./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.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_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4907b122df98ddbbf9083d03257189b61cf26f41 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4907b122df98ddbbf9083d03257189b61cf26f41 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 13:28:55,085 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 13:28:55,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 13:28:55,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 13:28:55,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 13:28:55,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 13:28:55,096 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 13:28:55,097 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 13:28:55,098 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 13:28:55,098 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 13:28:55,099 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 13:28:55,099 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 13:28:55,099 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 13:28:55,100 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 13:28:55,101 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 13:28:55,101 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 13:28:55,102 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 13:28:55,103 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 13:28:55,104 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 13:28:55,105 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 13:28:55,106 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 13:28:55,106 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 13:28:55,108 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 13:28:55,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 13:28:55,108 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 13:28:55,109 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 13:28:55,109 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 13:28:55,110 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 13:28:55,110 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 13:28:55,111 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 13:28:55,111 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 13:28:55,111 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 13:28:55,112 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 13:28:55,112 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 13:28:55,112 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 13:28:55,113 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 13:28:55,113 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 13:28:55,122 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 13:28:55,122 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 13:28:55,123 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 13:28:55,123 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 13:28:55,123 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 13:28:55,123 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 13:28:55,123 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 13:28:55,124 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 13:28:55,124 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 13:28:55,124 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 13:28:55,124 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 13:28:55,124 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 13:28:55,125 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 13:28:55,126 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 13:28:55,126 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 13:28:55,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 13:28:55,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 13:28:55,128 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 13:28:55,128 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan 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 -> Taipan 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 -> 4907b122df98ddbbf9083d03257189b61cf26f41 [2018-11-10 13:28:55,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 13:28:55,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 13:28:55,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 13:28:55,160 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 13:28:55,160 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 13:28:55,161 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:28:55,195 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/1e2297499/4403183f83c54a8b9a2fcc625642fe95/FLAG671c905f6 [2018-11-10 13:28:55,578 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 13:28:55,579 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:28:55,582 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/1e2297499/4403183f83c54a8b9a2fcc625642fe95/FLAG671c905f6 [2018-11-10 13:28:55,590 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/1e2297499/4403183f83c54a8b9a2fcc625642fe95 [2018-11-10 13:28:55,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 13:28:55,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 13:28:55,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 13:28:55,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 13:28:55,597 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 13:28:55,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d89bcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55, skipping insertion in model container [2018-11-10 13:28:55,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 13:28:55,613 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 13:28:55,698 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:28:55,701 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 13:28:55,709 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:28:55,717 INFO L193 MainTranslator]: Completed translation [2018-11-10 13:28:55,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55 WrapperNode [2018-11-10 13:28:55,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 13:28:55,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 13:28:55,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 13:28:55,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 13:28:55,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 13:28:55,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 13:28:55,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 13:28:55,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 13:28:55,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... [2018-11-10 13:28:55,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 13:28:55,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 13:28:55,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 13:28:55,741 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 13:28:55,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 13:28:55,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 13:28:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 13:28:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 13:28:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 13:28:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 13:28:55,911 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 13:28:55,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:28:55 BoogieIcfgContainer [2018-11-10 13:28:55,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 13:28:55,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 13:28:55,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 13:28:55,914 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 13:28:55,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 01:28:55" (1/3) ... [2018-11-10 13:28:55,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a334828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:28:55, skipping insertion in model container [2018-11-10 13:28:55,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:55" (2/3) ... [2018-11-10 13:28:55,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a334828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:28:55, skipping insertion in model container [2018-11-10 13:28:55,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:28:55" (3/3) ... [2018-11-10 13:28:55,917 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:28:55,923 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 13:28:55,929 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 13:28:55,938 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 13:28:55,958 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 13:28:55,958 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 13:28:55,958 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 13:28:55,958 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 13:28:55,959 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 13:28:55,959 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 13:28:55,959 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 13:28:55,959 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 13:28:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-10 13:28:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-10 13:28:55,973 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:55,974 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:55,976 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:55,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:55,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-11-10 13:28:55,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,010 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 13:28:56,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 13:28:56,074 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 13:28:56,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 13:28:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 13:28:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:28:56,085 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-11-10 13:28:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:56,121 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-10 13:28:56,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 