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_spec3_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:11:31,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:11:31,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:11:31,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:11:31,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:11:31,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:11:31,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:11:31,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:11:31,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:11:31,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:11:31,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:11:31,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:11:31,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:11:31,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:11:31,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:11:31,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:11:31,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:11:31,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:11:31,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:11:31,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:11:31,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:11:31,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:11:31,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:11:31,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:11:31,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:11:31,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:11:31,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:11:31,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:11:31,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:11:31,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:11:31,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:11:31,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:11:31,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:11:31,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:11:31,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:11:31,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:11:31,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:11:31,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:11:31,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:11:31,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:11:31,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:11:31,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:11:31,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:11:31,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:11:31,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:11:31,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:11:31,675 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:11:31,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:11:31,676 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:11:31,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:11:31,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:11:31,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:11:31,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:11:31,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:11:31,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:11:31,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:11:31,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:11:31,678 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:11:31,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:11:31,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:11:31,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:11:31,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:11:31,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:11:31,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:31,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:11:31,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:11:31,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:11:31,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:11:31,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:11:31,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:11:31,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:11:31,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:11:32,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:11:32,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:11:32,015 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:11:32,015 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:11:32,016 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-13 21:11:32,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81850981/c20fd526e5814146858e249ae5d1c585/FLAG31808aa15 [2019-10-13 21:11:32,721 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:11:32,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-13 21:11:32,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81850981/c20fd526e5814146858e249ae5d1c585/FLAG31808aa15 [2019-10-13 21:11:32,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81850981/c20fd526e5814146858e249ae5d1c585 [2019-10-13 21:11:32,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:11:32,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:11:32,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:32,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:11:32,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:11:32,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:32" (1/1) ... [2019-10-13 21:11:32,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f9a405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:32, skipping insertion in model container [2019-10-13 21:11:32,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:32" (1/1) ... [2019-10-13 21:11:32,908 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:11:32,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:11:33,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:33,730 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:11:33,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:34,028 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:11:34,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34 WrapperNode [2019-10-13 21:11:34,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:34,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:11:34,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:11:34,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:11:34,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:11:34,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:11:34,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:11:34,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:11:34,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:11:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:11:34,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:34,303 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:11:34,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:11:34,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:11:34,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:11:34,305 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:11:34,306 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:11:34,306 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:11:34,307 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:11:34,307 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:11:34,307 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:11:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:11:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:11:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:11:34,311 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:11:34,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:34,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:34,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:34,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:11:34,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:11:34,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:11:34,313 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:11:34,313 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:11:34,314 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:11:34,315 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:11:34,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:11:34,315 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:11:34,315 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:11:34,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:11:34,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:11:34,316 