./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-09 23:16:45,707 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-09 23:16:45,708 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-09 23:16:45,716 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-09 23:16:45,716 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-09 23:16:45,717 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-09 23:16:45,718 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-09 23:16:45,719 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-09 23:16:45,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-09 23:16:45,721 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-09 23:16:45,722 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-09 23:16:45,722 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-09 23:16:45,722 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-09 23:16:45,723 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-09 23:16:45,724 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-09 23:16:45,725 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-09 23:16:45,725 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-09 23:16:45,727 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-09 23:16:45,728 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-09 23:16:45,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-09 23:16:45,730 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-09 23:16:45,731 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-09 23:16:45,732 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-09 23:16:45,733 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-09 23:16:45,733 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-09 23:16:45,734 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-09 23:16:45,735 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-09 23:16:45,735 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-09 23:16:45,736 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-09 23:16:45,736 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-09 23:16:45,736 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-09 23:16:45,737 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-09 23:16:45,737 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-09 23:16:45,737 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-09 23:16:45,738 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-09 23:16:45,738 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-09 23:16:45,738 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-09 23:16:45,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-09 23:16:45,746 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-09 23:16:45,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-09 23:16:45,747 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-09 23:16:45,748 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-09 23:16:45,748 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-09 23:16:45,748 INFO L133 SettingsManager]: * Use SBE=true [2018-11-09 23:16:45,748 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-09 23:16:45,749 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-09 23:16:45,750 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-09 23:16:45,750 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-09 23:16:45,751 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-09 23:16:45,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-09 23:16:45,752 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-11-09 23:16:45,780 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-09 23:16:45,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-09 23:16:45,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-09 23:16:45,794 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-09 23:16:45,794 INFO L276 PluginConnector]: CDTParser initialized [2018-11-09 23:16:45,794 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-09 23:16:45,844 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/data/cdf686a45/5c43324a64fb4acd8cb25ed81f2f939c/FLAG4bbf1a5d1 [2018-11-09 23:16:46,203 INFO L298 CDTParser]: Found 1 translation units. [2018-11-09 23:16:46,203 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-09 23:16:46,208 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/data/cdf686a45/5c43324a64fb4acd8cb25ed81f2f939c/FLAG4bbf1a5d1 [2018-11-09 23:16:46,220 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/data/cdf686a45/5c43324a64fb4acd8cb25ed81f2f939c [2018-11-09 23:16:46,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-09 23:16:46,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-09 23:16:46,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-09 23:16:46,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-09 23:16:46,228 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-09 23:16:46,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61258a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46, skipping insertion in model container [2018-11-09 23:16:46,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-09 23:16:46,251 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-09 23:16:46,370 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-09 23:16:46,373 INFO L189 MainTranslator]: Completed pre-run [2018-11-09 23:16:46,384 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-09 23:16:46,394 INFO L193 MainTranslator]: Completed translation [2018-11-09 23:16:46,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46 WrapperNode [2018-11-09 23:16:46,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-09 23:16:46,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-09 23:16:46,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-09 23:16:46,395 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-09 23:16:46,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... [2018-11-09 23:16:46,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-09 23:16:46,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-09 23:16:46,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-09 23:16:46,415 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-09 23:16:46,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/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 [2018-11-09 23:16:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-09 23:16:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-09 23:16:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-09 23:16:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-09 23:16:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-09 23:16:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-09 23:16:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-09 23:16:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-09 23:16:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-09 23:16:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-09 23:16:46,631 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-09 23:16:46,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:16:46 BoogieIcfgContainer [2018-11-09 23:16:46,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-09 23:16:46,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-09 23:16:46,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-09 23:16:46,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-09 23:16:46,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 11:16:46" (1/3) ... [2018-11-09 23:16:46,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b961b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:16:46, skipping insertion in model container [2018-11-09 23:16:46,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:16:46" (2/3) ... [2018-11-09 23:16:46,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b961b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:16:46, skipping insertion in model container [2018-11-09 23:16:46,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:16:46" (3/3) ... [2018-11-09 23:16:46,639 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-09 23:16:46,649 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-09 23:16:46,656 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-09 23:16:46,672 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-09 23:16:46,696 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-09 23:16:46,697 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-09 23:16:46,697 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-09 23:16:46,697 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-09 23:16:46,698 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-09 23:16:46,698 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-09 23:16:46,698 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-09 23:16:46,698 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-09 23:16:46,698 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-09 23:16:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-09 