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_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:17,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:17,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:17,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:17,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:17,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:17,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:17,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:17,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:17,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:17,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:17,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:17,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:17,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:17,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:17,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:17,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:17,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:17,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:17,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:17,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:17,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:17,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:17,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:17,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:17,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:17,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:17,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:17,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:17,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:17,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:17,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:17,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:17,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:17,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:17,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:17,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:17,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:17,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:17,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:17,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:17,105 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 01:08:17,125 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:17,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:17,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:17,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:17,128 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:17,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:17,128 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:17,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:17,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:17,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:17,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:17,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:17,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:17,131 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:17,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:17,132 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:17,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:17,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:17,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:17,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:17,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:17,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:17,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:17,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:17,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:17,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:17,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:17,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:17,134 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 01:08:17,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:17,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:17,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:17,489 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:17,489 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:17,490 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product01.cil.c [2019-10-15 01:08:17,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b8ba991/c9f2afc721fa48b1b24e2e13794ee75e/FLAGf995bffb2 [2019-10-15 01:08:18,171 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:18,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product01.cil.c [2019-10-15 01:08:18,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b8ba991/c9f2afc721fa48b1b24e2e13794ee75e/FLAGf995bffb2 [2019-10-15 01:08:18,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b8ba991/c9f2afc721fa48b1b24e2e13794ee75e [2019-10-15 01:08:18,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:18,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:18,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:18,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:18,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:18,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:18" (1/1) ... [2019-10-15 01:08:18,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b97192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:18, skipping insertion in model container [2019-10-15 01:08:18,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:18" (1/1) ... [2019-10-15 01:08:18,403 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:18,475 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:19,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:19,253 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:19,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:19,436 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:19,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19 WrapperNode [2019-10-15 01:08:19,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:19,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:19,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:19,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:19,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:19,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:19,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:19,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:19,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (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 01:08:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:19,726 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:19,728 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:19,743 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:19,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:19,743 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:19,743 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:19,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:19,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:22,207 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:22,207 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:22,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:22 BoogieIcfgContainer [2019-10-15 01:08:22,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:22,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:22,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:22,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:22,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:18" (1/3) ... [2019-10-15 01:08:22,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c9ea6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:22, skipping insertion in model container [2019-10-15 01:08:22,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (2/3) ... [2019-10-15 01:08:22,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c9ea6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:22, skipping insertion in model container [2019-10-15 01:08:22,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:22" (3/3) ... [2019-10-15 01:08:22,217 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2019-10-15 01:08:22,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:22,237 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:22,249 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:22,286 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:22,287 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:22,287 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:22,287 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:22,287 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:22,287 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:22,287 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:22,287 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states. [2019-10-15 01:08:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 01:08:22,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:22,361 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:22,363 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1026623827, now seen corresponding path program 1 times [2019-10-15 01:08:22,383 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:22,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270350253] [2019-10-15 