java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:46,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:46,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:46,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:46,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:46,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:46,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:46,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:46,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:46,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:46,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:46,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:46,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:46,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:46,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:46,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:46,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:46,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:46,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:46,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:46,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:46,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:46,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:46,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:46,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:46,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:46,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:46,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:46,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:46,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:46,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:46,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:46,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:46,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:46,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:46,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:46,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:46,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:46,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:46,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:46,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:46,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:08:46,405 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:46,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:46,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:46,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:46,407 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:46,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:46,408 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:46,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:46,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:46,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:46,409 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:46,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:46,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:46,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:46,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:46,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:46,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:46,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:46,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:46,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:46,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:46,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:46,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:46,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:08:46,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:46,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:46,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:46,731 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:46,732 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:46,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-10-15 01:08:46,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787f8a11f/b3dcae20511d4849b2794d0419434ca4/FLAGee16f84ec [2019-10-15 01:08:47,544 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:47,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-10-15 01:08:47,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787f8a11f/b3dcae20511d4849b2794d0419434ca4/FLAGee16f84ec [2019-10-15 01:08:47,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787f8a11f/b3dcae20511d4849b2794d0419434ca4 [2019-10-15 01:08:47,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:47,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:47,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:47,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:47,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:47,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e788b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47, skipping insertion in model container [2019-10-15 01:08:47,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,708 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:47,791 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:48,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:48,476 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:48,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:48,683 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:48,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48 WrapperNode [2019-10-15 01:08:48,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:48,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:48,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:48,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:48,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... [2019-10-15 01:08:48,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:48,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:48,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:48,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:48,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:49,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:49,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:49,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:49,008 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:49,008 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:49,011 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:49,011 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:49,011 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:49,012 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:49,013 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:49,013 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:49,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:49,017 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:49,018 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:49,021 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:49,033 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:49,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:49,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:49,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:49,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:49,059 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:49,060 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:49,060 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:49,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:51,878 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:51,878 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:51,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:51 BoogieIcfgContainer [2019-10-15 01:08:51,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:51,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:51,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:51,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:51,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:47" (1/3) ... [2019-10-15 01:08:51,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1cde6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:51, skipping insertion in model container [2019-10-15 01:08:51,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:48" (2/3) ... [2019-10-15 01:08:51,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1cde6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:51, skipping insertion in model container [2019-10-15 01:08:51,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:51" (3/3) ... [2019-10-15 01:08:51,891 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2019-10-15 01:08:51,900 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:51,911 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:51,922 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:51,963 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:51,963 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:51,963 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:51,963 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:51,963 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:51,964 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:51,964 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:51,964 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 01:08:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:08:52,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,054 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:52,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1975081631, now seen corresponding path program 1 times [2019-10-15 01:08:52,077 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:52,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491162534] [2019-10-15 01:08:52,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,078 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:52,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491162534] [2019-10-15 01:08:52,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611044914] [2019-10-15 01:08:52,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:53,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:08:53,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:08:53,971 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:53,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:53,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483333917] [2019-10-15 01:08:53,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:53,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:54,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:54,007 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 2 states. [2019-10-15 01:08:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:54,138 INFO L93 Difference]: Finished difference Result 657 states and 1045 transitions. [2019-10-15 01:08:54,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:54,140 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-10-15 01:08:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:54,178 INFO L225 Difference]: With dead ends: 657 [2019-10-15 01:08:54,178 INFO L226 Difference]: Without dead ends: 620 [2019-10-15 01:08:54,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-15 01:08:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-15 01:08:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-15 01:08:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 990 transitions. [2019-10-15 01:08:54,317 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 990 transitions. Word has length 155 [2019-10-15 01:08:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:54,320 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 990 transitions. [2019-10-15 01:08:54,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 990 transitions. [2019-10-15 01:08:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:08:54,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,330 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:54,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:54,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1914277300, now seen corresponding path program 1 times [2019-10-15 01:08:54,541 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:54,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702516375] [2019-10-15 01:08:54,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:54,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702516375] [2019-10-15 01:08:54,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350707643] [2019-10-15 01:08:54,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:55,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:55,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:55,984 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:55,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:55,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385237740] [2019-10-15 01:08:55,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:55,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:55,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:55,991 INFO L87 Difference]: Start difference. First operand 620 states and 990 transitions. Second operand 4 states. [2019-10-15 01:08:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,131 INFO L93 Difference]: Finished difference Result 1212 states and 1953 transitions. [2019-10-15 01:08:56,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:56,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-15 01:08:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:56,140 INFO L225 Difference]: With dead ends: 1212 [2019-10-15 01:08:56,141 INFO L226 Difference]: Without dead ends: 620 [2019-10-15 01:08:56,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-15 01:08:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-15 01:08:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-15 01:08:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 989 transitions. [2019-10-15 01:08:56,190 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 989 transitions. Word has length 157 [2019-10-15 01:08:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:56,191 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 989 transitions. [2019-10-15 01:08:56,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 989 transitions. [2019-10-15 01:08:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 01:08:56,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:56,198 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:56,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:56,413 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash 511513774, now seen corresponding path program 1 times [2019-10-15 01:08:56,414 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:56,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309830580] [2019-10-15 01:08:56,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:56,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309830580] [2019-10-15 01:08:56,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727257387] [2019-10-15 01:08:56,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:57,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:57,381 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:57,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:57,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:57,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074519391] [2019-10-15 01:08:57,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:57,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:57,685 INFO L87 Difference]: Start difference. First operand 620 states and 989 transitions. Second operand 4 states. [2019-10-15 01:08:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,811 INFO L93 Difference]: Finished difference Result 1212 states and 1951 transitions. [2019-10-15 01:08:57,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:57,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-15 01:08:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,819 INFO L225 Difference]: With dead ends: 1212 [2019-10-15 01:08:57,820 INFO L226 Difference]: Without dead ends: 620 [2019-10-15 01:08:57,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-15 01:08:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-15 01:08:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-15 01:08:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 988 transitions. [2019-10-15 01:08:57,873 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 988 transitions. Word has length 159 [2019-10-15 01:08:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,874 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 988 transitions. [2019-10-15 01:08:57,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 988 transitions. [2019-10-15 01:08:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:08:57,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,882 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:58,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1781427860, now seen corresponding path program 1 times [2019-10-15 01:08:58,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246577970] [2019-10-15 01:08:58,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:58,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246577970] [2019-10-15 01:08:58,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063325308] [2019-10-15 01:08:58,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:58,881 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:59,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:59,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486830673] [2019-10-15 01:08:59,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:59,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:59,252 INFO L87 Difference]: Start difference. First operand 620 states and 988 transitions. Second operand 4 states. [2019-10-15 01:08:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:59,332 INFO L93 Difference]: Finished difference Result 1219 states and 1958 transitions. [2019-10-15 01:08:59,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:59,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-15 01:08:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:59,339 INFO L225 Difference]: With dead ends: 1219 [2019-10-15 01:08:59,339 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:08:59,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:08:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:08:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:08:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1000 transitions. [2019-10-15 01:08:59,370 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1000 transitions. Word has length 161 [2019-10-15 01:08:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:59,371 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1000 transitions. [2019-10-15 01:08:59,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1000 transitions. [2019-10-15 01:08:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:08:59,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:59,376 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:59,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:59,586 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,587 INFO L82 PathProgramCache]: Analyzing trace with hash -831391142, now seen corresponding path program 1 times [2019-10-15 01:08:59,587 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241006732] [2019-10-15 01:08:59,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:59,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241006732] [2019-10-15 01:08:59,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431116305] [2019-10-15 01:08:59,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:00,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:00,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:00,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694380707] [2019-10-15 01:09:00,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:00,779 INFO L87 Difference]: Start difference. First operand 629 states and 1000 transitions. Second operand 4 states. [2019-10-15 01:09:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,857 INFO L93 Difference]: Finished difference Result 1221 states and 1959 transitions. [2019-10-15 01:09:00,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:00,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 01:09:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,863 INFO L225 Difference]: With dead ends: 1221 [2019-10-15 01:09:00,864 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:09:00,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:09:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:09:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:09:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 999 transitions. [2019-10-15 01:09:00,890 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 999 transitions. Word has length 162 [2019-10-15 01:09:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,891 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 999 transitions. [2019-10-15 01:09:00,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 999 transitions. [2019-10-15 01:09:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:09:00,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:01,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,113 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1680400040, now seen corresponding path program 1 times [2019-10-15 01:09:01,114 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879191414] [2019-10-15 01:09:01,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:01,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879191414] [2019-10-15 01:09:01,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586078054] [2019-10-15 01:09:01,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:02,011 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,684 WARN L191 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-15 01:09:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:02,707 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:02,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216248974] [2019-10-15 01:09:02,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:02,710 INFO L87 Difference]: Start difference. First operand 629 states and 999 transitions. Second operand 4 states. [2019-10-15 01:09:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,785 INFO L93 Difference]: Finished difference Result 1221 states and 1958 transitions. [2019-10-15 01:09:02,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:02,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-15 01:09:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,791 INFO L225 Difference]: With dead ends: 1221 [2019-10-15 01:09:02,792 INFO L226 Difference]: Without dead ends: 629 [2019-10-15 01:09:02,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-15 01:09:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-15 01:09:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-15 01:09:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 998 transitions. [2019-10-15 01:09:02,823 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 998 transitions. Word has length 163 [2019-10-15 01:09:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,824 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 998 transitions. [2019-10-15 01:09:02,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 998 transitions. [2019-10-15 01:09:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:09:02,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,830 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:03,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,047 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1066972054, now seen corresponding path program 1 times [2019-10-15 01:09:03,048 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574617282] [2019-10-15 01:09:03,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:03,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574617282] [2019-10-15 01:09:03,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863278425] [2019-10-15 01:09:03,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:04,043 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:04,479 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:09:04,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127544764] [2019-10-15 01:09:04,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:04,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:04,482 INFO L87 Difference]: Start difference. First operand 629 states and 998 transitions. Second operand 7 states. [2019-10-15 01:09:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,631 INFO L93 Difference]: Finished difference Result 1228 states and 1967 transitions. [2019-10-15 01:09:04,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:04,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2019-10-15 01:09:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,637 INFO L225 Difference]: With dead ends: 1228 [2019-10-15 01:09:04,637 INFO L226 Difference]: Without dead ends: 640 [2019-10-15 01:09:04,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 320 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:09:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-10-15 01:09:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2019-10-15 01:09:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1008 transitions. [2019-10-15 01:09:04,667 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1008 transitions. Word has length 164 [2019-10-15 01:09:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,668 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1008 transitions. [2019-10-15 01:09:04,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1008 transitions. [2019-10-15 01:09:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:09:04,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,673 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:04,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,882 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 774586229, now seen corresponding path program 1 times [2019-10-15 01:09:04,884 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57106648] [2019-10-15 01:09:04,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:05,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57106648] [2019-10-15 01:09:05,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852222124] [2019-10-15 01:09:05,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:05,730 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:05,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:05,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41869824] [2019-10-15 01:09:05,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:05,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:05,973 INFO L87 Difference]: Start difference. First operand 636 states and 1008 transitions. Second operand 4 states. [2019-10-15 01:09:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,174 INFO L93 Difference]: Finished difference Result 1233 states and 1978 transitions. [2019-10-15 01:09:06,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:06,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-15 01:09:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,184 INFO L225 Difference]: With dead ends: 1233 [2019-10-15 01:09:06,184 INFO L226 Difference]: Without dead ends: 636 [2019-10-15 01:09:06,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-15 01:09:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-15 01:09:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1003 transitions. [2019-10-15 01:09:06,226 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1003 transitions. Word has length 164 [2019-10-15 01:09:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,227 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1003 transitions. [2019-10-15 01:09:06,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1003 transitions. [2019-10-15 01:09:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 01:09:06,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,236 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:06,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,457 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,458 INFO L82 PathProgramCache]: Analyzing trace with hash -893831295, now seen corresponding path program 1 times [2019-10-15 01:09:06,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735284525] [2019-10-15 01:09:06,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:06,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735284525] [2019-10-15 01:09:06,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856279202] [2019-10-15 01:09:06,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:07,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:07,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:07,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065863764] [2019-10-15 01:09:07,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:07,819 INFO L87 Difference]: Start difference. First operand 636 states and 1003 transitions. Second operand 4 states. [2019-10-15 01:09:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,986 INFO L93 Difference]: Finished difference Result 1233 states and 1968 transitions. [2019-10-15 01:09:07,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:07,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-15 01:09:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,991 INFO L225 Difference]: With dead ends: 1233 [2019-10-15 01:09:07,991 INFO L226 Difference]: Without dead ends: 636 [2019-10-15 01:09:07,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-15 01:09:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-15 01:09:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 998 transitions. [2019-10-15 01:09:08,017 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 998 transitions. Word has length 167 [2019-10-15 01:09:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:08,017 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 998 transitions. [2019-10-15 01:09:08,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 998 transitions. [2019-10-15 01:09:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:09:08,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:08,022 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:08,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,230 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 241086921, now seen corresponding path program 1 times [2019-10-15 01:09:08,231 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:08,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295657529] [2019-10-15 01:09:08,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:08,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295657529] [2019-10-15 01:09:08,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714061655] [2019-10-15 01:09:08,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:09,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:09,194 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:09,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:09,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:09,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003718436] [2019-10-15 01:09:09,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:09,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:09,444 INFO L87 Difference]: Start difference. First operand 636 states and 998 transitions. Second operand 4 states. [2019-10-15 01:09:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,630 INFO L93 Difference]: Finished difference Result 1269 states and 2016 transitions. [2019-10-15 01:09:09,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-15 01:09:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,636 INFO L225 Difference]: With dead ends: 1269 [2019-10-15 01:09:09,636 INFO L226 Difference]: Without dead ends: 678 [2019-10-15 01:09:09,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-15 01:09:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2019-10-15 01:09:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-10-15 01:09:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1061 transitions. [2019-10-15 01:09:09,669 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1061 transitions. Word has length 169 [2019-10-15 01:09:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,670 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1061 transitions. [2019-10-15 01:09:09,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1061 transitions. [2019-10-15 01:09:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:09:09,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,676 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,881 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1461572905, now seen corresponding path program 1 times [2019-10-15 01:09:09,882 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87866032] [2019-10-15 01:09:09,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:09:10,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87866032] [2019-10-15 01:09:10,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293068978] [2019-10-15 01:09:10,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:10,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:11,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:11,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:11,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31682680] [2019-10-15 01:09:11,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:11,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:11,043 INFO L87 Difference]: Start difference. First operand 675 states and 1061 transitions. Second operand 4 states. [2019-10-15 01:09:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:11,254 INFO L93 Difference]: Finished difference Result 1269 states and 2014 transitions. [2019-10-15 01:09:11,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:11,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-15 01:09:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:11,261 INFO L225 Difference]: With dead ends: 1269 [2019-10-15 01:09:11,261 INFO L226 Difference]: Without dead ends: 675 [2019-10-15 01:09:11,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-10-15 01:09:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2019-10-15 01:09:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-10-15 01:09:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1056 transitions. [2019-10-15 01:09:11,293 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1056 transitions. Word has length 169 [2019-10-15 01:09:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:11,293 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1056 transitions. [2019-10-15 01:09:11,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1056 transitions. [2019-10-15 01:09:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:09:11,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:11,300 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:11,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,517 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2144540106, now seen corresponding path program 1 times [2019-10-15 01:09:11,525 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420421821] [2019-10-15 01:09:11,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:11,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420421821] [2019-10-15 01:09:11,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319590020] [2019-10-15 01:09:11,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:12,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:12,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:12,897 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:12,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:12,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596491351] [2019-10-15 01:09:12,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:12,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:12,899 INFO L87 Difference]: Start difference. First operand 675 states and 1056 transitions. Second operand 11 states. [2019-10-15 01:09:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:13,044 INFO L93 Difference]: Finished difference Result 1206 states and 1909 transitions. [2019-10-15 01:09:13,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:13,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2019-10-15 01:09:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:13,049 INFO L225 Difference]: With dead ends: 1206 [2019-10-15 01:09:13,050 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:13,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 682. [2019-10-15 01:09:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-10-15 01:09:13,078 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 169 [2019-10-15 01:09:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:13,079 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-10-15 01:09:13,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-10-15 01:09:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:13,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:13,084 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:13,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,294 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 418081852, now seen corresponding path program 1 times [2019-10-15 01:09:13,295 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609874397] [2019-10-15 01:09:13,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:13,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609874397] [2019-10-15 01:09:13,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987935402] [2019-10-15 01:09:13,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:14,318 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:14,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:14,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:14,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6877560] [2019-10-15 01:09:14,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:14,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:14,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:14,859 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 9 states. [2019-10-15 01:09:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:15,126 INFO L93 Difference]: Finished difference Result 1285 states and 2031 transitions. [2019-10-15 01:09:15,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:15,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2019-10-15 01:09:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:15,132 INFO L225 Difference]: With dead ends: 1285 [2019-10-15 01:09:15,132 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:15,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 325 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 684. [2019-10-15 01:09:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-15 01:09:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-10-15 01:09:15,166 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 170 [2019-10-15 01:09:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:15,166 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-10-15 01:09:15,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-10-15 01:09:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:09:15,171 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:15,171 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:15,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,387 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1600776161, now seen corresponding path program 1 times [2019-10-15 01:09:15,388 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:15,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626152319] [2019-10-15 01:09:15,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:15,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626152319] [2019-10-15 01:09:15,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107397542] [2019-10-15 01:09:15,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:16,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:16,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:17,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:17,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:17,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732294533] [2019-10-15 01:09:17,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:17,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:17,013 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 4 states. [2019-10-15 01:09:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,249 INFO L93 Difference]: Finished difference Result 1287 states and 2037 transitions. [2019-10-15 01:09:17,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:17,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-15 01:09:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,256 INFO L225 Difference]: With dead ends: 1287 [2019-10-15 01:09:17,256 INFO L226 Difference]: Without dead ends: 684 [2019-10-15 01:09:17,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-15 01:09:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-15 01:09:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-15 01:09:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1065 transitions. [2019-10-15 01:09:17,295 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1065 transitions. Word has length 171 [2019-10-15 01:09:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,295 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1065 transitions. [2019-10-15 01:09:17,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1065 transitions. [2019-10-15 01:09:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 01:09:17,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,305 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:17,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,517 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1668287785, now seen corresponding path program 1 times [2019-10-15 01:09:17,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776274432] [2019-10-15 01:09:17,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:17,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776274432] [2019-10-15 01:09:17,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900763925] [2019-10-15 01:09:17,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:18,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:19,116 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:19,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:19,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723329529] [2019-10-15 01:09:19,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:19,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:19,118 INFO L87 Difference]: Start difference. First operand 684 states and 1065 transitions. Second operand 8 states. [2019-10-15 01:09:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,230 INFO L93 Difference]: Finished difference Result 1214 states and 1920 transitions. [2019-10-15 01:09:19,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:19,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2019-10-15 01:09:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,235 INFO L225 Difference]: With dead ends: 1214 [2019-10-15 01:09:19,235 INFO L226 Difference]: Without dead ends: 698 [2019-10-15 01:09:19,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-15 01:09:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 691. [2019-10-15 01:09:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-15 01:09:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1076 transitions. [2019-10-15 01:09:19,263 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1076 transitions. Word has length 172 [2019-10-15 01:09:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,264 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1076 transitions. [2019-10-15 01:09:19,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1076 transitions. [2019-10-15 01:09:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:19,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:19,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,478 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1493406043, now seen corresponding path program 1 times [2019-10-15 01:09:19,479 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:19,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189785315] [2019-10-15 01:09:19,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:19,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189785315] [2019-10-15 01:09:19,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034959959] [2019-10-15 01:09:19,612 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