23:16:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-09 23:16:46,723 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:46,723 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:46,726 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:46,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-09 23:16:46,734 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:46,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:46,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:46,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:46,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:16:46,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-09 23:16:46,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-09 23:16:46,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-09 23:16:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-09 23:16:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-09 23:16:46,936 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-09 23:16:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:47,004 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-09 23:16:47,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-09 23:16:47,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-09 23:16:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:47,012 INFO L225 Difference]: With dead ends: 36 [2018-11-09 23:16:47,012 INFO L226 Difference]: Without dead ends: 22 [2018-11-09 23:16:47,015 INFO L605 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 [2018-11-09 23:16:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-09 23:16:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-09 23:16:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-09 23:16:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-09 23:16:47,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-09 23:16:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:47,045 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-09 23:16:47,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-09 23:16:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-09 23:16:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-09 23:16:47,046 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:47,046 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:47,047 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:47,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-11-09 23:16:47,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:47,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:47,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:16:47,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-09 23:16:47,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-09 23:16:47,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-09 23:16:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-09 23:16:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-09 23:16:47,089 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-11-09 23:16:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:47,149 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-11-09 23:16:47,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-09 23:16:47,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-09 23:16:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:47,150 INFO L225 Difference]: With dead ends: 28 [2018-11-09 23:16:47,150 INFO L226 Difference]: Without dead ends: 24 [2018-11-09 23:16:47,151 INFO L605 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 [2018-11-09 23:16:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-09 23:16:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-11-09 23:16:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-09 23:16:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-09 23:16:47,155 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-11-09 23:16:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:47,155 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-09 23:16:47,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-09 23:16:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-09 23:16:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-09 23:16:47,156 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:47,156 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:47,156 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:47,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-09 23:16:47,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:47,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:47,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-09 23:16:47,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:47,216 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:47,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-09 23:16:47,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:47,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-09 23:16:47,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-09 23:16:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-09 23:16:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-09 23:16:47,323 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-11-09 23:16:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:47,416 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-09 23:16:47,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-09 23:16:47,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-09 23:16:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:47,418 INFO L225 Difference]: With dead ends: 39 [2018-11-09 23:16:47,418 INFO L226 Difference]: Without dead ends: 24 [2018-11-09 23:16:47,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-09 23:16:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-09 23:16:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-09 23:16:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-09 23:16:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-09 23:16:47,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-09 23:16:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:47,425 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-09 23:16:47,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-09 23:16:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-09 23:16:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-09 23:16:47,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:47,426 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:47,427 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:47,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-09 23:16:47,427 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:47,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-09 23:16:47,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:47,475 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:47,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-09 23:16:47,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:47,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-09 23:16:47,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-09 23:16:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-09 23:16:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-09 23:16:47,527 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-11-09 23:16:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:47,597 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-11-09 23:16:47,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-09 23:16:47,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-09 23:16:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:47,599 INFO L225 Difference]: With dead ends: 33 [2018-11-09 23:16:47,599 INFO L226 Difference]: Without dead ends: 29 [2018-11-09 23:16:47,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-09 23:16:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-09 23:16:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-09 23:16:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-09 23:16:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-09 23:16:47,605 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-09 23:16:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:47,605 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-09 23:16:47,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-09 23:16:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-09 23:16:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-09 23:16:47,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:47,607 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:47,608 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:47,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:47,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-09 23:16:47,608 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:47,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:47,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:47,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-09 