java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:29,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:29,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:29,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:29,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:29,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:29,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:29,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:29,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:29,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:29,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:29,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:29,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:29,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:29,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:29,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:29,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:29,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:29,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:29,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:29,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:29,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:29,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:29,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:29,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:29,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:29,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:29,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:29,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:29,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:29,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:29,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:29,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:29,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:29,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:29,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:29,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:29,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:29,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:29,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:29,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:29,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:29,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:29,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:29,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:29,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:29,445 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:29,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:29,446 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:29,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:29,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:29,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:29,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:29,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:29,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:29,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:29,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:29,448 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:29,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:29,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:29,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:29,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:29,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:29,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:29,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:29,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:29,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:29,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:29,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:29,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:29,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:29,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:29,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:29,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:29,755 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:29,756 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:29,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-10-13 21:08:29,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162e32b5/d65bb94f1fd84591bd06509b4da1ed74/FLAG7bf7e412e [2019-10-13 21:08:30,526 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:30,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-10-13 21:08:30,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162e32b5/d65bb94f1fd84591bd06509b4da1ed74/FLAG7bf7e412e [2019-10-13 21:08:30,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3162e32b5/d65bb94f1fd84591bd06509b4da1ed74 [2019-10-13 21:08:30,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:30,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:30,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:30,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:30,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:30,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:30" (1/1) ... [2019-10-13 21:08:30,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee9cbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:30, skipping insertion in model container [2019-10-13 21:08:30,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:30" (1/1) ... [2019-10-13 21:08:30,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:30,888 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:31,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:31,601 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:31,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:31,856 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:31,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31 WrapperNode [2019-10-13 21:08:31,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:31,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:31,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:31,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:31,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:32,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:32,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:32,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:32,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:32,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:32,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:32,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:32,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:32,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:32,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:32,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:32,176 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:32,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:32,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:32,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:32,178 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:32,178 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:32,182 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:32,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:32,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:32,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:32,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:32,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:32,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:32,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:32,193 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:32,194 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:32,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:32,194 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:32,194 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:32,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:32,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:32,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:32,196 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:32,196 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:32,196 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:32,198 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:08:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:08:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:32,210 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:32,217 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:32,217 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:32,217 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:32,219 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:34,436 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:34,436 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:34,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:34 BoogieIcfgContainer [2019-10-13 21:08:34,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:34,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:34,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:34,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:34,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:30" (1/3) ... [2019-10-13 21:08:34,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cc47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:34, skipping insertion in model container [2019-10-13 21:08:34,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (2/3) ... [2019-10-13 