/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:43:38,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:43:38,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:43:38,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:43:38,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:43:38,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:43:38,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:43:38,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:43:38,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:43:38,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:43:38,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:43:38,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:43:38,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:43:38,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:43:38,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:43:38,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:43:38,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:43:38,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:43:38,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:43:38,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:43:38,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:43:38,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:43:38,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:43:38,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:43:38,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:43:38,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:43:38,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:43:38,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:43:38,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:43:38,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:43:38,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:43:38,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:43:38,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:43:38,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:43:38,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:43:38,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:43:38,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:43:38,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:43:38,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:43:38,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:43:38,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:43:38,349 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 00:43:38,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:43:38,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:43:38,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:43:38,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:43:38,372 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:43:38,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:43:38,373 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:43:38,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:43:38,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:43:38,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:43:38,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:43:38,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:43:38,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:43:38,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:43:38,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:43:38,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:43:38,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:38,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:43:38,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:43:38,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:43:38,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:43:38,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:43:38,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:43:38,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:43:38,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:43:38,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:43:38,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:43:38,695 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:43:38,695 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:43:38,696 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product20.cil.c [2019-11-07 00:43:38,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a724f0ce/4205b18feddb4b1eaa131a995002ad42/FLAGeae5f12f6 [2019-11-07 00:43:39,458 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:43:39,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product20.cil.c [2019-11-07 00:43:39,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a724f0ce/4205b18feddb4b1eaa131a995002ad42/FLAGeae5f12f6 [2019-11-07 00:43:39,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a724f0ce/4205b18feddb4b1eaa131a995002ad42 [2019-11-07 00:43:39,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:43:39,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:43:39,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:39,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:43:39,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:43:39,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:39" (1/1) ... [2019-11-07 00:43:39,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8571ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:39, skipping insertion in model container [2019-11-07 00:43:39,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:39" (1/1) ... [2019-11-07 00:43:39,659 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:43:39,733 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:43:40,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:40,558 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:43:40,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:40,759 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:43:40,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40 WrapperNode [2019-11-07 00:43:40,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:40,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:43:40,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:43:40,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:43:40,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (1/1) ... [2019-11-07 00:43:40,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:43:40,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:43:40,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:43:40,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:43:40,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (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 00:43:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:43:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:43:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:43:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:43:41,044 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:43:41,044 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:43:41,044 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:43:41,045 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:43:41,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:43:41,045 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:43:41,046 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:43:41,046 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:43:41,047 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:43:41,047 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:43:41,047 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:43:41,049 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:43:41,049 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:43:41,049 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:43:41,050 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:43:41,050 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:43:41,050 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:43:41,050 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:43:41,050 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:43:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:43:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:43:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:43:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:43:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:43:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 00:43:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:43:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:43:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:43:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:43:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:41,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:43:41,055 