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:11:34,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:11:34,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:11:34,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:11:34,317 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:11:34,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:11:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:11:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:11:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:11:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:11:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:11:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:11:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:11:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:11:34,319 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:11:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:11:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:11:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:11:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:11:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:11:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:11:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:11:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:11:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:11:34,322 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:11:34,322 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:11:34,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:11:34,324 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:11:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:11:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:11:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:11:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:11:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:11:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:11:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:11:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:11:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:11:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:11:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:11:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:11:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:11:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:11:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:11:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:11:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:11:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:11:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:11:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:11:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:11:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:11:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:11:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:11:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:11:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:11:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:11:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:11:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:11:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:11:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:11:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:11:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:11:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:11:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:11:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:11:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:11:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:11:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:11:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:11:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:11:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:11:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:11:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:11:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:11:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:11:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:11:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:11:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:11:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:11:34,347 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:11:34,353 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:11:34,354 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:11:34,354 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:11:34,354 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:11:34,355 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:11:34,355 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:11:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:11:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:11:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:11:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:11:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:11:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:11:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:11:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:11:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:11:36,721 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:11:36,722 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:11:36,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:36 BoogieIcfgContainer [2019-10-13 21:11:36,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:11:36,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:11:36,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:11:36,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:11:36,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:11:32" (1/3) ... [2019-10-13 21:11:36,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3e9e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:36, skipping insertion in model container [2019-10-13 21:11:36,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34" (2/3) ... [2019-10-13 21:11:36,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3e9e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:36, skipping insertion in model container [2019-10-13 21:11:36,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:36" (3/3) ... [2019-10-13 21:11:36,735 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2019-10-13 21:11:36,745 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:11:36,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:11:36,767 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:11:36,806 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:11:36,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:11:36,807 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:11:36,807 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:11:36,807 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:11:36,807 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:11:36,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:11:36,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:11:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states. [2019-10-13 21:11:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:11:36,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:36,877 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:36,879 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash 766900618, now seen corresponding path program 1 times [2019-10-13 21:11:36,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:36,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828354192] [2019-10-13 21:11:36,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:36,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:36,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:37,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828354192] [2019-10-13 21:11:37,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:37,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:37,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679287748] [2019-10-13 21:11:37,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:37,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:37,550 INFO L87 Difference]: Start difference. First operand 762 states. Second operand 7 states. [2019-10-13 21:11:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:37,882 INFO L93 Difference]: Finished difference Result 1203 states and 1962 transitions. [2019-10-13 21:11:37,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:37,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-13 21:11:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:37,927 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:11:37,928 INFO L226 Difference]: Without dead ends: 610 [2019-10-13 