:45,070 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 21:10:45,070 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:45,376 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 21:10:45,377 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:45,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:45,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500243835] [2019-10-13 21:10:45,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:45,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:45,379 INFO L87 Difference]: Start difference. First operand 730 states and 1127 transitions. Second operand 11 states. [2019-10-13 21:10:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:45,582 INFO L93 Difference]: Finished difference Result 1316 states and 2055 transitions. [2019-10-13 21:10:45,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:45,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:45,588 INFO L225 Difference]: With dead ends: 1316 [2019-10-13 21:10:45,588 INFO L226 Difference]: Without dead ends: 747 [2019-10-13 21:10:45,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2019-10-13 21:10:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 737. [2019-10-13 21:10:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-13 21:10:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1137 transitions. [2019-10-13 21:10:45,619 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1137 transitions. Word has length 130 [2019-10-13 21:10:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:45,619 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 1137 transitions. [2019-10-13 21:10:45,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1137 transitions. [2019-10-13 21:10:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:45,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:45,622 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] [2019-10-13 21:10:45,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,830 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -542214372, now seen corresponding path program 1 times [2019-10-13 21:10:45,832 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:45,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538796344] [2019-10-13 21:10:45,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,922 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 21:10:45,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538796344] [2019-10-13 21:10:45,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432810538] [2019-10-13 21:10:45,923 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 21:10:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:46,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:46,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:46,686 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 21:10:46,687 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:47,008 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 21:10:47,009 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:47,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:47,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875319734] [2019-10-13 21:10:47,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:47,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:47,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:47,011 INFO L87 Difference]: Start difference. First operand 737 states and 1137 transitions. Second operand 8 states. [2019-10-13 21:10:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:47,142 INFO L93 Difference]: Finished difference Result 1320 states and 2064 transitions. [2019-10-13 21:10:47,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:47,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-13 21:10:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:47,148 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 21:10:47,148 INFO L226 Difference]: Without dead ends: 751 [2019-10-13 21:10:47,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 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 21:10:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-13 21:10:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 744. [2019-10-13 21:10:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 21:10:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-10-13 21:10:47,180 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-10-13 21:10:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:47,181 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-10-13 21:10:47,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-10-13 21:10:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:47,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:47,184 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] [2019-10-13 21:10:47,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:47,395 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1768114844, now seen corresponding path program 1 times [2019-10-13 21:10:47,396 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:47,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241525167] [2019-10-13 21:10:47,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:47,483 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 21:10:47,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241525167] [2019-10-13 21:10:47,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689404368] [2019-10-13 21:10:47,484 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 21:10:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:48,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:48,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:48,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:48,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:48,862 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:48,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:48,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86008232] [2019-10-13 21:10:48,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:48,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:48,865 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 14 states. [2019-10-13 21:10:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:49,116 INFO L93 Difference]: Finished difference Result 1321 states and 2064 transitions. [2019-10-13 21:10:49,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:49,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-13 21:10:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:49,122 INFO L225 Difference]: With dead ends: 1321 [2019-10-13 21:10:49,122 INFO L226 Difference]: Without dead ends: 752 [2019-10-13 21:10:49,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 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 21:10:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-13 21:10:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2019-10-13 21:10:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 21:10:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-10-13 21:10:49,163 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-10-13 21:10:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:49,166 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-10-13 21:10:49,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-10-13 21:10:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:49,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:49,169 INFO L380 BasicCegarLoop]: trace histogram [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 21:10:49,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:49,375 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:49,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813212, now seen corresponding path program 1 times [2019-10-13 21:10:49,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:49,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428781510] [2019-10-13 21:10:49,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:49,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:49,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:49,474 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 21:10:49,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428781510] [2019-10-13 21:10:49,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699942955] [2019-10-13 21:10:49,475 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 21:10:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:50,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:50,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:50,235 