13:28:56,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-10 13:28:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:56,129 INFO L225 Difference]: With dead ends: 22 [2018-11-10 13:28:56,129 INFO L226 Difference]: Without dead ends: 11 [2018-11-10 13:28:56,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:28:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-10 13:28:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-10 13:28:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-10 13:28:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-11-10 13:28:56,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-11-10 13:28:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:56,157 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-11-10 13:28:56,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 13:28:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-11-10 13:28:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 13:28:56,158 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:56,158 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:56,158 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:56,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-11-10 13:28:56,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,159 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,187 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:56,188 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-11-10 13:28:56,190 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [15], [19], [20], [21] [2018-11-10 13:28:56,217 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 13:28:56,218 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 13:28:56,374 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 13:28:56,375 INFO L272 AbstractInterpreter]: Visited 10 different actions 24 times. Merged at 1 different actions 7 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-11-10 13:28:56,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 13:28:56,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,384 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:56,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,393 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 13:28:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,430 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:56,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-11-10 13:28:56,467 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:56,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 13:28:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 13:28:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 13:28:56,468 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-11-10 13:28:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:56,482 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-11-10 13:28:56,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 13:28:56,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-10 13:28:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:56,483 INFO L225 Difference]: With dead ends: 15 [2018-11-10 13:28:56,483 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 13:28:56,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 13:28:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 13:28:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 13:28:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 13:28:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 13:28:56,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 13:28:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:56,485 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 13:28:56,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 13:28:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 13:28:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 13:28:56,486 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:56,486 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:56,486 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:56,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2018-11-10 13:28:56,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,487 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:56,515 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:56,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:56,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,516 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:56,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 13:28:56,521 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 13:28:56,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 13:28:56,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:56,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:56,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-10 13:28:56,604 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:56,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 13:28:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 13:28:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 13:28:56,605 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-10 13:28:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:56,618 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-10 13:28:56,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 13:28:56,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-10 13:28:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:56,620 INFO L225 Difference]: With dead ends: 16 [2018-11-10 13:28:56,620 INFO L226 Difference]: Without dead ends: 13 [2018-11-10 13:28:56,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 13:28:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-10 13:28:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-10 13:28:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-10 13:28:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-10 13:28:56,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-11-10 13:28:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:56,623 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-10 13:28:56,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 13:28:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-10 13:28:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-10 13:28:56,623 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:56,624 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:56,624 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:56,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2018-11-10 13:28:56,624 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:56,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,625 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,691 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:56,691 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:56,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:56,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,691 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:56,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 13:28:56,704 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 13:28:56,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 13:28:56,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:56,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:56,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2018-11-10 13:28:56,815 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:56,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 13:28:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 13:28:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 13:28:56,815 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-11-10 13:28:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:56,822 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-11-10 13:28:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 13:28:56,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-11-10 13:28:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:56,823 INFO L225 Difference]: With dead ends: 17 [2018-11-10 13:28:56,823 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 13:28:56,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 13:28:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 13:28:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 13:28:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 13:28:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 13:28:56,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-10 13:28:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:56,826 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 13:28:56,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 13:28:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 13:28:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 13:28:56,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:56,826 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:56,826 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:56,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2018-11-10 13:28:56,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:56,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,871 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:56,871 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:56,871 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:56,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:56,871 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:56,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,888 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 13:28:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:56,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:56,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:56,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-11-10 13:28:56,976 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:56,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 13:28:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 13:28:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:56,977 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-11-10 13:28:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:56,988 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-10 