21:11:37,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2019-10-13 21:11:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 608. [2019-10-13 21:11:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-10-13 21:11:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 976 transitions. [2019-10-13 21:11:38,052 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 976 transitions. Word has length 115 [2019-10-13 21:11:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:38,053 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 976 transitions. [2019-10-13 21:11:38,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 976 transitions. [2019-10-13 21:11:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:11:38,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:38,063 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:11:38,063 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2028873896, now seen corresponding path program 1 times [2019-10-13 21:11:38,064 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220425830] [2019-10-13 21:11:38,064 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:38,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220425830] [2019-10-13 21:11:38,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:38,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:38,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552161795] [2019-10-13 21:11:38,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:38,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:38,260 INFO L87 Difference]: Start difference. First operand 608 states and 976 transitions. Second operand 4 states. [2019-10-13 21:11:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:38,351 INFO L93 Difference]: Finished difference Result 1182 states and 1917 transitions. [2019-10-13 21:11:38,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:38,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 21:11:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:38,359 INFO L225 Difference]: With dead ends: 1182 [2019-10-13 21:11:38,359 INFO L226 Difference]: Without dead ends: 590 [2019-10-13 21:11:38,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-10-13 21:11:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-10-13 21:11:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-10-13 21:11:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 943 transitions. [2019-10-13 21:11:38,416 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 943 transitions. Word has length 116 [2019-10-13 21:11:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:38,419 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 943 transitions. [2019-10-13 21:11:38,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 943 transitions. [2019-10-13 21:11:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:11:38,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:38,426 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:11:38,426 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -597122142, now seen corresponding path program 1 times [2019-10-13 21:11:38,427 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502240035] [2019-10-13 21:11:38,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:38,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502240035] [2019-10-13 21:11:38,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:38,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:38,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825736485] [2019-10-13 21:11:38,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:38,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:38,695 INFO L87 Difference]: Start difference. First operand 590 states and 943 transitions. Second operand 7 states. [2019-10-13 21:11:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:38,826 INFO L93 Difference]: Finished difference Result 1151 states and 1859 transitions. [2019-10-13 21:11:38,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:38,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-13 21:11:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:38,834 INFO L225 Difference]: With dead ends: 1151 [2019-10-13 21:11:38,835 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:11:38,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:11:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:11:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:11:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 930 transitions. [2019-10-13 21:11:38,880 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 930 transitions. Word has length 116 [2019-10-13 21:11:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:38,881 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 930 transitions. [2019-10-13 21:11:38,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 930 transitions. [2019-10-13 21:11:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 21:11:38,885 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:38,885 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:11:38,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash 28817582, now seen corresponding path program 1 times [2019-10-13 21:11:38,887 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302496560] [2019-10-13 21:11:38,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:39,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302496560] [2019-10-13 21:11:39,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:39,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:39,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091660455] [2019-10-13 21:11:39,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:39,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:39,146 INFO L87 Difference]: Start difference. First operand 584 states and 930 transitions. Second operand 7 states. [2019-10-13 21:11:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:39,239 INFO L93 Difference]: Finished difference Result 1139 states and 1833 transitions. [2019-10-13 21:11:39,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:39,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2019-10-13 21:11:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:39,246 INFO L225 Difference]: With dead ends: 1139 [2019-10-13 21:11:39,246 INFO L226 Difference]: Without dead ends: 578 [2019-10-13 21:11:39,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2019-10-13 21:11:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2019-10-13 21:11:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2019-10-13 21:11:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 917 transitions. [2019-10-13 21:11:39,282 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 917 transitions. Word has length 117 [2019-10-13 21:11:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:39,282 INFO L462 AbstractCegarLoop]: Abstraction has 578 states and 917 transitions. [2019-10-13 21:11:39,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 917 transitions. [2019-10-13 21:11:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:11:39,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:39,286 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:39,286 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2080915130, now seen corresponding path program 1 times [2019-10-13 21:11:39,287 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:39,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371564408] [2019-10-13 21:11:39,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:39,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371564408] [2019-10-13 21:11:39,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:39,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:39,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882984657] [2019-10-13 21:11:39,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:39,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:39,630 INFO L87 Difference]: Start difference. First operand 578 states and 917 transitions. Second operand 7 states. [2019-10-13 21:11:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:39,764 INFO L93 Difference]: Finished difference Result 1127 states and 1807 transitions. [2019-10-13 21:11:39,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:39,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-10-13 21:11:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:39,775 INFO L225 Difference]: With dead ends: 1127 [2019-10-13 21:11:39,776 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:39,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 904 transitions. [2019-10-13 21:11:39,816 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 904 transitions. Word has length 118 [2019-10-13 21:11:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:39,816 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 904 