01:08:22,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:22,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:22,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:23,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270350253] [2019-10-15 01:08:23,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299161935] [2019-10-15 01:08:23,009 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 01:08:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:23,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:23,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:23,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:24,320 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:24,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:24,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723180808] [2019-10-15 01:08:24,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:24,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:24,349 INFO L87 Difference]: Start difference. First operand 722 states. Second operand 2 states. [2019-10-15 01:08:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:24,424 INFO L93 Difference]: Finished difference Result 605 states and 974 transitions. [2019-10-15 01:08:24,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:24,426 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-15 01:08:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:24,454 INFO L225 Difference]: With dead ends: 605 [2019-10-15 01:08:24,454 INFO L226 Difference]: Without dead ends: 568 [2019-10-15 01:08:24,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-15 01:08:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-15 01:08:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-15 01:08:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 919 transitions. [2019-10-15 01:08:24,590 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 919 transitions. Word has length 138 [2019-10-15 01:08:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:24,601 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 919 transitions. [2019-10-15 01:08:24,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 919 transitions. [2019-10-15 01:08:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 01:08:24,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:24,629 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:24,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:24,831 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1495130976, now seen corresponding path program 1 times [2019-10-15 01:08:24,832 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:24,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424070492] [2019-10-15 01:08:24,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:24,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:24,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:25,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424070492] [2019-10-15 01:08:25,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060675439] [2019-10-15 01:08:25,149 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 01:08:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:25,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:25,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:25,853 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:26,084 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:26,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:26,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291548926] [2019-10-15 01:08:26,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:26,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:26,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:26,087 INFO L87 Difference]: Start difference. First operand 568 states and 919 transitions. Second operand 4 states. [2019-10-15 01:08:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:26,177 INFO L93 Difference]: Finished difference Result 1108 states and 1811 transitions. [2019-10-15 01:08:26,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:26,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 01:08:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:26,183 INFO L225 Difference]: With dead ends: 1108 [2019-10-15 01:08:26,184 INFO L226 Difference]: Without dead ends: 568 [2019-10-15 01:08:26,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-15 01:08:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-15 01:08:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-15 01:08:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 918 transitions. [2019-10-15 01:08:26,224 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 918 transitions. Word has length 140 [2019-10-15 01:08:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:26,227 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 918 transitions. [2019-10-15 01:08:26,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 918 transitions. [2019-10-15 01:08:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:08:26,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:26,233 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:26,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:26,444 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 983966334, now seen corresponding path program 1 times [2019-10-15 01:08:26,445 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:26,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377247190] [2019-10-15 01:08:26,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:26,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:26,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:26,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377247190] [2019-10-15 01:08:26,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026343705] [2019-10-15 01:08:26,635 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 01:08:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:27,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:27,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:27,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:27,578 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:27,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:27,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489365417] [2019-10-15 01:08:27,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:27,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:27,581 INFO L87 Difference]: Start difference. First operand 568 states and 918 transitions. Second operand 4 states. [2019-10-15 01:08:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:27,674 INFO L93 Difference]: Finished difference Result 1108 states and 1809 transitions. [2019-10-15 01:08:27,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:27,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 01:08:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:27,683 INFO L225 Difference]: With dead ends: 1108 [2019-10-15 01:08:27,683 INFO L226 Difference]: Without dead ends: 568 [2019-10-15 01:08:27,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-15 01:08:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-15 01:08:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-15 01:08:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 917 transitions. [2019-10-15 01:08:27,727 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 917 transitions. Word has length 142 [2019-10-15 01:08:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:27,727 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 917 transitions. [2019-10-15 01:08:27,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 917 transitions. [2019-10-15 01:08:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:08:27,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:27,737 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:27,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:27,953 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash 491565736, now seen corresponding path program 1 times [2019-10-15 01:08:27,955 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:27,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103907966] [2019-10-15 01:08:27,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:27,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:27,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:28,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103907966] [2019-10-15 01:08:28,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820862622] [2019-10-15 01:08:28,234 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 01:08:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:28,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:28,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:28,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:29,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:29,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:29,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129680428] [2019-10-15 01:08:29,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:29,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:29,162 INFO L87 Difference]: Start difference. First operand 568 states and 917 transitions. Second operand 4 states. [2019-10-15 01:08:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:29,239 INFO L93 Difference]: Finished difference Result 1115 states and 1816 transitions. [2019-10-15 