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:43:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:43:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:43:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:43:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:43:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:43:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:43:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:43:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:43:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:43:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:43:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:43:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:43:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:43:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:43:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:43:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:43:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:43:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:43:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:43:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:43:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:43:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:43:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:43:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:43:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:43:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:43:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:43:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:43:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 00:43:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:43:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:43:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:43:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:43:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:43:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:43:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:43:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:43:41,073 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:43:41,074 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:43:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:43:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:43:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:43:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:43:43,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:43:43,450 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:43:43,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:43 BoogieIcfgContainer [2019-11-07 00:43:43,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:43:43,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:43:43,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:43:43,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:43:43,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:43:39" (1/3) ... [2019-11-07 00:43:43,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9634b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:43, skipping insertion in model container [2019-11-07 00:43:43,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:40" (2/3) ... [2019-11-07 00:43:43,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9634b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:43, skipping insertion in model container [2019-11-07 00:43:43,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:43" (3/3) ... [2019-11-07 00:43:43,461 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product20.cil.c [2019-11-07 00:43:43,471 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:43:43,482 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:43:43,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:43:43,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:43:43,538 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:43:43,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:43:43,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:43:43,538 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:43:43,538 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:43:43,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:43:43,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:43:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states. [2019-11-07 00:43:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 00:43:43,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:43,615 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:43,618 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash 728591762, now seen corresponding path program 1 times [2019-11-07 00:43:43,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:43,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120230251] [2019-11-07 00:43:43,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:44,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120230251] [2019-11-07 00:43:44,311 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:44,311 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:44,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962033873] [2019-11-07 00:43:44,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:44,320 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:44,339 INFO L87 Difference]: Start difference. First operand 809 states. Second operand 7 states. [2019-11-07 00:43:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:44,652 INFO L93 Difference]: Finished difference Result 1283 states and 2064 transitions. [2019-11-07 00:43:44,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:44,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2019-11-07 00:43:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:44,694 INFO L225 Difference]: With dead ends: 1283 [2019-11-07 00:43:44,694 INFO L226 Difference]: Without dead ends: 650 [2019-11-07 00:43:44,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-11-07 00:43:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2019-11-07 00:43:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-11-07 00:43:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1027 transitions. [2019-11-07 00:43:44,830 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1027 transitions. Word has length 93 [2019-11-07 00:43:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:44,831 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1027 transitions. [2019-11-07 00:43:44,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1027 transitions. [2019-11-07 00:43:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:43:44,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:44,841 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:44,841 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2105197679, now seen corresponding path program 1 times [2019-11-07 00:43:44,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:44,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479545063] [2019-11-07 00:43:44,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:45,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479545063] [2019-11-07 00:43:45,064 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:45,064 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:45,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482279164] [2019-11-07 00:43:45,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:45,066 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:45,067 INFO L87 Difference]: Start difference. First operand 648 states and 1027 transitions. Second operand 4 states. [2019-11-07 00:43:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,139 INFO L93 Difference]: Finished difference Result 1262 states and 2019 transitions. [2019-11-07 00:43:45,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:45,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-07 00:43:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,146 INFO L225 Difference]: With dead ends: 1262 [2019-11-07 00:43:45,146 INFO L226 Difference]: Without dead ends: 630 [2019-11-07 00:43:45,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-11-07 00:43:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-11-07 00:43:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-11-07 00:43:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 994 transitions. [2019-11-07 00:43:45,212 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 994 transitions. Word has length 94 [2019-11-07 00:43:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:45,215 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 994 transitions. [2019-11-07 00:43:45,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 994 transitions. [2019-11-07 00:43:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:43:45,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:45,225 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:45,225 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1592349723, now seen corresponding path program 1 times [2019-11-07 00:43:45,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:45,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253057197] [2019-11-07 00:43:45,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:45,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253057197] [2019-11-07 