transitions. [2019-10-13 21:11:39,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 904 transitions. [2019-10-13 21:11:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:11:39,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:39,824 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:39,824 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1033464967, now seen corresponding path program 1 times [2019-10-13 21:11:39,825 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:39,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915048417] [2019-10-13 21:11:39,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:40,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915048417] [2019-10-13 21:11:40,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:40,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508207755] [2019-10-13 21:11:40,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:40,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:40,075 INFO L87 Difference]: Start difference. First operand 572 states and 904 transitions. Second operand 7 states. [2019-10-13 21:11:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:40,159 INFO L93 Difference]: Finished difference Result 1115 states and 1781 transitions. [2019-10-13 21:11:40,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:40,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-10-13 21:11:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:40,166 INFO L225 Difference]: With dead ends: 1115 [2019-10-13 21:11:40,167 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:40,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 903 transitions. [2019-10-13 21:11:40,195 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 903 transitions. Word has length 118 [2019-10-13 21:11:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,196 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 903 transitions. [2019-10-13 21:11:40,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 903 transitions. [2019-10-13 21:11:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 21:11:40,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,200 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,200 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1197819858, now seen corresponding path program 1 times [2019-10-13 21:11:40,201 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585440945] [2019-10-13 21:11:40,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:40,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585440945] [2019-10-13 21:11:40,359 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:40,360 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833071228] [2019-10-13 21:11:40,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:40,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:40,361 INFO L87 Difference]: Start difference. First operand 572 states and 903 transitions. Second operand 5 states. [2019-10-13 21:11:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:40,433 INFO L93 Difference]: Finished difference Result 1114 states and 1778 transitions. [2019-10-13 21:11:40,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:40,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-13 21:11:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:40,439 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 21:11:40,439 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:40,442 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 902 transitions. [2019-10-13 21:11:40,518 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 902 transitions. Word has length 119 [2019-10-13 21:11:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,519 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 902 transitions. [2019-10-13 21:11:40,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 902 transitions. [2019-10-13 21:11:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:11:40,522 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,522 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,522 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2117874534, now seen corresponding path program 1 times [2019-10-13 21:11:40,523 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585731869] [2019-10-13 21:11:40,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:40,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585731869] [2019-10-13 21:11:40,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:40,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589326828] [2019-10-13 21:11:40,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:40,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:40,690 INFO L87 Difference]: Start difference. First operand 572 states and 902 transitions. Second operand 5 states. [2019-10-13 21:11:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:40,758 INFO L93 Difference]: Finished difference Result 1114 states and 1776 transitions. [2019-10-13 21:11:40,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:40,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-10-13 21:11:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:40,764 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 21:11:40,764 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:40,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 901 transitions. [2019-10-13 21:11:40,794 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 901 transitions. Word has length 120 [2019-10-13 21:11:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,795 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 901 transitions. [2019-10-13 21:11:40,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 901 transitions. [2019-10-13 21:11:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:11:40,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,799 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,799 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1349008403, now seen corresponding path program 1 times [2019-10-13 21:11:40,800 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354402647] [2019-10-13 21:11:40,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:40,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354402647] [2019-10-13 21:11:40,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:40,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564397102] [2019-10-13 21:11:40,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:40,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:40,933 INFO L87 Difference]: Start difference. First operand 572 states and 901 transitions. Second operand 5 states. [2019-10-13 21:11:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,002 INFO L93 Difference]: Finished difference Result 1114 states and 1774 transitions. [2019-10-13 21:11:41,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:41,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-13 21:11:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,009 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 21:11:41,009 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:41,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 900 transitions. [2019-10-13 21:11:41,038 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 900 transitions. Word has length 121 [2019-10-13 21:11:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,039 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 900 transitions. [2019-10-13 21:11:41,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 900 transitions. [2019-10-13 21:11:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:11:41,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,045 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,045 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1487182357, now seen corresponding path program 1 times [2019-10-13 21:11:41,046 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138470673] [2019-10-13 21:11:41,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:41,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138470673] [2019-10-13 21:11:41,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:41,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:41,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748918427] [2019-10-13 21:11:41,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:41,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:41,245 INFO L87 Difference]: Start difference. First operand 572 states and 900 transitions. Second operand 5 states. [2019-10-13 21:11:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,342 INFO L93 Difference]: Finished difference Result 1114 states and 1772 transitions. [2019-10-13 21:11:41,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:41,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2019-10-13 21:11:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,351 