01:08:29,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:29,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 01:08:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:29,244 INFO L225 Difference]: With dead ends: 1115 [2019-10-15 01:08:29,245 INFO L226 Difference]: Without dead ends: 577 [2019-10-15 01:08:29,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-15 01:08:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-15 01:08:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-15 01:08:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 929 transitions. [2019-10-15 01:08:29,275 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 929 transitions. Word has length 144 [2019-10-15 01:08:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:29,276 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 929 transitions. [2019-10-15 01:08:29,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 929 transitions. [2019-10-15 01:08:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:08:29,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:29,282 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:29,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:29,483 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1278076607, now seen corresponding path program 1 times [2019-10-15 01:08:29,485 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:29,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869871183] [2019-10-15 01:08:29,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:29,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:29,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869871183] [2019-10-15 01:08:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618523951] [2019-10-15 01:08:29,605 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 01:08:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:30,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:30,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:30,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:30,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:30,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:30,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392379813] [2019-10-15 01:08:30,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:30,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:30,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:30,520 INFO L87 Difference]: Start difference. First operand 577 states and 929 transitions. Second operand 4 states. [2019-10-15 01:08:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:30,601 INFO L93 Difference]: Finished difference Result 1117 states and 1817 transitions. [2019-10-15 01:08:30,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:30,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-15 01:08:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:30,606 INFO L225 Difference]: With dead ends: 1117 [2019-10-15 01:08:30,606 INFO L226 Difference]: Without dead ends: 577 [2019-10-15 01:08:30,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-15 01:08:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-15 01:08:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-15 01:08:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 928 transitions. [2019-10-15 01:08:30,629 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 928 transitions. Word has length 145 [2019-10-15 01:08:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:30,630 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 928 transitions. [2019-10-15 01:08:30,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 928 transitions. [2019-10-15 01:08:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:08:30,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:30,635 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:30,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:30,842 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash 697827020, now seen corresponding path program 1 times [2019-10-15 01:08:30,844 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:30,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480447065] [2019-10-15 01:08:30,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:30,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:30,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:30,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480447065] [2019-10-15 01:08:30,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130936193] [2019-10-15 01:08:30,959 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 01:08:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:31,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:31,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:31,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:31,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:31,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:31,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722057019] [2019-10-15 01:08:31,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:31,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:31,910 INFO L87 Difference]: Start difference. First operand 577 states and 928 transitions. Second operand 4 states. [2019-10-15 01:08:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:32,014 INFO L93 Difference]: Finished difference Result 1117 states and 1816 transitions. [2019-10-15 01:08:32,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:32,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-15 01:08:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:32,019 INFO L225 Difference]: With dead ends: 1117 [2019-10-15 01:08:32,019 INFO L226 Difference]: Without dead ends: 577 [2019-10-15 01:08:32,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-15 01:08:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-15 01:08:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-15 01:08:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 927 transitions. [2019-10-15 01:08:32,045 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 927 transitions. Word has length 146 [2019-10-15 01:08:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:32,045 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 927 transitions. [2019-10-15 01:08:32,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 927 transitions. [2019-10-15 01:08:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:08:32,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:32,050 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:32,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:32,260 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1473428571, now seen corresponding path program 1 times [2019-10-15 01:08:32,261 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:32,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564725002] [2019-10-15 01:08:32,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:32,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:32,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:32,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564725002] [2019-10-15 01:08:32,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065915001] [2019-10-15 01:08:32,425 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 01:08:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:33,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:33,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:33,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:33,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:33,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:08:33,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495751872] [2019-10-15 01:08:33,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:33,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:33,542 INFO L87 Difference]: Start difference. First operand 577 states and 927 transitions. Second operand 7 states. [2019-10-15 01:08:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:33,698 INFO L93 Difference]: Finished difference Result 1124 states and 1825 transitions. [2019-10-15 01:08:33,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:33,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-15 01:08:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:33,704 INFO L225 Difference]: With dead ends: 1124 [2019-10-15 01:08:33,704 INFO L226 Difference]: Without dead ends: 588 [2019-10-15 01:08:33,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 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 01:08:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2019-10-15 01:08:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 584. [2019-10-15 01:08:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 937 transitions. [2019-10-15 01:08:33,729 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 937 transitions. Word has length 147 [2019-10-15 01:08:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:33,730 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 937 transitions. [2019-10-15 01:08:33,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 937 transitions. [2019-10-15 01:08:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:08:33,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:33,734 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:33,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:33,951 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:33,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1997857254, now seen corresponding