21:08:34,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cc47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:34, skipping insertion in model container [2019-10-13 21:08:34,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:34" (3/3) ... [2019-10-13 21:08:34,448 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2019-10-13 21:08:34,459 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:34,469 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:34,481 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:34,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:34,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:34,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:34,528 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:34,528 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:34,528 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:34,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:34,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states. [2019-10-13 21:08:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:34,613 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:34,615 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:34,617 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1416283797, now seen corresponding path program 1 times [2019-10-13 21:08:34,634 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:34,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070895946] [2019-10-13 21:08:34,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:34,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:34,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:35,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070895946] [2019-10-13 21:08:35,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188259490] [2019-10-13 21:08:35,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:35,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:08:35,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:36,010 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:36,164 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:36,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-13 21:08:36,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585793594] [2019-10-13 21:08:36,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:08:36,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:08:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:36,190 INFO L87 Difference]: Start difference. First operand 816 states. Second operand 2 states. [2019-10-13 21:08:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:36,352 INFO L93 Difference]: Finished difference Result 1325 states and 2137 transitions. [2019-10-13 21:08:36,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:08:36,354 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 161 [2019-10-13 21:08:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:36,393 INFO L225 Difference]: With dead ends: 1325 [2019-10-13 21:08:36,393 INFO L226 Difference]: Without dead ends: 670 [2019-10-13 21:08:36,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-10-13 21:08:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2019-10-13 21:08:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-10-13 21:08:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1060 transitions. [2019-10-13 21:08:36,524 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1060 transitions. Word has length 161 [2019-10-13 21:08:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:36,526 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1060 transitions. [2019-10-13 21:08:36,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:08:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1060 transitions. [2019-10-13 21:08:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:36,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:36,541 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:36,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:36,742 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2071718859, now seen corresponding path program 1 times [2019-10-13 21:08:36,743 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:36,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715061579] [2019-10-13 21:08:36,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:36,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715061579] [2019-10-13 21:08:36,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884204389] [2019-10-13 21:08:36,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:37,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:37,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:37,655 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:37,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:37,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:37,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531591845] [2019-10-13 21:08:37,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:37,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:37,828 INFO L87 Difference]: Start difference. First operand 670 states and 1060 transitions. Second operand 4 states. [2019-10-13 21:08:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:37,949 INFO L93 Difference]: Finished difference Result 1323 states and 2110 transitions. [2019-10-13 21:08:37,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:37,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 21:08:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:37,955 INFO L225 Difference]: With dead ends: 1323 [2019-10-13 21:08:37,955 INFO L226 Difference]: Without dead ends: 679 [2019-10-13 21:08:37,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-13 21:08:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2019-10-13 21:08:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-13 21:08:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1074 transitions. [2019-10-13 21:08:38,005 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1074 transitions. Word has length 161 [2019-10-13 21:08:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:38,006 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1074 transitions. [2019-10-13 21:08:38,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1074 transitions. [2019-10-13 21:08:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:08:38,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:38,018 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:38,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:38,225 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1394548635, now seen corresponding path program 1 times [2019-10-13 21:08:38,226 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:38,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88589013] [2019-10-13 21:08:38,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:38,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88589013] [2019-10-13 21:08:38,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661690045] [2019-10-13 21:08:38,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:38,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:38,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:39,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:39,343 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:39,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:39,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048890856] [2019-10-13 21:08:39,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:39,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:39,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:39,345 INFO L87 Difference]: Start difference. First operand 679 states and 1074 transitions. Second operand 7 states. [2019-10-13 21:08:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:39,538 INFO L93 Difference]: Finished difference Result 1341 states and 2135 transitions. [2019-10-13 21:08:39,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:39,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-10-13 21:08:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:39,546 INFO L225 Difference]: With dead ends: 1341 [2019-10-13 21:08:39,546 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:08:39,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:08:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 686. [2019-10-13 21:08:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-10-13 21:08:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1086 transitions. [2019-10-13 21:08:39,598 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1086 transitions. Word has length 163 [2019-10-13 21:08:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:39,600 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1086 transitions. [2019-10-13 21:08:39,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1086 transitions. [2019-10-13 21:08:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:08:39,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:39,607 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:39,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:39,819 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash -146815623, now seen corresponding path program 1 times [2019-10-13 21:08:39,820 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:39,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165772911] [2019-10-13 21:08:39,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:39,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:39,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:39,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165772911] [2019-10-13 21:08:39,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168090397] [2019-10-13 