13:28:56,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 13:28:56,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-10 13:28:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:56,989 INFO L225 Difference]: With dead ends: 18 [2018-11-10 13:28:56,989 INFO L226 Difference]: Without dead ends: 15 [2018-11-10 13:28:56,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-10 13:28:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-10 13:28:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-10 13:28:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-10 13:28:56,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-10 13:28:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:56,991 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-10 13:28:56,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 13:28:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-10 13:28:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 13:28:56,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:56,992 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:56,992 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:56,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2018-11-10 13:28:56,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:56,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:56,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:56,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,043 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:57,043 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:57,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:57,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,043 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:57,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 13:28:57,050 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 13:28:57,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 13:28:57,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:57,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:57,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2018-11-10 13:28:57,153 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:57,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 13:28:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 13:28:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,154 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-11-10 13:28:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:57,164 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 13:28:57,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 13:28:57,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-11-10 13:28:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:57,165 INFO L225 Difference]: With dead ends: 19 [2018-11-10 13:28:57,166 INFO L226 Difference]: Without dead ends: 16 [2018-11-10 13:28:57,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-10 13:28:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-10 13:28:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-10 13:28:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-10 13:28:57,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-10 13:28:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:57,169 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-10 13:28:57,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 13:28:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-10 13:28:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 13:28:57,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:57,169 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:57,170 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:57,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -625355333, now seen corresponding path program 6 times [2018-11-10 13:28:57,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:57,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:57,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,171 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,231 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:57,231 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:57,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:57,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,232 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:57,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 13:28:57,237 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 13:28:57,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 13:28:57,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:57,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:57,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2018-11-10 13:28:57,314 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:57,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 13:28:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 13:28:57,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,315 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2018-11-10 13:28:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:57,325 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-10 13:28:57,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 13:28:57,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-11-10 13:28:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:57,326 INFO L225 Difference]: With dead ends: 20 [2018-11-10 13:28:57,326 INFO L226 Difference]: Without dead ends: 17 [2018-11-10 13:28:57,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-10 13:28:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-10 13:28:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-10 13:28:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-10 13:28:57,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-11-10 13:28:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:57,328 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-10 13:28:57,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 13:28:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-10 13:28:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-10 13:28:57,329 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:57,329 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:57,329 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:57,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2088758676, now seen corresponding path program 7 times [2018-11-10 13:28:57,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:57,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:57,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,331 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,377 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:57,377 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:57,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:57,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,377 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:57,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:57,383 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 13:28:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:57,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2018-11-10 13:28:57,484 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:57,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 13:28:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 13:28:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,485 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2018-11-10 13:28:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:57,497 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-10 13:28:57,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 13:28:57,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-11-10 13:28:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:57,498 INFO L225 Difference]: With dead ends: 21 [2018-11-10 13:28:57,498 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 13:28:57,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 13:28:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 13:28:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 13:28:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-10 13:28:57,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-11-10 13:28:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:57,501 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-10 13:28:57,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 13:28:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-10 13:28:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 13:28:57,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:57,502 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:57,502 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:57,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 326947035, now seen corresponding path program 8 times [2018-11-10 13:28:57,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:57,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:28:57,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,503 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,551 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:57,551 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:57,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:57,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,551 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:57,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 13:28:57,558 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 13:28:57,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-10 13:28:57,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:57,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:57,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2018-11-10 13:28:57,636 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:57,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 13:28:57,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 13:28:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,636 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2018-11-10 13:28:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:57,647 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-10 13:28:57,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 