path program 1 times [2019-10-15 01:08:33,951 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:33,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751736857] [2019-10-15 01:08:33,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:33,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:33,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:34,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751736857] [2019-10-15 01:08:34,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30871362] [2019-10-15 01:08:34,062 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 01:08:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:34,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:34,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:34,711 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:34,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:34,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:34,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724942662] [2019-10-15 01:08:34,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:34,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:34,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:34,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:34,923 INFO L87 Difference]: Start difference. First operand 584 states and 937 transitions. Second operand 4 states. [2019-10-15 01:08:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:35,085 INFO L93 Difference]: Finished difference Result 1129 states and 1836 transitions. [2019-10-15 01:08:35,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:35,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 01:08:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:35,097 INFO L225 Difference]: With dead ends: 1129 [2019-10-15 01:08:35,097 INFO L226 Difference]: Without dead ends: 584 [2019-10-15 01:08:35,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-15 01:08:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-15 01:08:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 932 transitions. [2019-10-15 01:08:35,122 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 932 transitions. Word has length 147 [2019-10-15 01:08:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:35,122 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 932 transitions. [2019-10-15 01:08:35,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 932 transitions. [2019-10-15 01:08:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:08:35,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:35,126 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] [2019-10-15 01:08:35,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:35,344 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash 358619992, now seen corresponding path program 1 times [2019-10-15 01:08:35,345 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:35,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381081275] [2019-10-15 01:08:35,345 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:35,345 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:35,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:35,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381081275] [2019-10-15 01:08:35,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482711859] [2019-10-15 01:08:35,455 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 01:08:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:36,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:36,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:36,287 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:36,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:36,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:36,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6459359] [2019-10-15 01:08:36,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:36,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:36,511 INFO L87 Difference]: Start difference. First operand 584 states and 932 transitions. Second operand 4 states. [2019-10-15 01:08:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:36,646 INFO L93 Difference]: Finished difference Result 1129 states and 1826 transitions. [2019-10-15 01:08:36,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:36,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-15 01:08:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:36,652 INFO L225 Difference]: With dead ends: 1129 [2019-10-15 01:08:36,652 INFO L226 Difference]: Without dead ends: 584 [2019-10-15 01:08:36,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 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 01:08:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-15 01:08:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-15 01:08:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 927 transitions. [2019-10-15 01:08:36,676 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 927 transitions. Word has length 149 [2019-10-15 01:08:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:36,677 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 927 transitions. [2019-10-15 01:08:36,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 927 transitions. [2019-10-15 01:08:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:08:36,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:36,681 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:36,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:36,898 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2079231576, now seen corresponding path program 1 times [2019-10-15 01:08:36,899 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:36,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932717072] [2019-10-15 01:08:36,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:36,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:36,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:37,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932717072] [2019-10-15 01:08:37,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75327927] [2019-10-15 01:08:37,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:08:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:37,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:37,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:37,817 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:38,161 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:38,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:08:38,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117059321] [2019-10-15 01:08:38,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:08:38,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:08:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:38,163 INFO L87 Difference]: Start difference. First operand 584 states and 927 transitions. Second operand 11 states. [2019-10-15 01:08:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:38,317 INFO L93 Difference]: Finished difference Result 1060 states and 1705 transitions. [2019-10-15 01:08:38,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:08:38,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-15 01:08:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:38,323 INFO L225 Difference]: With dead ends: 1060 [2019-10-15 01:08:38,323 INFO L226 Difference]: Without dead ends: 596 [2019-10-15 01:08:38,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-15 01:08:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 588. [2019-10-15 01:08:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2019-10-15 01:08:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 932 transitions. [2019-10-15 01:08:38,354 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 932 transitions. Word has length 152 [2019-10-15 01:08:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:38,356 INFO L462 AbstractCegarLoop]: Abstraction has 588 states and 932 transitions. [2019-10-15 01:08:38,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:08:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 932 transitions. [2019-10-15 01:08:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:08:38,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:38,362 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:38,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:38,571 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 736522260, now seen corresponding path program 2 times [2019-10-15 01:08:38,572 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:38,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287871022] [2019-10-15 01:08:38,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:38,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:38,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:38,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287871022] [2019-10-15 01:08:38,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034758439] [2019-10-15 01:08:38,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 01:08:39,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-15 01:08:39,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:08:39,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:39,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:08:39,453 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:39,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:08:39,988 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:39,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:08:39,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2641809] [2019-10-15 