21:08:39,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:40,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:40,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:40,564 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:40,723 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:40,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:40,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453402734] [2019-10-13 21:08:40,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:40,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:40,727 INFO L87 Difference]: Start difference. First operand 686 states and 1086 transitions. Second operand 4 states. [2019-10-13 21:08:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:40,818 INFO L93 Difference]: Finished difference Result 1357 states and 2160 transitions. [2019-10-13 21:08:40,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:40,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-13 21:08:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:40,824 INFO L225 Difference]: With dead ends: 1357 [2019-10-13 21:08:40,824 INFO L226 Difference]: Without dead ends: 697 [2019-10-13 21:08:40,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-13 21:08:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2019-10-13 21:08:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-13 21:08:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1094 transitions. [2019-10-13 21:08:40,856 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1094 transitions. Word has length 164 [2019-10-13 21:08:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:40,857 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1094 transitions. [2019-10-13 21:08:40,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1094 transitions. [2019-10-13 21:08:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:08:40,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:40,863 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:41,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,071 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:41,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1430842587, now seen corresponding path program 1 times [2019-10-13 21:08:41,072 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:41,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383870019] [2019-10-13 21:08:41,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:41,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383870019] [2019-10-13 21:08:41,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684655501] [2019-10-13 21:08:41,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:41,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:41,851 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:42,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:42,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:42,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904308967] [2019-10-13 21:08:42,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:42,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:42,092 INFO L87 Difference]: Start difference. First operand 695 states and 1094 transitions. Second operand 7 states. [2019-10-13 21:08:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:42,230 INFO L93 Difference]: Finished difference Result 1358 states and 2151 transitions. [2019-10-13 21:08:42,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:42,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2019-10-13 21:08:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:42,236 INFO L225 Difference]: With dead ends: 1358 [2019-10-13 21:08:42,236 INFO L226 Difference]: Without dead ends: 704 [2019-10-13 21:08:42,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-13 21:08:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 695. [2019-10-13 21:08:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-13 21:08:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1094 transitions. [2019-10-13 21:08:42,270 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1094 transitions. Word has length 164 [2019-10-13 21:08:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:42,271 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1094 transitions. [2019-10-13 21:08:42,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1094 transitions. [2019-10-13 21:08:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:08:42,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:42,277 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:42,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:42,485 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash -907404626, now seen corresponding path program 1 times [2019-10-13 21:08:42,486 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:42,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477802339] [2019-10-13 21:08:42,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:42,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:42,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:42,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477802339] [2019-10-13 21:08:42,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196821052] [2019-10-13 21:08:42,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:43,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:43,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:43,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:43,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:43,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366842554] [2019-10-13 21:08:43,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:43,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:43,593 INFO L87 Difference]: Start difference. First operand 695 states and 1094 transitions. Second operand 4 states. [2019-10-13 21:08:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:43,841 INFO L93 Difference]: Finished difference Result 1391 states and 2221 transitions. [2019-10-13 21:08:43,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:43,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-13 21:08:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:43,852 INFO L225 Difference]: With dead ends: 1391 [2019-10-13 21:08:43,852 INFO L226 Difference]: Without dead ends: 737 [2019-10-13 21:08:43,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-13 21:08:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 734. [2019-10-13 21:08:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:08:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1167 transitions. [2019-10-13 21:08:43,889 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1167 transitions. Word has length 167 [2019-10-13 21:08:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:43,890 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1167 transitions. [2019-10-13 21:08:43,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1167 transitions. [2019-10-13 21:08:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:08:43,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:43,896 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:44,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:44,111 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -548552272, now seen corresponding path program 1 times [2019-10-13 21:08:44,112 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:44,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743509507] [2019-10-13 21:08:44,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:44,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743509507] [2019-10-13 21:08:44,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300031009] [2019-10-13 21:08:44,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:44,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:08:44,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:45,102 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:45,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:45,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583747229] [2019-10-13 21:08:45,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:45,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:45,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:45,105 INFO L87 Difference]: Start difference. First operand 734 states and 1167 transitions. Second operand 5 states. [2019-10-13 21:08:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:45,208 INFO L93 Difference]: Finished difference Result 1415 states and 2267 transitions. [2019-10-13 21:08:45,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:45,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-10-13 21:08:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:45,215 INFO L225 Difference]: With dead ends: 1415 [2019-10-13 21:08:45,216 INFO L226 Difference]: Without dead ends: 734 [2019-10-13 21:08:45,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-13 21:08:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-10-13 21:08:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:08:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1162 transitions. [2019-10-13 21:08:45,252 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1162 transitions. Word has length 169 [2019-10-13 21:08:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:45,253 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1162 transitions. [2019-10-13 21:08:45,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1162 transitions. [2019-10-13 21:08:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:08:45,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,260 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:45,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,468 