13:28:57,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-11-10 13:28:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:57,649 INFO L225 Difference]: With dead ends: 22 [2018-11-10 13:28:57,649 INFO L226 Difference]: Without dead ends: 19 [2018-11-10 13:28:57,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-10 13:28:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-10 13:28:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-10 13:28:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-10 13:28:57,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-11-10 13:28:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:57,652 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-10 13:28:57,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 13:28:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-10 13:28:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-10 13:28:57,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:57,653 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:57,653 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:57,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1545361012, now seen corresponding path program 9 times [2018-11-10 13:28:57,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:57,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:57,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,654 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:28:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 13:28:57,730 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 13:28:57,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 13:28:57,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:28:57,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:28:57,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 13:28:57,738 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 13:28:57,744 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 13:28:57,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:28:57,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:28:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:28:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:28:57,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 13:28:57,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2018-11-10 13:28:57,817 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 13:28:57,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 13:28:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 13:28:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,818 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2018-11-10 13:28:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:28:57,828 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-10 13:28:57,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 13:28:57,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-11-10 13:28:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:28:57,829 INFO L225 Difference]: With dead ends: 23 [2018-11-10 13:28:57,829 INFO L226 Difference]: Without dead ends: 20 [2018-11-10 13:28:57,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:28:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-10 13:28:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-10 13:28:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 13:28:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-10 13:28:57,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-11-10 13:28:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:28:57,832 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-10 13:28:57,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 13:28:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-10 13:28:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 13:28:57,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:28:57,832 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:28:57,833 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:28:57,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:28:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 661488635, now seen corresponding path program 10 times [2018-11-10 13:28:57,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 13:28:57,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 13:28:57,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 13:28:57,834 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 13:28:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 13:28:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 13:28:57,856 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 13:28:57,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 01:28:57 BoogieIcfgContainer [2018-11-10 13:28:57,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 13:28:57,871 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 13:28:57,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 13:28:57,872 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 13:28:57,872 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:28:55" (3/4) ... [2018-11-10 13:28:57,875 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 13:28:57,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 13:28:57,875 INFO L168 Benchmark]: Toolchain (without parser) took 2282.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 954.9 MB in the beginning and 1.1 GB in the end (delta: -141.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:28:57,876 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:28:57,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.14 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 942.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-11-10 13:28:57,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.68 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:28:57,877 INFO L168 Benchmark]: Boogie Preprocessor took 10.56 ms. Allocated memory is still 1.0 GB. Free memory was 942.9 MB in the beginning and 940.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 13:28:57,877 INFO L168 Benchmark]: RCFGBuilder took 170.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-11-10 13:28:57,878 INFO L168 Benchmark]: TraceAbstraction took 1959.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 11.5 GB. [2018-11-10 13:28:57,878 INFO L168 Benchmark]: Witness Printer took 3.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:28:57,879 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.14 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 942.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.68 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.56 ms. Allocated memory is still 1.0 GB. Free memory was 942.9 MB in the beginning and 940.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 170.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -190.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1959.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 27]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 14. Possible FailurePath: [L1] int __return_main; VAL [\old(__return_main)=2, __return_main=0] [L7] float main__tick = 0.10000000149011612; [L8] float main__time = 0.0; [L9] int main__i; [L10] main__i = 0 VAL [__return_main=0, main__i=0, main__tick=2500000037252903/25000000000000000, main__time=0] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L12] COND FALSE !(main__i < 10) [L21] int __tmp_1; [L22] __tmp_1 = main__time != 1.0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L27] __VERIFIER_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. UNSAFE Result, 1.9s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 94 SDtfs, 0 SDslu, 298 SDs, 0 SdLazy, 107 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 209 SyntacticMatches, 30 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 280 NumberOfCodeBlocks, 280 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 359 ConstructedInterpolants, 0 QuantifiedInterpolants, 9395 SizeOfPredicates, 9 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 0/495 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 13:28:59,248 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 13:28:59,250 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 13:28:59,258 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 13:28:59,259 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 13:28:59,259 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 13:28:59,260 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 13:28:59,261 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 13:28:59,262 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 13:28:59,263 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 13:28:59,263 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 13:28:59,264 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 13:28:59,264 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 13:28:59,265 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 13:28:59,266 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 13:28:59,266 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 13:28:59,267 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 13:28:59,268 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 13:28:59,269 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 13:28:59,270 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 13:28:59,271 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 13:28:59,272 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 13:28:59,273 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 13:28:59,274 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 13:28:59,274 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 13:28:59,274 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 13:28:59,275 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 13:28:59,276 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 13:28:59,276 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 13:28:59,277 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 13:28:59,277 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 13:28:59,277 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 13:28:59,278 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 13:28:59,278 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 13:28:59,278 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 