23:16:47,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:47,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:47,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-09 23:16:47,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-09 23:16:47,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:47,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-09 23:16:47,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:47,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-09 23:16:47,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-09 23:16:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-09 23:16:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-09 23:16:47,752 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 9 states. [2018-11-09 23:16:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:47,885 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2018-11-09 23:16:47,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-09 23:16:47,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-11-09 23:16:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:47,887 INFO L225 Difference]: With dead ends: 43 [2018-11-09 23:16:47,887 INFO L226 Difference]: Without dead ends: 37 [2018-11-09 23:16:47,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-11-09 23:16:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-09 23:16:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-09 23:16:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-09 23:16:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-11-09 23:16:47,896 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 41 [2018-11-09 23:16:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:47,896 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-11-09 23:16:47,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-09 23:16:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-11-09 23:16:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-09 23:16:47,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:47,899 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:47,899 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:47,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2018-11-09 23:16:47,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:47,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:47,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-09 23:16:48,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:48,062 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:48,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-09 23:16:48,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-09 23:16:48,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:48,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-09 23:16:48,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:48,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-09 23:16:48,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-09 23:16:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-09 23:16:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-09 23:16:48,185 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 12 states. [2018-11-09 23:16:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:48,406 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2018-11-09 23:16:48,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-09 23:16:48,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-09 23:16:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:48,408 INFO L225 Difference]: With dead ends: 77 [2018-11-09 23:16:48,408 INFO L226 Difference]: Without dead ends: 50 [2018-11-09 23:16:48,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-09 23:16:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-09 23:16:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-11-09 23:16:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-09 23:16:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 64 transitions. [2018-11-09 23:16:48,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 64 transitions. Word has length 97 [2018-11-09 23:16:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:48,417 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 64 transitions. [2018-11-09 23:16:48,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-09 23:16:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 64 transitions. [2018-11-09 23:16:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-09 23:16:48,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:48,419 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:48,419 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:48,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash 587556238, now seen corresponding path program 4 times [2018-11-09 23:16:48,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:48,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:48,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:48,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:48,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 113 proven. 82 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-11-09 23:16:48,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:48,513 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:48,528 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-09 23:16:48,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-09 23:16:48,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:48,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 84 proven. 176 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-11-09 23:16:48,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:48,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2018-11-09 23:16:48,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-09 23:16:48,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-09 23:16:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-09 23:16:48,640 INFO L87 Difference]: Start difference. First operand 44 states and 64 transitions. Second operand 14 states. [2018-11-09 23:16:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:49,011 INFO L93 Difference]: Finished difference Result 108 states and 183 transitions. [2018-11-09 23:16:49,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-09 23:16:49,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2018-11-09 23:16:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:49,013 INFO L225 Difference]: With dead ends: 108 [2018-11-09 23:16:49,013 INFO L226 Difference]: Without dead ends: 69 [2018-11-09 23:16:49,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2018-11-09 23:16:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-09 23:16:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-09 23:16:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-09 23:16:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-11-09 23:16:49,022 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 98 [2018-11-09 23:16:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:49,022 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2018-11-09 23:16:49,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-09 23:16:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2018-11-09 23:16:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-09 23:16:49,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:49,025 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:49,026 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:49,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 5 times [2018-11-09 23:16:49,026 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:49,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:49,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:49,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:49,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-09 23:16:49,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:49,158 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:49,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-09 23:16:49,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-09 23:16:49,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:49,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 586 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2018-11-09 23:16:49,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:49,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 17 [2018-11-09 23:16:49,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-09 23:16:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-09 23:16:49,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-11-09 23:16:49,387 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 17 states. [2018-11-09 23:16:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:49,806 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2018-11-09 23:16:49,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-09 