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 21:11:41,352 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:41,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 899 transitions. [2019-10-13 21:11:41,385 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 899 transitions. Word has length 122 [2019-10-13 21:11:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,386 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 899 transitions. [2019-10-13 21:11:41,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 899 transitions. [2019-10-13 21:11:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:11:41,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,391 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,392 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1599417670, now seen corresponding path program 1 times [2019-10-13 21:11:41,393 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061482616] [2019-10-13 21:11:41,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:41,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061482616] [2019-10-13 21:11:41,670 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:41,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 21:11:41,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716749403] [2019-10-13 21:11:41,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:11:41,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:11:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:11:41,673 INFO L87 Difference]: Start difference. First operand 572 states and 899 transitions. Second operand 9 states. [2019-10-13 21:11:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,796 INFO L93 Difference]: Finished difference Result 1116 states and 1771 transitions. [2019-10-13 21:11:41,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:11:41,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-10-13 21:11:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,802 INFO L225 Difference]: With dead ends: 1116 [2019-10-13 21:11:41,802 INFO L226 Difference]: Without dead ends: 572 [2019-10-13 21:11:41,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-10-13 21:11:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2019-10-13 21:11:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-10-13 21:11:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 898 transitions. [2019-10-13 21:11:41,828 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 898 transitions. Word has length 123 [2019-10-13 21:11:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,829 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 898 transitions. [2019-10-13 21:11:41,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:11:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 898 transitions. [2019-10-13 21:11:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:11:41,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,833 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,833 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -309040120, now seen corresponding path program 1 times [2019-10-13 21:11:41,834 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688264108] [2019-10-13 21:11:41,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:11:42,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688264108] [2019-10-13 21:11:42,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539971735] [2019-10-13 21:11:42,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:42,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:11:42,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:42,823 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:42,951 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:42,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:11:42,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442475736] [2019-10-13 21:11:42,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:42,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:42,954 INFO L87 Difference]: Start difference. First operand 572 states and 898 transitions. Second operand 3 states. [2019-10-13 21:11:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:43,052 INFO L93 Difference]: Finished difference Result 1592 states and 2552 transitions. [2019-10-13 21:11:43,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:43,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-13 21:11:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:43,062 INFO L225 Difference]: With dead ends: 1592 [2019-10-13 21:11:43,062 INFO L226 Difference]: Without dead ends: 1054 [2019-10-13 21:11:43,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-13 21:11:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1041. [2019-10-13 21:11:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2019-10-13 21:11:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1657 transitions. [2019-10-13 21:11:43,119 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1657 transitions. Word has length 123 [2019-10-13 21:11:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:43,119 INFO L462 AbstractCegarLoop]: Abstraction has 1041 states and 1657 transitions. [2019-10-13 21:11:43,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1657 transitions. [2019-10-13 21:11:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:11:43,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:43,124 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:43,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:43,340 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash 353455773, now seen corresponding path program 1 times [2019-10-13 21:11:43,341 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:43,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612260070] [2019-10-13 21:11:43,342 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,342 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:11:43,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612260070] [2019-10-13 21:11:43,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253375924] [2019-10-13 21:11:43,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:44,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:11:44,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:44,226 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:44,346 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:44,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:11:44,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566692350] [2019-10-13 21:11:44,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:44,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:44,349 INFO L87 Difference]: Start difference. First operand 1041 states and 1657 transitions. Second operand 3 states. [2019-10-13 21:11:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:44,500 INFO L93 Difference]: Finished difference Result 2530 states and 4072 transitions. [2019-10-13 21:11:44,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:44,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-13 21:11:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:44,516 INFO L225 Difference]: With dead ends: 2530 [2019-10-13 21:11:44,516 INFO L226 Difference]: Without dead ends: 1523 [2019-10-13 21:11:44,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2019-10-13 21:11:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1474. [2019-10-13 21:11:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2019-10-13 21:11:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2370 transitions. [2019-10-13 21:11:44,634 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2370 transitions. Word has length 124 [2019-10-13 21:11:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:44,635 INFO L462 AbstractCegarLoop]: Abstraction has 1474 states and 2370 transitions. [2019-10-13 21:11:44,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2370 transitions. [2019-10-13 21:11:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:11:44,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:44,645 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:44,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:44,856 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1484756798, now seen corresponding path program 1 times [2019-10-13 21:11:44,856 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:44,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676804772] [2019-10-13 21:11:44,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:44,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:44,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:45,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676804772] [2019-10-13 21:11:45,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:45,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:45,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805110907] [2019-10-13 