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash -981805208, now seen corresponding path program 1 times [2019-10-13 21:08:45,468 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:45,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884271690] [2019-10-13 21:08:45,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:45,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884271690] [2019-10-13 21:08:45,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273296603] [2019-10-13 21:08:45,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:46,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:46,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:46,541 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:46,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:46,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453081775] [2019-10-13 21:08:46,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:46,545 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:46,546 INFO L87 Difference]: Start difference. First operand 734 states and 1162 transitions. Second operand 11 states. [2019-10-13 21:08:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:46,713 INFO L93 Difference]: Finished difference Result 1389 states and 2208 transitions. [2019-10-13 21:08:46,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:46,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2019-10-13 21:08:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:46,721 INFO L225 Difference]: With dead ends: 1389 [2019-10-13 21:08:46,721 INFO L226 Difference]: Without dead ends: 754 [2019-10-13 21:08:46,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2019-10-13 21:08:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 741. [2019-10-13 21:08:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:08:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1173 transitions. [2019-10-13 21:08:46,763 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1173 transitions. Word has length 170 [2019-10-13 21:08:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:46,764 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1173 transitions. [2019-10-13 21:08:46,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1173 transitions. [2019-10-13 21:08:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:08:46,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:46,771 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:46,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,986 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash -304800936, now seen corresponding path program 1 times [2019-10-13 21:08:46,986 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:46,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510118652] [2019-10-13 21:08:46,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:47,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510118652] [2019-10-13 21:08:47,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651998899] [2019-10-13 21:08:47,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:47,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:47,756 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:48,048 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:48,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:08:48,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215192010] [2019-10-13 21:08:48,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:08:48,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:08:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:48,051 INFO L87 Difference]: Start difference. First operand 741 states and 1173 transitions. Second operand 8 states. [2019-10-13 21:08:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:48,221 INFO L93 Difference]: Finished difference Result 1387 states and 2204 transitions. [2019-10-13 21:08:48,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:48,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 171 [2019-10-13 21:08:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:48,231 INFO L225 Difference]: With dead ends: 1387 [2019-10-13 21:08:48,231 INFO L226 Difference]: Without dead ends: 752 [2019-10-13 21:08:48,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-13 21:08:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 745. [2019-10-13 21:08:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 21:08:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1178 transitions. [2019-10-13 21:08:48,276 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1178 transitions. Word has length 171 [2019-10-13 21:08:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:48,278 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1178 transitions. [2019-10-13 21:08:48,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:08:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1178 transitions. [2019-10-13 21:08:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:08:48,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:48,288 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:48,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,507 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 873328068, now seen corresponding path program 1 times [2019-10-13 21:08:48,508 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:48,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655520325] [2019-10-13 21:08:48,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:48,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655520325] [2019-10-13 21:08:48,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567659886] [2019-10-13 21:08:48,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:49,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:49,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:49,462 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:49,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:49,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868290777] [2019-10-13 21:08:49,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:49,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:49,464 INFO L87 Difference]: Start difference. First operand 745 states and 1178 transitions. Second operand 5 states. [2019-10-13 21:08:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,650 INFO L93 Difference]: Finished difference Result 1425 states and 2281 transitions. [2019-10-13 21:08:49,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:49,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-10-13 21:08:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,657 INFO L225 Difference]: With dead ends: 1425 [2019-10-13 21:08:49,657 INFO L226 Difference]: Without dead ends: 790 [2019-10-13 21:08:49,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2019-10-13 21:08:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2019-10-13 21:08:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-10-13 21:08:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1254 transitions. [2019-10-13 21:08:49,703 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1254 transitions. Word has length 172 [2019-10-13 21:08:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,703 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1254 transitions. [2019-10-13 21:08:49,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1254 transitions. [2019-10-13 21:08:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:08:49,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,712 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:49,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,913 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1863930726, now seen corresponding path program 1 times [2019-10-13 21:08:49,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236887632] [2019-10-13 21:08:49,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:50,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236887632] [2019-10-13 21:08:50,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130207382] [2019-10-13 21:08:50,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:08:50,753 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:50,889 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:50,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:50,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289901191] [2019-10-13 21:08:50,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:50,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:50,890 INFO L87 Difference]: Start difference. First operand 787 states and 1254 transitions. Second operand 6 states. [2019-10-13 21:08:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,975 INFO L93 Difference]: Finished difference Result 1479 states and 2366 transitions. [2019-10-13 21:08:50,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:50,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-10-13 21:08:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,981 INFO L225 Difference]: With dead ends: 1479 [2019-10-13 21:08:50,981 INFO L226 Difference]: Without dead ends: 783 [2019-10-13 21:08:50,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-13 21:08:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 780. [2019-10-13 21:08:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-10-13 21:08:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1241 transitions. [2019-10-13 21:08:51,011 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1241 transitions. Word has length 173 [2019-10-13 21:08:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:51,012 INFO L462 AbstractCegarLoop]: Abstraction has 780 states and 1241 transitions. [2019-10-13 21:08:51,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1241 transitions. [2019-10-13 21:08:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:08:51,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:51,018 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:51,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,226 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1965179543, now seen corresponding path program 1 times [2019-10-13 21:08:51,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:51,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681793325] [2019-10-13 21:08:51,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:51,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681793325] [2019-10-13 21:08:51,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080304763] [2019-10-13 21:08:51,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:52,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:52,286 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:52,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:08:52,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993791074] [2019-10-13 21:08:52,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:52,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:52,289 INFO L87 Difference]: Start difference. First operand 780 states and 1241 transitions. Second operand 5 states. [2019-10-13 21:08:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,180 INFO L93 Difference]: Finished difference Result 1419 states and 2295 transitions. [2019-10-13 21:08:53,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:08:53,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-10-13 21:08:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,186 INFO L225 Difference]: With dead ends: 1419 [2019-10-13 21:08:53,186 INFO L226 Difference]: Without dead ends: 788 [2019-10-13 21:08:53,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:08:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2019-10-13 21:08:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2019-10-13 21:08:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-10-13 21:08:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1254 transitions. [2019-10-13 21:08:53,217 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1254 transitions. Word has length 174 [2019-10-13 21:08:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,217 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1254 transitions. [2019-10-13 21:08:53,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1254 transitions. [2019-10-13 21:08:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:08:53,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,224 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:53,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,432 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash -97511625, now seen corresponding path program 1 times [2019-10-13 21:08:53,433 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918220763] [2019-10-13 21:08:53,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:08:53,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918220763] [2019-10-13 21:08:53,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120401791] [2019-10-13 21:08:53,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:54,208 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:54,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:54,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:08:54,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884277272] [2019-10-13 21:08:54,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:54,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:54,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:54,586 INFO L87 Difference]: Start difference. First operand 788 states and 1254 transitions. Second operand 5 states. [2019-10-13 21:08:55,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,519 INFO L93 Difference]: Finished difference Result 1435 states and 2318 transitions. [2019-10-13 21:08:55,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:08:55,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-10-13 21:08:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,530 INFO L225 Difference]: With dead ends: 1435 [2019-10-13 21:08:55,530 INFO L226 Difference]: Without dead ends: 796 [2019-10-13 21:08:55,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:08:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2019-10-13 21:08:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2019-10-13 21:08:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-10-13 21:08:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1267 transitions. [2019-10-13 21:08:55,562 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1267 transitions. Word has length 176 [2019-10-13 21:08:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,562 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1267 transitions. [2019-10-13 21:08:55,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1267 transitions. [2019-10-13 21:08:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:08:55,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,568 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:55,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,780 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash 654361559, now seen corresponding path program 1 times [2019-10-13 21:08:55,780 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244064654] [2019-10-13 21:08:55,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:55,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244064654] [2019-10-13 21:08:55,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15662533] [2019-10-13 21:08:55,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:08:56,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:56,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:56,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:56,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:08:56,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622627090] [2019-10-13 21:08:56,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:56,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:56,817 INFO L87 Difference]: Start difference. First operand 796 states and 1267 transitions. Second operand 5 states. [2019-10-13 21:08:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,735 INFO L93 Difference]: Finished difference Result 1451 states and 2341 transitions. [2019-10-13 21:08:57,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:08:57,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-10-13 21:08:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:57,740 INFO L225 Difference]: With dead ends: 1451 [2019-10-13 21:08:57,740 INFO L226 Difference]: Without dead ends: 804 [2019-10-13 21:08:57,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:08:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-10-13 21:08:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2019-10-13 21:08:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-10-13 21:08:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1280 transitions. [2019-10-13 21:08:57,768 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1280 transitions. Word has length 178 [2019-10-13 21:08:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:57,769 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1280 transitions. [2019-10-13 21:08:57,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1280 transitions. [2019-10-13 21:08:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:08:57,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:57,774 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:57,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,981 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -946321425, now seen corresponding path program 1 times [2019-10-13 21:08:57,982 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:57,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536912067] [2019-10-13 21:08:57,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:08:58,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536912067] [2019-10-13 21:08:58,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725328939] [2019-10-13 21:08:58,095 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 21:08:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:08:58,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:58,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:08:59,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:59,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 21:08:59,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126752413] [2019-10-13 21:08:59,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:59,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:59,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:59,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:59,030 INFO L87 Difference]: Start difference. First operand 804 states and 1280 transitions. Second operand 5 states. [2019-10-13 21:08:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,921 INFO L93 Difference]: Finished difference Result 1467 states and 2364 transitions. [2019-10-13 21:08:59,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:08:59,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-10-13 21:08:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,928 INFO L225 Difference]: With dead ends: 1467 [2019-10-13 21:08:59,928 INFO L226 Difference]: Without dead ends: 812 [2019-10-13 21:08:59,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-10-13 21:08:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2019-10-13 21:08:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-10-13 21:08:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1293 transitions. [2019-10-13 21:08:59,957 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1293 transitions. Word has length 180 [2019-10-13 21:08:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,957 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1293 transitions. [2019-10-13 21:08:59,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1293 transitions. [2019-10-13 21:08:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:08:59,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,963 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:00,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,170 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash 701367063, now seen corresponding path program 1 times [2019-10-13 21:09:00,171 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:00,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336308526] [2019-10-13 21:09:00,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:00,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336308526] [2019-10-13 21:09:00,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036361029] [2019-10-13 21:09:00,264 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 21:09:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3016 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:09:00,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:01,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:01,119 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:01,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:09:01,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746595342] [2019-10-13 21:09:01,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:01,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:01,121 INFO L87 Difference]: Start difference. First operand 812 states and 1293 transitions. Second operand 4 states. [2019-10-13 21:09:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:01,180 INFO L93 Difference]: Finished difference Result 1583 states and 2542 transitions. [2019-10-13 21:09:01,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:01,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-13 21:09:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:01,185 INFO L225 Difference]: With dead ends: 1583 [2019-10-13 21:09:01,185 INFO L226 Difference]: Without dead ends: 789 [2019-10-13 21:09:01,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2019-10-13 21:09:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2019-10-13 21:09:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-10-13 21:09:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1250 transitions. [2019-10-13 21:09:01,213 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1250 transitions. Word has length 182 [2019-10-13 21:09:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:01,214 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1250 transitions. [2019-10-13 21:09:01,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1250 transitions. [2019-10-13 21:09:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:09:01,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:01,220 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:01,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,427 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:01,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1148401564, now seen corresponding path program 1 times [2019-10-13 21:09:01,428 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:01,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580296897] [2019-10-13 21:09:01,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:01,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580296897] [2019-10-13 21:09:01,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557880642] [2019-10-13 21:09:01,556 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 21:09:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 3015 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:02,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:02,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:02,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:02,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:09:02,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152732014] [2019-10-13 21:09:02,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:02,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:02,494 INFO L87 Difference]: Start difference. First operand 789 states and 1250 transitions. Second operand 7 states. [2019-10-13 21:09:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:02,613 INFO L93 Difference]: Finished difference Result 1532 states and 2435 transitions. [2019-10-13 21:09:02,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:02,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-10-13 21:09:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:02,619 INFO L225 Difference]: With dead ends: 1532 [2019-10-13 21:09:02,619 INFO L226 Difference]: Without dead ends: 791 [2019-10-13 21:09:02,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2019-10-13 21:09:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 783. [2019-10-13 21:09:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-10-13 21:09:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1236 transitions. [2019-10-13 21:09:02,647 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1236 transitions. Word has length 180 [2019-10-13 21:09:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:02,647 INFO L462 AbstractCegarLoop]: Abstraction has 783 states and 1236 transitions. [2019-10-13 21:09:02,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1236 transitions. [2019-10-13 21:09:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:09:02,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:02,651 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:02,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,860 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash 611509978, now seen corresponding path program 1 times [2019-10-13 21:09:02,860 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:02,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890512179] [2019-10-13 21:09:02,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:02,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890512179] [2019-10-13 21:09:02,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739941887] [2019-10-13 21:09:02,973 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 21:09:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 3011 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:03,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:03,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:04,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:09:04,138 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:04,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:04,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888246882] [2019-10-13 21:09:04,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:04,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:04,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:04,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:04,140 INFO L87 Difference]: Start difference. First operand 783 states and 1236 transitions. Second operand 9 states. [2019-10-13 21:09:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:04,350 INFO L93 Difference]: Finished difference Result 1529 states and 2427 transitions. [2019-10-13 21:09:04,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:04,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2019-10-13 21:09:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:04,358 INFO L225 Difference]: With dead ends: 1529 [2019-10-13 21:09:04,358 INFO L226 Difference]: Without dead ends: 795 [2019-10-13 21:09:04,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 345 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-10-13 21:09:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 785. [2019-10-13 21:09:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2019-10-13 21:09:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1240 transitions. [2019-10-13 21:09:04,387 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1240 transitions. Word has length 180 [2019-10-13 21:09:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,388 INFO L462 AbstractCegarLoop]: Abstraction has 785 states and 1240 transitions. [2019-10-13 21:09:04,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1240 transitions. [2019-10-13 21:09:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:09:04,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,393 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:04,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:04,609 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1689449644, now seen corresponding path program 1 times [2019-10-13 21:09:04,610 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:04,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324233270] [2019-10-13 21:09:04,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:04,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324233270] [2019-10-13 21:09:04,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097557259] [2019-10-13 21:09:04,728 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 [2019-10-13 21:09:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:05,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:05,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:05,521 INFO L321 TraceCheckSpWp]: Computing backward predicates...