23:16:49,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2018-11-09 23:16:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:49,808 INFO L225 Difference]: With dead ends: 153 [2018-11-09 23:16:49,808 INFO L226 Difference]: Without dead ends: 93 [2018-11-09 23:16:49,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=1085, Unknown=0, NotChecked=0, Total=1406 [2018-11-09 23:16:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-09 23:16:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2018-11-09 23:16:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-09 23:16:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2018-11-09 23:16:49,822 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2018-11-09 23:16:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:49,822 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2018-11-09 23:16:49,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-09 23:16:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2018-11-09 23:16:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-11-09 23:16:49,828 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:49,828 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:49,828 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:49,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 39069676, now seen corresponding path program 6 times [2018-11-09 23:16:49,828 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:49,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:49,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:49,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:49,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-11-09 23:16:49,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:49,941 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:49,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-09 23:16:50,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-09 23:16:50,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:50,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 331 proven. 821 refuted. 0 times theorem prover too weak. 3416 trivial. 0 not checked. [2018-11-09 23:16:50,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:50,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2018-11-09 23:16:50,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-09 23:16:50,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-09 23:16:50,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-09 23:16:50,120 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 11 states. [2018-11-09 23:16:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:50,224 INFO L93 Difference]: Finished difference Result 91 states and 125 transitions. [2018-11-09 23:16:50,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-09 23:16:50,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 287 [2018-11-09 23:16:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:50,225 INFO L225 Difference]: With dead ends: 91 [2018-11-09 23:16:50,226 INFO L226 Difference]: Without dead ends: 87 [2018-11-09 23:16:50,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-09 23:16:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-09 23:16:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-09 23:16:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-09 23:16:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2018-11-09 23:16:50,235 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 287 [2018-11-09 23:16:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:50,236 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2018-11-09 23:16:50,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-09 23:16:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2018-11-09 23:16:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-11-09 23:16:50,248 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:50,248 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 69, 42, 42, 42, 42, 42, 42, 42, 27, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:50,248 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:50,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash -75689396, now seen corresponding path program 7 times [2018-11-09 23:16:50,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:50,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:50,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:50,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:50,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 1960 proven. 2026 refuted. 0 times theorem prover too weak. 16084 trivial. 0 not checked. [2018-11-09 23:16:50,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:50,549 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:50,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:50,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 448 proven. 2987 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2018-11-09 23:16:50,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:50,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2018-11-09 23:16:50,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-09 23:16:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-09 23:16:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-11-09 23:16:50,980 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand 21 states. [2018-11-09 23:16:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:51,635 INFO L93 Difference]: Finished difference Result 210 states and 375 transitions. [2018-11-09 23:16:51,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-09 23:16:51,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 587 [2018-11-09 23:16:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:51,637 INFO L225 Difference]: With dead ends: 210 [2018-11-09 23:16:51,637 INFO L226 Difference]: Without dead ends: 130 [2018-11-09 23:16:51,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=639, Invalid=2331, Unknown=0, NotChecked=0, Total=2970 [2018-11-09 23:16:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-09 23:16:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-11-09 23:16:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-11-09 23:16:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2018-11-09 23:16:51,651 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 587 [2018-11-09 23:16:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:51,651 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2018-11-09 23:16:51,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-09 23:16:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2018-11-09 23:16:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2018-11-09 23:16:51,663 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:51,664 INFO L375 BasicCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:51,664 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:51,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1739658035, now seen corresponding path program 8 times [2018-11-09 23:16:51,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:51,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:51,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:51,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:16:51,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 4524 proven. 1468 refuted. 0 times theorem prover too weak. 33496 trivial. 0 not checked. [2018-11-09 23:16:52,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:52,066 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:52,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-09 23:16:52,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-09 23:16:52,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:52,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 3465 proven. 5944 refuted. 0 times theorem prover too weak. 30079 trivial. 0 not checked. [2018-11-09 23:16:52,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:52,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2018-11-09 23:16:52,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-09 23:16:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-09 23:16:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2018-11-09 23:16:52,596 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand 25 states. [2018-11-09 23:16:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:53,456 INFO L93 Difference]: Finished difference Result 269 states and 488 transitions. [2018-11-09 23:16:53,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-09 23:16:53,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 818 [2018-11-09 23:16:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:53,462 INFO L225 Difference]: With dead ends: 269 [2018-11-09 23:16:53,462 INFO L226 Difference]: Without dead ends: 159 [2018-11-09 23:16:53,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2826, Unknown=0, NotChecked=0, Total=3540 [2018-11-09 23:16:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-09 23:16:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2018-11-09 23:16:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-09 23:16:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 187 transitions. [2018-11-09 23:16:53,482 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 187 transitions. Word has length 818 [2018-11-09 23:16:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:53,484 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 187 transitions. [2018-11-09 23:16:53,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-09 23:16:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 187 transitions. [2018-11-09 23:16:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-11-09 23:16:53,491 INFO L367 BasicCegarLoop]: Found error trace [2018-11-09 23:16:53,491 INFO L375 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:16:53,491 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-09 23:16:53,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:16:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 9 times [2018-11-09 23:16:53,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:16:53,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:16:53,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:53,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:16:53,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:16:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:16:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-09 23:16:54,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:16:54,227 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:16:54,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-09 23:16:54,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-11-09 23:16:54,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:16:54,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:16:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-09 23:16:55,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:16:55,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-09 23:16:55,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-09 23:16:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-09 23:16:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-11-09 23:16:55,186 INFO L87 Difference]: Start difference. First operand 130 states and 187 transitions. Second operand 36 states. [2018-11-09 23:16:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:16:55,362 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2018-11-09 23:16:55,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-09 23:16:55,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-11-09 23:16:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-09 23:16:55,364 INFO L225 Difference]: With dead ends: 131 [2018-11-09 23:16:55,364 INFO L226 Difference]: Without dead ends: 0 [2018-11-09 23:16:55,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2018-11-09 23:16:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-09 23:16:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-09 23:16:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-09 23:16:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-09 23:16:55,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-11-09 23:16:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-09 23:16:55,366 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-09 23:16:55,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-09 23:16:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-09 23:16:55,366 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-09 23:16:55,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-09 23:16:55,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,399 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,417 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:55,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-09 23:16:56,017 WARN L179 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2018-11-09 23:16:56,019 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-09 23:16:56,019 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-09 23:16:56,019 INFO L421 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (< 1 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-09 23:16:56,019 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and (<= 21 |fibonacci_#t~ret0|) .cse0) (and (<= |fibonacci_#in~n| 3) .cse0) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) (<= 7 fibonacci_~n)) (and .cse0 (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5)) (and (<= 13 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 8)) (and .cse0 (<= fibonacci_~n 4) (<= 2 |fibonacci_#t~ret0|)) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= 6 fibonacci_~n)))) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-09 23:16:56,020 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L428 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-09 23:16:56,020 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-09 23:16:56,020 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-09 23:16:56,021 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-09 23:16:56,021 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-09 23:16:56,021 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-09 23:16:56,021 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-09 23:16:56,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 11:16:56 BoogieIcfgContainer [2018-11-09 23:16:56,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-09 23:16:56,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-09 23:16:56,024 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-09 23:16:56,024 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-09 23:16:56,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:16:46" (3/4) ... [2018-11-09 23:16:56,031 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-09 23:16:56,039 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-09 23:16:56,039 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-09 23:16:56,039 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-09 23:16:56,044 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-09 23:16:56,044 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-09 23:16:56,044 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-09 23:16:56,081 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_09e854d6-dcda-40da-98d8-d10d1f4f95d9/bin-2019/uautomizer/witness.graphml [2018-11-09 23:16:56,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-09 23:16:56,082 INFO L168 Benchmark]: Toolchain (without parser) took 9858.48 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 763.9 MB). Free memory was 960.3 MB in the beginning and 1.2 GB in the end (delta: -210.3 MB). Peak memory consumption was 553.6 MB. Max. memory is 11.5 GB. [2018-11-09 23:16:56,083 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:16:56,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.29 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-09 23:16:56,083 INFO L168 Benchmark]: Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:16:56,084 INFO L168 Benchmark]: RCFGBuilder took 217.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-09 23:16:56,084 INFO L168 Benchmark]: TraceAbstraction took 9390.70 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 623.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -39.6 MB). Peak memory consumption was 583.8 MB. Max. memory is 11.5 GB. [2018-11-09 23:16:56,084 INFO L168 Benchmark]: Witness Printer took 57.15 ms. Allocated memory is still 1.8 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:16:56,089 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.29 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9390.70 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 623.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -39.6 MB). Peak memory consumption was 583.8 MB. Max. memory is 11.5 GB. * Witness Printer took 57.15 ms. Allocated memory is still 1.8 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 9.3s OverallTime, 12 OverallIterations, 119 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 317 SDtfs, 861 SDslu, 1407 SDs, 0 SdLazy, 2283 SolverSat, 1062 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 3139 SyntacticMatches, 2 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 62 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 239 PreInvPairs, 330 NumberOfFragments, 93 HoareAnnotationTreeSize, 239 FomulaSimplifications, 1380 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3241 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 5933 NumberOfCodeBlocks, 5698 NumberOfCodeBlocksAsserted, 164 NumberOfCheckSat, 5911 ConstructedInterpolants, 0 QuantifiedInterpolants, 5422699 SizeOfPredicates, 62 NumberOfNonLiveVariables, 6048 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 176572/201478 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...