01:08:39,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:08:39,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:08:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:39,991 INFO L87 Difference]: Start difference. First operand 588 states and 932 transitions. Second operand 14 states. [2019-10-15 01:08:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:40,542 INFO L93 Difference]: Finished difference Result 1064 states and 1712 transitions. [2019-10-15 01:08:40,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:08:40,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 152 [2019-10-15 01:08:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:40,550 INFO L225 Difference]: With dead ends: 1064 [2019-10-15 01:08:40,550 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:08:40,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:08:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2019-10-15 01:08:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-15 01:08:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 939 transitions. [2019-10-15 01:08:40,593 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 939 transitions. Word has length 152 [2019-10-15 01:08:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:40,597 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 939 transitions. [2019-10-15 01:08:40,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:08:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 939 transitions. [2019-10-15 01:08:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:08:40,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:40,605 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:40,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:40,824 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1019317961, now seen corresponding path program 1 times [2019-10-15 01:08:40,825 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:40,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858270087] [2019-10-15 01:08:40,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:40,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:40,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:41,004 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 01:08:41,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858270087] [2019-10-15 01:08:41,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86670073] [2019-10-15 01:08:41,005 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 01:08:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:42,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:42,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:08:42,139 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:42,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:08:42,829 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:42,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:08:42,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118982842] [2019-10-15 01:08:42,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:08:42,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:08:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:42,832 INFO L87 Difference]: Start difference. First operand 592 states and 939 transitions. Second operand 11 states. [2019-10-15 01:08:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:43,078 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2019-10-15 01:08:43,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:43,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-15 01:08:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:43,084 INFO L225 Difference]: With dead ends: 1067 [2019-10-15 01:08:43,084 INFO L226 Difference]: Without dead ends: 603 [2019-10-15 01:08:43,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-15 01:08:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2019-10-15 01:08:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-10-15 01:08:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 956 transitions. [2019-10-15 01:08:43,124 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 956 transitions. Word has length 154 [2019-10-15 01:08:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:43,125 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 956 transitions. [2019-10-15 01:08:43,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:08:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 956 transitions. [2019-10-15 01:08:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:08:43,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:43,130 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:43,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:43,340 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1481533394, now seen corresponding path program 1 times [2019-10-15 01:08:43,341 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:43,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045704410] [2019-10-15 01:08:43,342 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:43,342 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:43,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:43,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045704410] [2019-10-15 01:08:43,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611972841] [2019-10-15 01:08:43,473 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 01:08:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:44,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:44,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:44,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:44,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:08:44,910 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:44,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:08:44,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261027032] [2019-10-15 01:08:44,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:44,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:44,913 INFO L87 Difference]: Start difference. First operand 601 states and 956 transitions. Second operand 9 states. [2019-10-15 01:08:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:45,154 INFO L93 Difference]: Finished difference Result 1159 states and 1860 transitions. [2019-10-15 01:08:45,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:45,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-15 01:08:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:45,160 INFO L225 Difference]: With dead ends: 1159 [2019-10-15 01:08:45,160 INFO L226 Difference]: Without dead ends: 603 [2019-10-15 01:08:45,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-15 01:08:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 599. [2019-10-15 01:08:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-15 01:08:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 952 transitions. [2019-10-15 01:08:45,194 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 952 transitions. Word has length 155 [2019-10-15 01:08:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:45,195 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 952 transitions. [2019-10-15 01:08:45,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 952 transitions. [2019-10-15 01:08:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:08:45,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:45,201 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:45,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:45,412 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -361741041, now seen corresponding path program 1 times [2019-10-15 01:08:45,413 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:45,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100268904] [2019-10-15 01:08:45,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:45,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:45,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:45,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100268904] [2019-10-15 01:08:45,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544685521] [2019-10-15 01:08:45,553 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 01:08:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:46,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:46,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:46,305 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:46,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:46,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:46,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255979815] [2019-10-15 01:08:46,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:46,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:46,640 INFO L87 Difference]: Start difference. First operand 599 states and 952 transitions. Second operand 4 states. [2019-10-15 01:08:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:46,841 INFO L93 Difference]: Finished difference Result 1198 states and 1933 transitions. [2019-10-15 01:08:46,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:46,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-15 01:08:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:46,847 INFO L225 Difference]: With dead ends: 1198 [2019-10-15 01:08:46,847 INFO L226 Difference]: Without dead ends: 644 [2019-10-15 01:08:46,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 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 