21:11:45,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:45,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:45,061 INFO L87 Difference]: Start difference. First operand 1474 states and 2370 transitions. Second operand 7 states. [2019-10-13 21:11:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:48,412 INFO L93 Difference]: Finished difference Result 4344 states and 7131 transitions. [2019-10-13 21:11:48,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:11:48,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-10-13 21:11:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:48,446 INFO L225 Difference]: With dead ends: 4344 [2019-10-13 21:11:48,446 INFO L226 Difference]: Without dead ends: 2904 [2019-10-13 21:11:48,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:11:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2019-10-13 21:11:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2834. [2019-10-13 21:11:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 21:11:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 4634 transitions. [2019-10-13 21:11:48,659 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 4634 transitions. Word has length 126 [2019-10-13 21:11:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:48,662 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 4634 transitions. [2019-10-13 21:11:48,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 4634 transitions. [2019-10-13 21:11:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:11:48,669 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:48,669 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:48,670 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 612328635, now seen corresponding path program 1 times [2019-10-13 21:11:48,671 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:48,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914012463] [2019-10-13 21:11:48,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:48,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:48,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:11:48,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914012463] [2019-10-13 21:11:48,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354442800] [2019-10-13 21:11:48,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:49,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:11:49,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:49,565 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:49,719 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:49,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [11] total 14 [2019-10-13 21:11:49,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274504658] [2019-10-13 21:11:49,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:49,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:49,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:49,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:49,721 INFO L87 Difference]: Start difference. First operand 2834 states and 4634 transitions. Second operand 5 states. [2019-10-13 21:11:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:52,161 INFO L93 Difference]: Finished difference Result 13026 states and 21545 transitions. [2019-10-13 21:11:52,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:52,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-10-13 21:11:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:52,253 INFO L225 Difference]: With dead ends: 13026 [2019-10-13 21:11:52,253 INFO L226 Difference]: Without dead ends: 10227 [2019-10-13 21:11:52,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2019-10-13 21:11:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 10107. [2019-10-13 21:11:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10107 states. [2019-10-13 21:11:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 16392 transitions. [2019-10-13 21:11:52,782 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 16392 transitions. Word has length 127 [2019-10-13 21:11:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:52,783 INFO L462 AbstractCegarLoop]: Abstraction has 10107 states and 16392 transitions. [2019-10-13 21:11:52,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 16392 transitions. [2019-10-13 21:11:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:11:52,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:52,793 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:53,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:53,012 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1829505526, now seen corresponding path program 1 times [2019-10-13 21:11:53,013 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:53,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49025815] [2019-10-13 21:11:53,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:53,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:53,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:11:53,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49025815] [2019-10-13 21:11:53,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134056280] [2019-10-13 21:11:53,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:53,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 3021 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:11:53,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:53,875 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:53,983 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:53,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 11 [2019-10-13 21:11:53,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669053024] [2019-10-13 21:11:53,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:53,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:53,985 INFO L87 Difference]: Start difference. First operand 10107 states and 16392 transitions. Second operand 3 states. [2019-10-13 21:11:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:55,286 INFO L93 Difference]: Finished difference Result 28008 states and 45865 transitions. [2019-10-13 21:11:55,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:55,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-13 21:11:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:55,464 INFO L225 Difference]: With dead ends: 28008 [2019-10-13 21:11:55,465 INFO L226 Difference]: Without dead ends: 18020 [2019-10-13 21:11:55,521 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18020 states. [2019-10-13 21:11:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18020 to 17854. [2019-10-13 21:11:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17854 states. [2019-10-13 21:11:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 28984 transitions. [2019-10-13 21:11:56,371 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 28984 transitions. Word has length 132 [2019-10-13 21:11:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:56,373 INFO L462 AbstractCegarLoop]: Abstraction has 17854 states and 28984 transitions. [2019-10-13 21:11:56,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 28984 transitions. [2019-10-13 21:11:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:11:56,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:56,380 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:56,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:56,588 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1185598092, now seen corresponding path program 1 times [2019-10-13 21:11:56,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:56,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025456355] [2019-10-13 21:11:56,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:56,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:56,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:11:56,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025456355] [2019-10-13 21:11:56,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470225436] [2019-10-13 21:11:56,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:57,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 21:11:57,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:57,666 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:57,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:11:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:57,935 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:57,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-10-13 21:11:57,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235597108] [2019-10-13 21:11:57,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:11:57,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:11:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:11:57,938 INFO L87 Difference]: Start difference. First operand 17854 states and 28984 transitions. Second operand 11 states.