00:43:45,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:45,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:45,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824187848] [2019-11-07 00:43:45,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:45,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:45,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:45,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:45,502 INFO L87 Difference]: Start difference. First operand 630 states and 994 transitions. Second operand 7 states. [2019-11-07 00:43:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,614 INFO L93 Difference]: Finished difference Result 1231 states and 1961 transitions. [2019-11-07 00:43:45,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:45,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-11-07 00:43:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,622 INFO L225 Difference]: With dead ends: 1231 [2019-11-07 00:43:45,622 INFO L226 Difference]: Without dead ends: 624 [2019-11-07 00:43:45,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2019-11-07 00:43:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2019-11-07 00:43:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2019-11-07 00:43:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 981 transitions. [2019-11-07 00:43:45,661 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 981 transitions. Word has length 94 [2019-11-07 00:43:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:45,662 INFO L462 AbstractCegarLoop]: Abstraction has 624 states and 981 transitions. [2019-11-07 00:43:45,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 981 transitions. [2019-11-07 00:43:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:43:45,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:45,667 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:45,668 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 444231126, now seen corresponding path program 1 times [2019-11-07 00:43:45,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:45,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185259318] [2019-11-07 00:43:45,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:45,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185259318] [2019-11-07 00:43:45,885 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:45,886 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:45,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234458508] [2019-11-07 00:43:45,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:45,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:45,888 INFO L87 Difference]: Start difference. First operand 624 states and 981 transitions. Second operand 7 states. [2019-11-07 00:43:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,982 INFO L93 Difference]: Finished difference Result 1219 states and 1935 transitions. [2019-11-07 00:43:45,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:45,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-11-07 00:43:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,988 INFO L225 Difference]: With dead ends: 1219 [2019-11-07 00:43:45,988 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:43:45,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:43:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:43:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:43:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 968 transitions. [2019-11-07 00:43:46,016 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 968 transitions. Word has length 95 [2019-11-07 00:43:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:46,017 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 968 transitions. [2019-11-07 00:43:46,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 968 transitions. [2019-11-07 00:43:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:43:46,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:46,019 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:46,019 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1352448671, now seen corresponding path program 1 times [2019-11-07 00:43:46,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:46,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251975951] [2019-11-07 00:43:46,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:46,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251975951] [2019-11-07 00:43:46,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:46,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:46,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795221992] [2019-11-07 00:43:46,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:46,206 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:46,207 INFO L87 Difference]: Start difference. First operand 618 states and 968 transitions. Second operand 7 states. [2019-11-07 00:43:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:46,389 INFO L93 Difference]: Finished difference Result 1207 states and 1909 transitions. [2019-11-07 00:43:46,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:46,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:43:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:46,398 INFO L225 Difference]: With dead ends: 1207 [2019-11-07 00:43:46,398 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:46,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 955 transitions. [2019-11-07 00:43:46,427 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 955 transitions. Word has length 96 [2019-11-07 00:43:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:46,429 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 955 transitions. [2019-11-07 00:43:46,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 955 transitions. [2019-11-07 00:43:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:43:46,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:46,431 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:46,431 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1553576800, now seen corresponding path program 1 times [2019-11-07 00:43:46,432 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:46,432 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954665084] [2019-11-07 00:43:46,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:46,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954665084] [2019-11-07 00:43:46,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:46,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:46,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690317851] [2019-11-07 00:43:46,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:46,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:46,602 INFO L87 Difference]: Start difference. First operand 612 states and 955 transitions. Second operand 7 states. [2019-11-07 00:43:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:46,721 INFO L93 Difference]: Finished difference Result 1195 states and 1883 transitions. [2019-11-07 00:43:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:46,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:43:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:46,729 INFO L225 Difference]: With dead ends: 1195 [2019-11-07 00:43:46,729 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:46,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 954 transitions. [2019-11-07 00:43:46,767 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 954 transitions. Word has length 96 [2019-11-07 00:43:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:46,767 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 954 transitions. [2019-11-07 00:43:46,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 954 transitions. [2019-11-07 00:43:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 00:43:46,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:46,773 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:46,773 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1582577178, now seen corresponding path program 1 times [2019-11-07 00:43:46,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:46,775 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930305126] [2019-11-07 00:43:46,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:46,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930305126] [2019-11-07 00:43:46,964 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:46,965 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:46,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545763544] [2019-11-07 00:43:46,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:46,967 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:46,967 INFO L87 Difference]: Start difference. First operand 612 states and 954 transitions. Second operand 5 states. [2019-11-07 00:43:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:47,045 INFO L93 Difference]: Finished difference Result 1194 states and 1880 transitions. [2019-11-07 00:43:47,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:47,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-11-07 00:43:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:47,050 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:43:47,051 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:47,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 953 transitions. [2019-11-07 00:43:47,078 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 953 transitions. Word has length 97 [2019-11-07 00:43:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:47,078 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 953 transitions. [2019-11-07 00:43:47,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 953 transitions. [2019-11-07 00:43:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 00:43:47,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:47,081 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:47,081 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1643629033, now seen corresponding path program 1 times [2019-11-07 00:43:47,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:47,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930670005] [2019-11-07 00:43:47,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:47,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930670005] [2019-11-07 00:43:47,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:47,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:47,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538024749] [2019-11-07 00:43:47,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:47,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:47,300 INFO L87 Difference]: Start difference. First operand 612 states and 953 transitions. Second operand 5 states. [2019-11-07 00:43:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:47,365 INFO L93 Difference]: Finished difference Result 1194 states and 1878 transitions. [2019-11-07 00:43:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:47,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-11-07 00:43:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:47,371 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:43:47,371 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:47,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 952 transitions. [2019-11-07 00:43:47,397 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 952 transitions. Word has length 98 [2019-11-07 00:43:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:47,397 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 952 transitions. [2019-11-07 00:43:47,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 952 transitions. [2019-11-07 00:43:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 00:43:47,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:47,400 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:47,401 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -205792939, now seen corresponding path program 1 times [2019-11-07 00:43:47,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:47,402 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112987202] [2019-11-07 00:43:47,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:47,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112987202] [2019-11-07 00:43:47,545 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:47,545 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:47,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450718604] [2019-11-07 00:43:47,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:47,546 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:47,546 INFO L87 Difference]: Start difference. First operand 612 states and 952 transitions. Second operand 5 states. [2019-11-07 00:43:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:47,617 INFO L93 Difference]: Finished difference Result 1194 states and 1876 transitions. [2019-11-07 00:43:47,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:47,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-07 00:43:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:47,623 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:43:47,624 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:47,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 951 transitions. [2019-11-07 00:43:47,654 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 951 transitions. Word has length 99 [2019-11-07 00:43:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:47,655 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 951 transitions. [2019-11-07 00:43:47,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 951 transitions. [2019-11-07 00:43:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 00:43:47,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:47,658 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:47,658 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1150361404, now seen corresponding path program 1 times [2019-11-07 00:43:47,659 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:47,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148072188] [2019-11-07 00:43:47,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:47,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148072188] [2019-11-07 00:43:47,779 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:47,779 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:47,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121023764] [2019-11-07 00:43:47,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:47,781 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:47,781 INFO L87 Difference]: Start difference. First operand 612 states and 951 transitions. Second operand 5 states. [2019-11-07 00:43:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:47,852 INFO L93 Difference]: Finished difference Result 1194 states and 1874 transitions. [2019-11-07 00:43:47,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:47,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-11-07 00:43:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:47,858 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:43:47,858 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:47,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 950 transitions. [2019-11-07 00:43:47,885 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 950 transitions. Word has length 100 [2019-11-07 00:43:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:47,885 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 950 transitions. [2019-11-07 00:43:47,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 950 transitions. [2019-11-07 00:43:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:43:47,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:47,887 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:47,887 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash 185725072, now seen corresponding path program 1 times [2019-11-07 00:43:47,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:47,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996225619] [2019-11-07 00:43:47,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:48,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996225619] [2019-11-07 00:43:48,252 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:48,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 00:43:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992164439] [2019-11-07 00:43:48,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:43:48,254 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:43:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:48,255 INFO L87 Difference]: Start difference. First operand 612 states and 950 transitions. Second operand 8 states. [2019-11-07 00:43:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:51,698 INFO L93 Difference]: Finished difference Result 2235 states and 3531 transitions. [2019-11-07 00:43:51,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:43:51,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2019-11-07 00:43:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:51,713 INFO L225 Difference]: With dead ends: 2235 [2019-11-07 00:43:51,713 INFO L226 Difference]: Without dead ends: 1657 [2019-11-07 00:43:51,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2019-11-07 00:43:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1645. [2019-11-07 00:43:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2019-11-07 00:43:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2558 transitions. [2019-11-07 00:43:51,801 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2558 transitions. Word has length 101 [2019-11-07 00:43:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:51,803 INFO L462 AbstractCegarLoop]: Abstraction has 1645 states and 2558 transitions. [2019-11-07 00:43:51,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:43:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2558 transitions. [2019-11-07 00:43:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:43:51,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:51,805 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:51,805 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 962074000, now seen corresponding path program 1 times [2019-11-07 00:43:51,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:51,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212703482] [2019-11-07 00:43:51,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:52,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212703482] [2019-11-07 00:43:52,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193291169] [2019-11-07 00:43:52,003 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 00:43:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:52,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:52,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:52,716 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:52,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:52,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:52,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875511198] [2019-11-07 00:43:52,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:52,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:52,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:52,854 INFO L87 Difference]: Start difference. First operand 1645 states and 2558 transitions. Second operand 3 states. [2019-11-07 00:43:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:53,033 INFO L93 Difference]: Finished difference Result 4748 states and 7510 transitions. [2019-11-07 00:43:53,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:53,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-11-07 00:43:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:53,066 INFO L225 Difference]: With dead ends: 4748 [2019-11-07 00:43:53,066 INFO L226 Difference]: Without dead ends: 3137 [2019-11-07 00:43:53,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2019-11-07 00:43:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3031. [2019-11-07 00:43:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3031 states. [2019-11-07 00:43:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4766 transitions. [2019-11-07 00:43:53,249 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4766 transitions. Word has length 101 [2019-11-07 00:43:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:53,249 INFO L462 AbstractCegarLoop]: Abstraction has 3031 states and 4766 transitions. [2019-11-07 00:43:53,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4766 transitions. [2019-11-07 00:43:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 00:43:53,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:53,251 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:53,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:53,461 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1335385152, now seen corresponding path program 1 times [2019-11-07 00:43:53,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:53,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506110527] [2019-11-07 00:43:53,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:53,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506110527] [2019-11-07 00:43:53,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875997241] [2019-11-07 00:43:53,851 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 00:43:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:54,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:54,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:54,536 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:54,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:54,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:54,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878690230] [2019-11-07 00:43:54,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:54,636 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:54,636 INFO L87 Difference]: Start difference. First operand 3031 states and 4766 transitions. Second operand 3 states. [2019-11-07 00:43:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:54,793 INFO L93 Difference]: Finished difference Result 6656 states and 10537 transitions. [2019-11-07 00:43:54,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:54,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-11-07 00:43:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:54,822 INFO L225 Difference]: With dead ends: 6656 [2019-11-07 00:43:54,822 INFO L226 Difference]: Without dead ends: 3659 [2019-11-07 00:43:54,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2019-11-07 00:43:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 3565. [2019-11-07 00:43:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3565 states. [2019-11-07 00:43:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5611 transitions. [2019-11-07 00:43:55,009 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5611 transitions. Word has length 102 [2019-11-07 00:43:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:55,009 INFO L462 AbstractCegarLoop]: Abstraction has 3565 states and 5611 transitions. [2019-11-07 00:43:55,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5611 transitions. [2019-11-07 00:43:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 00:43:55,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:55,011 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:55,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:55,219 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash -128546951, now seen corresponding path program 1 times [2019-11-07 00:43:55,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:55,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835890807] [2019-11-07 00:43:55,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:55,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835890807] [2019-11-07 00:43:55,352 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:55,352 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:55,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565808917] [2019-11-07 00:43:55,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:55,353 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:55,354 INFO L87 Difference]: Start difference. First operand 3565 states and 5611 transitions. Second operand 7 states. [2019-11-07 00:43:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:58,495 INFO L93 Difference]: Finished difference Result 10571 states and 17005 transitions. [2019-11-07 00:43:58,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:58,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2019-11-07 00:43:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:58,559 INFO L225 Difference]: With dead ends: 10571 [2019-11-07 00:43:58,560 INFO L226 Difference]: Without dead ends: 7040 [2019-11-07 00:43:58,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2019-11-07 00:43:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 6952. [2019-11-07 00:43:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6952 states. [2019-11-07 00:43:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6952 states to 6952 states and 11073 transitions. [2019-11-07 00:43:59,432 INFO L78 Accepts]: Start accepts. Automaton has 6952 states and 11073 transitions. Word has length 104 [2019-11-07 00:43:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:59,433 INFO L462 AbstractCegarLoop]: Abstraction has 6952 states and 11073 transitions. [2019-11-07 00:43:59,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6952 states and 11073 transitions. [2019-11-07 00:43:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 00:43:59,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:59,435 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:59,435 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 422139196, now seen corresponding path program 1 times [2019-11-07 00:43:59,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:59,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222224750] [2019-11-07 00:43:59,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:59,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222224750] [2019-11-07 00:43:59,540 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:59,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:59,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083756502] [2019-11-07 00:43:59,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:59,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:59,546 INFO L87 Difference]: Start difference. First operand 6952 states and 11073 transitions. Second operand 4 states. [2019-11-07 00:43:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:59,837 INFO L93 Difference]: Finished difference Result 13862 states and 22283 transitions. [2019-11-07 00:43:59,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:59,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-11-07 00:43:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:59,911 INFO L225 Difference]: With dead ends: 13862 [2019-11-07 00:43:59,911 INFO L226 Difference]: Without dead ends: 6944 [2019-11-07 00:43:59,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6944 states. [2019-11-07 00:44:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6944 to 6922. [2019-11-07 00:44:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6922 states. [2019-11-07 00:44:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 10985 transitions. [2019-11-07 00:44:00,248 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 10985 transitions. Word has length 105 [2019-11-07 00:44:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:00,249 INFO L462 AbstractCegarLoop]: Abstraction has 6922 states and 10985 transitions. [2019-11-07 00:44:00,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 10985 transitions. [2019-11-07 00:44:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 00:44:00,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:00,253 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:44:00,254 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash 53496904, now seen corresponding path program 1 times [2019-11-07 00:44:00,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:00,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945927004] [2019-11-07 00:44:00,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 00:44:00,467 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945927004] [2019-11-07 00:44:00,467 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:00,467 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:00,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440997866] [2019-11-07 00:44:00,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:00,469 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:00,470 INFO L87 Difference]: Start difference. First operand 6922 states and 10985 transitions. Second operand 7 states. [2019-11-07 00:44:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:03,698 INFO L93 Difference]: Finished difference Result 20720 states and 33722 transitions. [2019-11-07 00:44:03,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:03,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-07 00:44:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:03,794 INFO L225 Difference]: With dead ends: 20720 [2019-11-07 00:44:03,794 INFO L226 Difference]: Without dead ends: 13832 [2019-11-07 00:44:03,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:44:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13832 states. [2019-11-07 00:44:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13832 to 13704. [2019-11-07 00:44:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13704 states. [2019-11-07 00:44:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13704 states to 13704 states and 22139 transitions. [2019-11-07 00:44:04,448 INFO L78 Accepts]: Start accepts. Automaton has 13704 states and 22139 transitions. Word has length 113 [2019-11-07 00:44:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:04,450 INFO L462 AbstractCegarLoop]: Abstraction has 13704 states and 22139 transitions. [2019-11-07 00:44:04,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13704 states and 22139 transitions. [2019-11-07 00:44:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-07 00:44:04,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:04,452 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:04,452 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1202684267, now seen corresponding path program 1 times [2019-11-07 00:44:04,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:04,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117085056] [2019-11-07 00:44:04,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 00:44:04,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117085056] [2019-11-07 00:44:04,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:04,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:04,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293474271] [2019-11-07 00:44:04,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:04,565 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:04,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:04,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:04,565 INFO L87 Difference]: Start difference. First operand 13704 states and 22139 transitions. Second operand 4 states. [2019-11-07 00:44:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:04,998 INFO L93 Difference]: Finished difference Result 27436 states and 44785 transitions. [2019-11-07 00:44:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:04,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2019-11-07 00:44:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:05,090 INFO L225 Difference]: With dead ends: 27436 [2019-11-07 00:44:05,091 INFO L226 Difference]: Without dead ends: 13760 [2019-11-07 00:44:05,134 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 00:44:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13760 states. [2019-11-07 00:44:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13760 to 13712. [2019-11-07 00:44:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13712 states. [2019-11-07 00:44:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13712 states to 13712 states and 22090 transitions. [2019-11-07 00:44:05,776 INFO L78 Accepts]: Start accepts. Automaton has 13712 states and 22090 transitions. Word has length 114 [2019-11-07 00:44:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:05,777 INFO L462 AbstractCegarLoop]: Abstraction has 13712 states and 22090 transitions. [2019-11-07 00:44:05,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13712 states and 22090 transitions. [2019-11-07 00:44:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:44:05,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:05,779 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:05,780 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1104399514, now seen corresponding path program 1 times [2019-11-07 00:44:05,780 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:05,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33695556] [2019-11-07 00:44:05,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:44:06,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33695556] [2019-11-07 00:44:06,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:06,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805040887] [2019-11-07 00:44:06,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:06,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:06,600 INFO L87 Difference]: Start difference. First operand 13712 states and 22090 transitions. Second operand 7 states. [2019-11-07 00:44:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:10,160 INFO L93 Difference]: Finished difference Result 41206 states and 68517 transitions. [2019-11-07 00:44:10,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:10,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2019-11-07 00:44:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:10,322 INFO L225 Difference]: With dead ends: 41206 [2019-11-07 00:44:10,322 INFO L226 Difference]: Without dead ends: 27528 [2019-11-07 00:44:10,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:44:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27528 states. [2019-11-07 00:44:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27528 to 27332. [2019-11-07 00:44:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27332 states. [2019-11-07 00:44:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27332 states to 27332 states and 45230 transitions. [2019-11-07 00:44:11,408 INFO L78 Accepts]: Start accepts. Automaton has 27332 states and 45230 transitions. Word has length 123 [2019-11-07 00:44:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:11,409 INFO L462 AbstractCegarLoop]: Abstraction has 27332 states and 45230 transitions. [2019-11-07 00:44:11,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27332 states and 45230 transitions. [2019-11-07 00:44:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:44:11,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:11,410 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:44:11,411 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1662690101, now seen corresponding path program 1 times [2019-11-07 00:44:11,411 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:11,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351181589] [2019-11-07 00:44:11,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:44:11,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351181589] [2019-11-07 00:44:11,542 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:11,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:11,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822980108] [2019-11-07 00:44:11,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:11,544 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:11,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:11,545 INFO L87 Difference]: Start difference. First operand 27332 states and 45230 transitions. Second operand 4 states.