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:50,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:50,664 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:50,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:50,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448127970] [2019-10-13 21:10:50,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:50,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:50,666 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 11 states. [2019-10-13 21:10:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:50,867 INFO L93 Difference]: Finished difference Result 1322 states and 2072 transitions. [2019-10-13 21:10:50,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:50,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-13 21:10:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:50,873 INFO L225 Difference]: With dead ends: 1322 [2019-10-13 21:10:50,874 INFO L226 Difference]: Without dead ends: 753 [2019-10-13 21:10:50,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 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 21:10:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-10-13 21:10:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 746. [2019-10-13 21:10:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 21:10:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1154 transitions. [2019-10-13 21:10:50,902 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1154 transitions. Word has length 134 [2019-10-13 21:10:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:50,903 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1154 transitions. [2019-10-13 21:10:50,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1154 transitions. [2019-10-13 21:10:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:50,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:50,905 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] [2019-10-13 21:10:51,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:51,114 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -830897423, now seen corresponding path program 1 times [2019-10-13 21:10:51,115 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:51,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046241819] [2019-10-13 21:10:51,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:51,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:51,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:51,200 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 21:10:51,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046241819] [2019-10-13 21:10:51,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045240612] [2019-10-13 21:10:51,201 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 21:10:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:51,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:51,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:51,984 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 21:10:51,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:52,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:52,262 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 21:10:52,263 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:52,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:52,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589952571] [2019-10-13 21:10:52,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:52,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:52,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:52,264 INFO L87 Difference]: Start difference. First operand 746 states and 1154 transitions. Second operand 9 states. [2019-10-13 21:10:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:52,389 INFO L93 Difference]: Finished difference Result 1418 states and 2237 transitions. [2019-10-13 21:10:52,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:52,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:52,395 INFO L225 Difference]: With dead ends: 1418 [2019-10-13 21:10:52,395 INFO L226 Difference]: Without dead ends: 755 [2019-10-13 21:10:52,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-10-13 21:10:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 753. [2019-10-13 21:10:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-10-13 21:10:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1162 transitions. [2019-10-13 21:10:52,427 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1162 transitions. Word has length 133 [2019-10-13 21:10:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:52,427 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1162 transitions. [2019-10-13 21:10:52,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1162 transitions. [2019-10-13 21:10:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:52,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:52,430 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:52,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:52,640 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1683046364, now seen corresponding path program 1 times [2019-10-13 21:10:52,641 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:52,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766724267] [2019-10-13 21:10:52,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:52,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:52,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:52,723 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 21:10:52,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766724267] [2019-10-13 21:10:52,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669887830] [2019-10-13 21:10:52,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 21:10:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:53,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:53,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:53,557 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:53,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:53,819 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:53,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:53,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250655564] [2019-10-13 21:10:53,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:53,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:53,820 INFO L87 Difference]: Start difference. First operand 753 states and 1162 transitions. Second operand 8 states. [2019-10-13 21:10:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:53,960 INFO L93 Difference]: Finished difference Result 1432 states and 2248 transitions. [2019-10-13 21:10:53,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:53,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-13 21:10:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:53,966 INFO L225 Difference]: With dead ends: 1432 [2019-10-13 21:10:53,967 INFO L226 Difference]: Without dead ends: 762 [2019-10-13 21:10:53,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-13 21:10:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 757. [2019-10-13 21:10:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2019-10-13 21:10:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1168 transitions. [2019-10-13 21:10:54,000 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1168 transitions. Word has length 136 [2019-10-13 21:10:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:54,001 INFO L462 AbstractCegarLoop]: Abstraction has 757 states and 1168 transitions. [2019-10-13 21:10:54,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1168 transitions. [2019-10-13 21:10:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:10:54,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:54,007 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:54,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:54,215 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1774892016, now seen corresponding path program 1 times [2019-10-13 21:10:54,216 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:54,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648148931] [2019-10-13 21:10:54,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:54,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:54,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:54,327 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 21:10:54,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648148931] [2019-10-13 21:10:54,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279438704] [2019-10-13 21:10:54,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true