13:28:59,279 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 13:28:59,279 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 13:28:59,289 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 13:28:59,289 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 13:28:59,290 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 13:28:59,290 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 13:28:59,290 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 13:28:59,291 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 13:28:59,291 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 13:28:59,291 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 13:28:59,291 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 13:28:59,291 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 13:28:59,292 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 13:28:59,293 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 13:28:59,293 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 13:28:59,294 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 13:28:59,294 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 13:28:59,295 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 13:28:59,295 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_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan 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 -> Taipan 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 -> 4907b122df98ddbbf9083d03257189b61cf26f41 [2018-11-10 13:28:59,329 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 13:28:59,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 13:28:59,340 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 13:28:59,341 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 13:28:59,341 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 13:28:59,342 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:28:59,384 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/7c83d698d/b6663a6ab58e46ed84ea522b616756dc/FLAG2782f8719 [2018-11-10 13:28:59,766 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 13:28:59,766 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:28:59,770 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/7c83d698d/b6663a6ab58e46ed84ea522b616756dc/FLAG2782f8719 [2018-11-10 13:28:59,777 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/data/7c83d698d/b6663a6ab58e46ed84ea522b616756dc [2018-11-10 13:28:59,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 13:28:59,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 13:28:59,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 13:28:59,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 13:28:59,783 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 13:28:59,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583fadd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59, skipping insertion in model container [2018-11-10 13:28:59,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 13:28:59,800 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 13:28:59,907 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:28:59,912 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 13:28:59,925 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 13:28:59,936 INFO L193 MainTranslator]: Completed translation [2018-11-10 13:28:59,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59 WrapperNode [2018-11-10 13:28:59,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 13:28:59,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 13:28:59,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 13:28:59,937 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 13:28:59,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 13:28:59,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 13:28:59,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 13:28:59,954 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 13:28:59,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... [2018-11-10 13:28:59,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 13:28:59,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 13:28:59,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 13:28:59,968 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 13:28:59,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:29:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 13:29:00,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 13:29:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 13:29:00,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 13:29:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 13:29:00,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 13:29:00,311 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 13:29:00,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:00 BoogieIcfgContainer [2018-11-10 13:29:00,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 13:29:00,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 13:29:00,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 13:29:00,315 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 13:29:00,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 01:28:59" (1/3) ... [2018-11-10 13:29:00,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e2e804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:00, skipping insertion in model container [2018-11-10 13:29:00,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 01:28:59" (2/3) ... [2018-11-10 13:29:00,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e2e804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 01:29:00, skipping insertion in model container [2018-11-10 13:29:00,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 01:29:00" (3/3) ... [2018-11-10 13:29:00,317 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-11-10 13:29:00,323 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 13:29:00,327 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 13:29:00,335 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 13:29:00,351 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 13:29:00,352 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 13:29:00,352 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 13:29:00,352 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 13:29:00,352 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 13:29:00,352 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 13:29:00,352 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 13:29:00,352 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 13:29:00,352 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 13:29:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-10 13:29:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-10 13:29:00,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:00,365 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:00,366 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:00,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:00,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-11-10 13:29:00,372 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:00,372 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-10 13:29:00,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:00,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,431 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 13:29:00,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 13:29:00,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 13:29:00,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 13:29:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 13:29:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:29:00,456 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-11-10 13:29:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:00,533 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-10 13:29:00,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 13:29:00,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-10 13:29:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:00,542 INFO L225 Difference]: With dead ends: 22 [2018-11-10 13:29:00,542 INFO L226 Difference]: Without dead ends: 11 [2018-11-10 13:29:00,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 13:29:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-10 13:29:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-10 13:29:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-10 13:29:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-11-10 13:29:00,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-11-10 13:29:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:00,567 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-11-10 13:29:00,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 13:29:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-11-10 13:29:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 13:29:00,568 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:00,568 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:00,568 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:00,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-11-10 13:29:00,569 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:00,569 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-10 13:29:00,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:00,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:29:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:29:00,667 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:29:00,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 13:29:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 13:29:00,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:29:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 13:29:00,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2018-11-10 13:29:00,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 13:29:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 13:29:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-10 13:29:00,727 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-11-10 13:29:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:00,840 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-11-10 13:29:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 13:29:00,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-11-10 13:29:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:00,844 INFO L225 Difference]: With dead ends: 17 [2018-11-10 13:29:00,844 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 13:29:00,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-10 13:29:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 13:29:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 13:29:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 13:29:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 13:29:00,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-11-10 13:29:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:00,847 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 13:29:00,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 13:29:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 13:29:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 13:29:00,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:00,848 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:00,848 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:00,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 2 times [2018-11-10 13:29:00,849 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:00,849 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-10 13:29:00,860 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 13:29:00,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 13:29:00,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:29:00,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:00,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:29:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:01,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:29:01,116 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:29:01,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 13:29:01,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 13:29:01,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:29:01,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:01,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:29:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:01,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 13:29:01,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2018-11-10 13:29:01,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 13:29:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 13:29:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-11-10 13:29:01,229 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-11-10 13:29:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 13:29:01,704 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2018-11-10 13:29:01,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 13:29:01,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-11-10 13:29:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 13:29:01,708 INFO L225 Difference]: With dead ends: 23 [2018-11-10 13:29:01,708 INFO L226 Difference]: Without dead ends: 20 [2018-11-10 13:29:01,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-11-10 13:29:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-10 13:29:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-10 13:29:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 13:29:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-10 13:29:01,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-11-10 13:29:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 13:29:01,713 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-10 13:29:01,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 13:29:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-10 13:29:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 13:29:01,714 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 13:29:01,714 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 13:29:01,714 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 13:29:01,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 13:29:01,714 INFO L82 PathProgramCache]: Analyzing trace with hash 661488635, now seen corresponding path program 3 times [2018-11-10 13:29:01,714 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 13:29:01,715 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-10 13:29:01,717 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 13:29:01,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 13:29:01,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:29:01,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:29:02,701 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-10 13:29:04,649 WARN L179 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 13:29:05,461 WARN L179 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-10 13:29:14,385 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2018-11-10 13:29:17,797 WARN L179 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-10 13:29:39,533 WARN L179 SmtUtils]: Spent 4.74 s on a formula simplification that was a NOOP. DAG size: 19 [2018-11-10 13:29:46,932 WARN L179 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 20 [2018-11-10 13:29:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 50 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:29:51,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:29:59,930 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 13:30:06,858 WARN L179 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-10 13:30:31,395 WARN L179 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 10 [2018-11-10 13:30:33,972 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:37,611 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:40,582 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:42,612 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-11-10 13:30:44,641 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:46,678 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-11-10 13:30:48,710 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:50,753 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-11-10 13:30:52,790 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:56,348 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-11-10 13:30:58,395 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-11-10 13:31:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 52 not checked. [2018-11-10 13:31:00,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 13:31:00,420 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c8ae0614-9208-4731-a728-ea71d144fbd8/bin-2019/utaipan/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 [2018-11-10 13:31:00,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 13:31:04,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 13:31:04,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 13:31:04,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 13:31:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 50 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 13:31:04,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 13:31:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 52 not checked. [2018-11-10 13:31:04,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 13:31:04,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 26 [2018-11-10 13:31:04,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 13:31:04,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 13:31:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=237, Unknown=20, NotChecked=312, Total=650 [2018-11-10 13:31:04,570 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 26 states. [2018-11-10 13:31:06,631 WARN L854 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0))))) is different from true [2018-11-10 13:31:08,678 WARN L854 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (= c_main_~main__time~0 (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0))) is different from true [2018-11-10 13:31:10,715 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-11-10 13:31:12,756 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-11-10 13:31:14,792 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-11-10 13:31:18,905 WARN L854 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__time~0) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-11-10 13:31:20,956 WARN L854 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (= c_main_~main__time~0 (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0))) is different from true [2018-11-10 13:31:35,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 13:31:35,488 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:845) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:382) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:673) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:602) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 43 more [2018-11-10 13:31:35,490 INFO L168 Benchmark]: Toolchain (without parser) took 155710.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 953.2 MB in the beginning and 916.9 MB in the end (delta: 36.4 MB). Peak memory consumption was 161.2 MB. Max. memory is 11.5 GB. [2018-11-10 13:31:35,491 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:31:35,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.04 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 13:31:35,492 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 13:31:35,492 INFO L168 Benchmark]: Boogie Preprocessor took 13.18 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 13:31:35,493 INFO L168 Benchmark]: RCFGBuilder took 344.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2018-11-10 13:31:35,494 INFO L168 Benchmark]: TraceAbstraction took 155177.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 916.9 MB in the end (delta: 192.7 MB). Peak memory consumption was 192.7 MB. Max. memory is 11.5 GB. [2018-11-10 13:31:35,496 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 156.04 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.18 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 344.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 155177.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 916.9 MB in the end (delta: 192.7 MB). Peak memory consumption was 192.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...