01:08:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-10-15 01:08:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 641. [2019-10-15 01:08:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-15 01:08:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1021 transitions. [2019-10-15 01:08:46,897 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1021 transitions. Word has length 154 [2019-10-15 01:08:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:46,897 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1021 transitions. [2019-10-15 01:08:46,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1021 transitions. [2019-10-15 01:08:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:08:46,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:46,903 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:47,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:47,113 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1095874226, now seen corresponding path program 1 times [2019-10-15 01:08:47,113 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:47,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700436677] [2019-10-15 01:08:47,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:47,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:47,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:47,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700436677] [2019-10-15 01:08:47,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661350936] [2019-10-15 01:08:47,211 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 01:08:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:47,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:47,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:47,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:48,192 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:48,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:48,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42144165] [2019-10-15 01:08:48,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:48,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:48,194 INFO L87 Difference]: Start difference. First operand 641 states and 1021 transitions. Second operand 4 states. [2019-10-15 01:08:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:48,399 INFO L93 Difference]: Finished difference Result 1201 states and 1934 transitions. [2019-10-15 01:08:48,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:48,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-15 01:08:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:48,406 INFO L225 Difference]: With dead ends: 1201 [2019-10-15 01:08:48,406 INFO L226 Difference]: Without dead ends: 641 [2019-10-15 01:08:48,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 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 01:08:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2019-10-15 01:08:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2019-10-15 01:08:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-15 01:08:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1016 transitions. [2019-10-15 01:08:48,434 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1016 transitions. Word has length 155 [2019-10-15 01:08:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:48,435 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1016 transitions. [2019-10-15 01:08:48,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1016 transitions. [2019-10-15 01:08:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 01:08:48,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:48,439 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:48,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:48,649 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash 735813108, now seen corresponding path program 1 times [2019-10-15 01:08:48,650 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:48,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780349572] [2019-10-15 01:08:48,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:48,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780349572] [2019-10-15 01:08:48,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804749874] [2019-10-15 01:08:48,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:49,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:49,626 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:49,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:49,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:49,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645287644] [2019-10-15 01:08:49,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:49,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:49,830 INFO L87 Difference]: Start difference. First operand 641 states and 1016 transitions. Second operand 4 states. [2019-10-15 01:08:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:50,019 INFO L93 Difference]: Finished difference Result 1201 states and 1929 transitions. [2019-10-15 01:08:50,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:50,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-15 01:08:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:50,027 INFO L225 Difference]: With dead ends: 1201 [2019-10-15 01:08:50,027 INFO L226 Difference]: Without dead ends: 641 [2019-10-15 01:08:50,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 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 01:08:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2019-10-15 01:08:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2019-10-15 01:08:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-15 01:08:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1011 transitions. [2019-10-15 01:08:50,060 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1011 transitions. Word has length 156 [2019-10-15 01:08:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:50,061 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1011 transitions. [2019-10-15 01:08:50,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1011 transitions. [2019-10-15 01:08:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:08:50,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:50,067 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:08:50,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:50,277 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash 840447251, now seen corresponding path program 1 times [2019-10-15 01:08:50,277 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:50,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723825891] [2019-10-15 01:08:50,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,379 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 01:08:50,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723825891] [2019-10-15 01:08:50,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378627497] [2019-10-15 01:08:50,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:08:51,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:51,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:51,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:51,576 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:51,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:08:51,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223097961] [2019-10-15 01:08:51,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:51,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:51,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:51,578 INFO L87 Difference]: Start difference. First operand 641 states and 1011 transitions. Second operand 9 states. [2019-10-15 01:08:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:51,721 INFO L93 Difference]: Finished difference Result 1208 states and 1951 transitions. [2019-10-15 01:08:51,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:51,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-15 01:08:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:51,727 INFO L225 Difference]: With dead ends: 1208 [2019-10-15 01:08:51,728 INFO L226 Difference]: Without dead ends: 650 [2019-10-15 01:08:51,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-10-15 01:08:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2019-10-15 01:08:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-15 01:08:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1019 transitions. [2019-10-15 01:08:51,767 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1019 transitions. Word has length 155 [2019-10-15 01:08:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:51,768 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1019 transitions. [2019-10-15 01:08:51,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1019 transitions. [2019-10-15 01:08:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 01:08:51,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:51,774 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:08:51,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:51,983 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1516665540, now seen corresponding path program 1 times [2019-10-15 01:08:51,984 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:51,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39798591] [2019-10-15 01:08:51,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:51,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:51,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat