/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec14_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:07:32,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:07:32,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:07:32,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:07:32,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:07:32,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:07:32,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:07:32,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:07:32,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:07:32,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:07:32,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:07:32,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:07:32,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:07:32,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:07:32,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:07:32,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:07:32,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:07:32,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:07:32,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:07:32,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:07:32,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:07:32,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:07:32,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:07:32,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:07:32,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:07:32,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:07:32,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:07:32,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:07:32,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:07:32,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:07:32,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:07:32,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:07:32,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:07:32,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:07:32,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:07:32,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:07:32,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:07:32,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:07:32,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:07:32,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:07:32,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:07:32,660 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 [2019-11-07 04:07:32,675 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:07:32,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:07:32,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:07:32,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:07:32,677 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:07:32,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:07:32,677 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:07:32,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:07:32,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:07:32,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:07:32,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:07:32,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:07:32,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:07:32,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:07:32,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:07:32,679 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:07:32,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:07:32,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:07:32,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:07:32,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:07:32,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:07:32,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:32,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:07:32,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:07:32,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:07:32,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:07:32,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:07:32,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:07:32,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:07:33,021 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:07:33,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:07:33,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:07:33,047 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:07:33,047 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:07:33,048 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product20.cil.c [2019-11-07 04:07:33,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3257c36e8/8e5248f1b32644e58569ea7b64ac96b6/FLAGfc97e09f6 [2019-11-07 04:07:33,768 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:07:33,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product20.cil.c [2019-11-07 04:07:33,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3257c36e8/8e5248f1b32644e58569ea7b64ac96b6/FLAGfc97e09f6 [2019-11-07 04:07:33,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3257c36e8/8e5248f1b32644e58569ea7b64ac96b6 [2019-11-07 04:07:33,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:07:33,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:07:33,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:33,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:07:33,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:07:33,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100a49f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33, skipping insertion in model container [2019-11-07 04:07:33,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:34,014 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:07:34,153 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:07:34,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:34,912 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:07:35,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:35,077 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:07:35,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35 WrapperNode [2019-11-07 04:07:35,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:35,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:07:35,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:07:35,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:07:35,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (1/1) ... [2019-11-07 04:07:35,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:07:35,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:07:35,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:07:35,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:07:35,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (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 [2019-11-07 04:07:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:07:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:07:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:07:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:07:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:07:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:07:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:07:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:07:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:07:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:07:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:07:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:07:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:07:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:07:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:07:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:07:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:07:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:07:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:07:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:07:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:07:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:07:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:07:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:07:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:07:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:07:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:07:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:07:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:07:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:07:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:07:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:07:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:07:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:07:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:07:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:07:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:07:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:07:35,380 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:07:35,380 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:07:35,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:07:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 04:07:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:07:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 04:07:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:07:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:07:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:07:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:07:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:07:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:07:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:07:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:07:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:07:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:07:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:07:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:07:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:07:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:07:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:07:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:07:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:07:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:07:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:07:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:07:35,390 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:07:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:07:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:07:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:07:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:07:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:07:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:07:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:07:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:07:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:07:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:07:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:07:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:07:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:07:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:07:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:07:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:07:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:07:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:07:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:07:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:07:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:07:35,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:07:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:07:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:07:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:07:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:07:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:07:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:07:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:07:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:07:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:07:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:07:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:07:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:07:35,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:07:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 04:07:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 04:07:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:07:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:07:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:07:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:07:40,097 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:07:40,098 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:07:40,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:40 BoogieIcfgContainer [2019-11-07 04:07:40,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:07:40,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:07:40,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:07:40,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:07:40,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:07:33" (1/3) ... [2019-11-07 04:07:40,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f1fd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:40, skipping insertion in model container [2019-11-07 04:07:40,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:35" (2/3) ... [2019-11-07 04:07:40,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f1fd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:40, skipping insertion in model container [2019-11-07 04:07:40,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:40" (3/3) ... [2019-11-07 04:07:40,112 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2019-11-07 04:07:40,123 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:07:40,135 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:07:40,147 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:07:40,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:07:40,189 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:07:40,189 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:07:40,189 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:07:40,189 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:07:40,190 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:07:40,190 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:07:40,190 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:07:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states. [2019-11-07 04:07:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-07 04:07:40,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:40,294 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:07:40,297 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:40,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1065410639, now seen corresponding path program 1 times [2019-11-07 04:07:40,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:40,313 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296700773] [2019-11-07 04:07:40,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:07:41,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296700773] [2019-11-07 04:07:41,036 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:41,036 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:07:41,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908228430] [2019-11-07 04:07:41,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:07:41,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:07:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:07:41,061 INFO L87 Difference]: Start difference. First operand 555 states. Second operand 3 states. [2019-11-07 04:07:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:41,396 INFO L93 Difference]: Finished difference Result 1247 states and 1886 transitions. [2019-11-07 04:07:41,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:07:41,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-11-07 04:07:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:41,424 INFO L225 Difference]: With dead ends: 1247 [2019-11-07 04:07:41,424 INFO L226 Difference]: Without dead ends: 820 [2019-11-07 04:07:41,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:07:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-11-07 04:07:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 777. [2019-11-07 04:07:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2019-11-07 04:07:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1170 transitions. [2019-11-07 04:07:41,585 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1170 transitions. Word has length 72 [2019-11-07 04:07:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:41,586 INFO L462 AbstractCegarLoop]: Abstraction has 777 states and 1170 transitions. [2019-11-07 04:07:41,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:07:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1170 transitions. [2019-11-07 04:07:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 04:07:41,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:41,607 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:07:41,607 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1023678644, now seen corresponding path program 1 times [2019-11-07 04:07:41,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:41,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882636064] [2019-11-07 04:07:41,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 04:07:41,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882636064] [2019-11-07 04:07:41,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:41,980 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:07:41,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735488295] [2019-11-07 04:07:41,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:41,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:41,996 INFO L87 Difference]: Start difference. First operand 777 states and 1170 transitions. Second operand 7 states. [2019-11-07 04:07:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:45,860 INFO L93 Difference]: Finished difference Result 2343 states and 3590 transitions. [2019-11-07 04:07:45,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:07:45,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-11-07 04:07:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:45,874 INFO L225 Difference]: With dead ends: 2343 [2019-11-07 04:07:45,875 INFO L226 Difference]: Without dead ends: 1597 [2019-11-07 04:07:45,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2019-11-07 04:07:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1535. [2019-11-07 04:07:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2019-11-07 04:07:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2343 transitions. [2019-11-07 04:07:46,046 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2343 transitions. Word has length 120 [2019-11-07 04:07:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:46,050 INFO L462 AbstractCegarLoop]: Abstraction has 1535 states and 2343 transitions. [2019-11-07 04:07:46,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2343 transitions. [2019-11-07 04:07:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 04:07:46,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:46,061 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:46,061 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1282395387, now seen corresponding path program 1 times [2019-11-07 04:07:46,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:46,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395548826] [2019-11-07 04:07:46,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:07:46,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395548826] [2019-11-07 04:07:46,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056876876] [2019-11-07 04:07:46,327 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 [2019-11-07 04:07:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:46,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 04:07:46,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:07:47,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:07:47,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:47,400 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-11-07 04:07:47,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010248605] [2019-11-07 04:07:47,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:07:47,402 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:07:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:07:47,403 INFO L87 Difference]: Start difference. First operand 1535 states and 2343 transitions. Second operand 6 states. [2019-11-07 04:07:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:48,145 INFO L93 Difference]: Finished difference Result 3319 states and 5048 transitions. [2019-11-07 04:07:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:07:48,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-07 04:07:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:48,164 INFO L225 Difference]: With dead ends: 3319 [2019-11-07 04:07:48,165 INFO L226 Difference]: Without dead ends: 1814 [2019-11-07 04:07:48,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:07:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2019-11-07 04:07:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1798. [2019-11-07 04:07:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1798 states. [2019-11-07 04:07:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2668 transitions. [2019-11-07 04:07:48,310 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2668 transitions. Word has length 123 [2019-11-07 04:07:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:48,312 INFO L462 AbstractCegarLoop]: Abstraction has 1798 states and 2668 transitions. [2019-11-07 04:07:48,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:07:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2668 transitions. [2019-11-07 04:07:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 04:07:48,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:48,318 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:48,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:48,526 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1561507645, now seen corresponding path program 1 times [2019-11-07 04:07:48,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:48,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065202851] [2019-11-07 04:07:48,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:07:48,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065202851] [2019-11-07 04:07:48,848 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:48,849 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 04:07:48,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122065564] [2019-11-07 04:07:48,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:07:48,850 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:07:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:07:48,851 INFO L87 Difference]: Start difference. First operand 1798 states and 2668 transitions. Second operand 9 states. [2019-11-07 04:07:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:52,565 INFO L93 Difference]: Finished difference Result 1977 states and 2950 transitions. [2019-11-07 04:07:52,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:07:52,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-11-07 04:07:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:52,580 INFO L225 Difference]: With dead ends: 1977 [2019-11-07 04:07:52,581 INFO L226 Difference]: Without dead ends: 1974 [2019-11-07 04:07:52,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:07:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2019-11-07 04:07:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1894. [2019-11-07 04:07:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2019-11-07 04:07:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2827 transitions. [2019-11-07 04:07:52,686 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2827 transitions. Word has length 124 [2019-11-07 04:07:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:52,687 INFO L462 AbstractCegarLoop]: Abstraction has 1894 states and 2827 transitions. [2019-11-07 04:07:52,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 04:07:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2827 transitions. [2019-11-07 04:07:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-07 04:07:52,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:52,693 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:52,693 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1363237341, now seen corresponding path program 1 times [2019-11-07 04:07:52,694 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:52,694 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812370266] [2019-11-07 04:07:52,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-07 04:07:52,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812370266] [2019-11-07 04:07:52,865 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:52,865 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:07:52,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147175194] [2019-11-07 04:07:52,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:52,866 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:52,867 INFO L87 Difference]: Start difference. First operand 1894 states and 2827 transitions. Second operand 5 states. [2019-11-07 04:07:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:52,968 INFO L93 Difference]: Finished difference Result 3781 states and 5691 transitions. [2019-11-07 04:07:52,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:52,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-11-07 04:07:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:52,984 INFO L225 Difference]: With dead ends: 3781 [2019-11-07 04:07:52,984 INFO L226 Difference]: Without dead ends: 1918 [2019-11-07 04:07:52,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2019-11-07 04:07:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1918. [2019-11-07 04:07:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2019-11-07 04:07:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2851 transitions. [2019-11-07 04:07:53,099 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2851 transitions. Word has length 160 [2019-11-07 04:07:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:53,100 INFO L462 AbstractCegarLoop]: Abstraction has 1918 states and 2851 transitions. [2019-11-07 04:07:53,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2851 transitions. [2019-11-07 04:07:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 04:07:53,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:53,106 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:53,107 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1035764282, now seen corresponding path program 1 times [2019-11-07 04:07:53,107 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:53,107 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874769007] [2019-11-07 04:07:53,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-07 04:07:53,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874769007] [2019-11-07 04:07:53,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606854425] [2019-11-07 04:07:53,420 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 [2019-11-07 04:07:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:54,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 3174 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:54,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 04:07:54,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-07 04:07:54,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:54,343 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 04:07:54,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185042126] [2019-11-07 04:07:54,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:54,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:07:54,345 INFO L87 Difference]: Start difference. First operand 1918 states and 2851 transitions. Second operand 4 states. [2019-11-07 04:07:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:54,601 INFO L93 Difference]: Finished difference Result 3961 states and 6030 transitions. [2019-11-07 04:07:54,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:54,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-11-07 04:07:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:54,618 INFO L225 Difference]: With dead ends: 3961 [2019-11-07 04:07:54,618 INFO L226 Difference]: Without dead ends: 2074 [2019-11-07 04:07:54,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-07 04:07:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-07 04:07:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-07 04:07:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3143 transitions. [2019-11-07 04:07:54,795 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3143 transitions. Word has length 165 [2019-11-07 04:07:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:54,796 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3143 transitions. [2019-11-07 04:07:54,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3143 transitions. [2019-11-07 04:07:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 04:07:54,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:54,812 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:55,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:55,024 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash 493138988, now seen corresponding path program 1 times [2019-11-07 04:07:55,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:55,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553088229] [2019-11-07 04:07:55,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 04:07:55,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553088229] [2019-11-07 04:07:55,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952290716] [2019-11-07 04:07:55,458 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 [2019-11-07 04:07:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:56,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:56,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:07:56,091 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 04:07:56,296 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:56,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:07:56,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684200936] [2019-11-07 04:07:56,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:56,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:56,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:56,299 INFO L87 Difference]: Start difference. First operand 2074 states and 3143 transitions. Second operand 4 states. [2019-11-07 04:07:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:56,555 INFO L93 Difference]: Finished difference Result 4273 states and 6610 transitions. [2019-11-07 04:07:56,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:56,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-11-07 04:07:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:56,570 INFO L225 Difference]: With dead ends: 4273 [2019-11-07 04:07:56,570 INFO L226 Difference]: Without dead ends: 2230 [2019-11-07 04:07:56,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2019-11-07 04:07:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2230. [2019-11-07 04:07:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2019-11-07 04:07:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3435 transitions. [2019-11-07 04:07:56,702 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3435 transitions. Word has length 170 [2019-11-07 04:07:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:56,703 INFO L462 AbstractCegarLoop]: Abstraction has 2230 states and 3435 transitions. [2019-11-07 04:07:56,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3435 transitions. [2019-11-07 04:07:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 04:07:56,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:56,712 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:57,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:57,026 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1603404964, now seen corresponding path program 1 times [2019-11-07 04:07:57,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:57,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724134870] [2019-11-07 04:07:57,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-07 04:07:57,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724134870] [2019-11-07 04:07:57,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066754487] [2019-11-07 04:07:57,200 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 [2019-11-07 04:07:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:57,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:57,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 04:07:57,996 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-07 04:07:58,220 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:58,220 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:07:58,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108223758] [2019-11-07 04:07:58,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:58,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:58,226 INFO L87 Difference]: Start difference. First operand 2230 states and 3435 transitions. Second operand 4 states. [2019-11-07 04:07:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:58,467 INFO L93 Difference]: Finished difference Result 4585 states and 7190 transitions. [2019-11-07 04:07:58,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:58,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-11-07 04:07:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:58,487 INFO L225 Difference]: With dead ends: 4585 [2019-11-07 04:07:58,487 INFO L226 Difference]: Without dead ends: 2386 [2019-11-07 04:07:58,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2019-11-07 04:07:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2386. [2019-11-07 04:07:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2386 states. [2019-11-07 04:07:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 3727 transitions. [2019-11-07 04:07:58,656 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 3727 transitions. Word has length 174 [2019-11-07 04:07:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:58,657 INFO L462 AbstractCegarLoop]: Abstraction has 2386 states and 3727 transitions. [2019-11-07 04:07:58,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 3727 transitions. [2019-11-07 04:07:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 04:07:58,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:58,668 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:58,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:58,880 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1177090278, now seen corresponding path program 1 times [2019-11-07 04:07:58,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:58,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322334766] [2019-11-07 04:07:58,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:07:59,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322334766] [2019-11-07 04:07:59,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33575015] [2019-11-07 04:07:59,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 04:07:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:59,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:59,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 04:08:00,037 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:08:00,269 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:08:00,270 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:08:00,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628026523] [2019-11-07 04:08:00,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:00,271 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:08:00,272 INFO L87 Difference]: Start difference. First operand 2386 states and 3727 transitions. Second operand 4 states. [2019-11-07 04:08:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:00,579 INFO L93 Difference]: Finished difference Result 4897 states and 7770 transitions. [2019-11-07 04:08:00,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:00,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-11-07 04:08:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:00,598 INFO L225 Difference]: With dead ends: 4897 [2019-11-07 04:08:00,598 INFO L226 Difference]: Without dead ends: 2542 [2019-11-07 04:08:00,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:08:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2019-11-07 04:08:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2542. [2019-11-07 04:08:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2542 states. [2019-11-07 04:08:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 4019 transitions. [2019-11-07 04:08:00,716 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 4019 transitions. Word has length 177 [2019-11-07 04:08:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:00,718 INFO L462 AbstractCegarLoop]: Abstraction has 2542 states and 4019 transitions. [2019-11-07 04:08:00,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 4019 transitions. [2019-11-07 04:08:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 04:08:00,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:00,728 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:00,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:00,944 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 131479274, now seen corresponding path program 1 times [2019-11-07 04:08:00,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:00,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981524114] [2019-11-07 04:08:00,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:08:01,155 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981524114] [2019-11-07 04:08:01,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:01,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:08:01,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859666762] [2019-11-07 04:08:01,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:08:01,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:08:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:08:01,157 INFO L87 Difference]: Start difference. First operand 2542 states and 4019 transitions. Second operand 4 states. [2019-11-07 04:08:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:01,875 INFO L93 Difference]: Finished difference Result 5221 states and 8346 transitions. [2019-11-07 04:08:01,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:08:01,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-11-07 04:08:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:01,894 INFO L225 Difference]: With dead ends: 5221 [2019-11-07 04:08:01,894 INFO L226 Difference]: Without dead ends: 2678 [2019-11-07 04:08:01,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:08:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2019-11-07 04:08:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2678. [2019-11-07 04:08:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2678 states. [2019-11-07 04:08:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 4091 transitions. [2019-11-07 04:08:02,022 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 4091 transitions. Word has length 179 [2019-11-07 04:08:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:02,023 INFO L462 AbstractCegarLoop]: Abstraction has 2678 states and 4091 transitions. [2019-11-07 04:08:02,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:08:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 4091 transitions. [2019-11-07 04:08:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 04:08:02,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:02,035 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:02,035 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash 716051481, now seen corresponding path program 1 times [2019-11-07 04:08:02,036 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:02,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398370630] [2019-11-07 04:08:02,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:08:02,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398370630] [2019-11-07 04:08:02,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:08:02,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 04:08:02,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908166071] [2019-11-07 04:08:02,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:08:02,310 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:08:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:08:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:08:02,311 INFO L87 Difference]: Start difference. First operand 2678 states and 4091 transitions. Second operand 9 states.