./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad4e6ad99a266ddeead98987e8e44db723af5bc7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:14:04,697 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:14:04,698 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:14:04,704 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:14:04,704 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:14:04,705 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:14:04,705 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:14:04,706 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:14:04,707 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:14:04,708 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:14:04,708 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:14:04,708 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:14:04,709 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:14:04,709 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:14:04,710 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:14:04,710 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:14:04,710 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:14:04,711 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:14:04,712 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:14:04,713 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:14:04,714 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:14:04,714 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:14:04,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:14:04,716 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:14:04,716 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:14:04,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:14:04,717 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:14:04,717 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:14:04,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:14:04,718 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:14:04,718 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:14:04,719 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:14:04,719 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:14:04,719 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:14:04,720 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:14:04,720 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:14:04,720 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 16:14:04,728 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:14:04,728 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:14:04,729 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:14:04,729 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:14:04,729 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 16:14:04,729 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 16:14:04,729 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 16:14:04,729 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 16:14:04,730 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 16:14:04,731 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:14:04,731 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 16:14:04,731 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 16:14:04,732 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:14:04,732 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:14:04,732 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_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad4e6ad99a266ddeead98987e8e44db723af5bc7 [2018-12-08 16:14:04,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:14:04,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:14:04,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:14:04,759 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:14:04,759 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:14:04,759 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i15_o15_false-unreach-call_true-termination.c [2018-12-08 16:14:04,793 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/data/e6479b347/26e522b69259457bac774c6812ba1293/FLAGabb8dfb09 [2018-12-08 16:14:05,194 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:14:05,195 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/sv-benchmarks/c/recursive-simple/id_i15_o15_false-unreach-call_true-termination.c [2018-12-08 16:14:05,198 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/data/e6479b347/26e522b69259457bac774c6812ba1293/FLAGabb8dfb09 [2018-12-08 16:14:05,206 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/data/e6479b347/26e522b69259457bac774c6812ba1293 [2018-12-08 16:14:05,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:14:05,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:14:05,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:14:05,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:14:05,211 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:14:05,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7084b22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05, skipping insertion in model container [2018-12-08 16:14:05,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:14:05,225 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:14:05,304 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:14:05,306 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:14:05,314 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:14:05,322 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:14:05,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05 WrapperNode [2018-12-08 16:14:05,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:14:05,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:14:05,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:14:05,323 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:14:05,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:14:05,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:14:05,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:14:05,334 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:14:05,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... [2018-12-08 16:14:05,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:14:05,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:14:05,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:14:05,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:14:05,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:14:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-08 16:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-08 16:14:05,479 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:14:05,479 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 16:14:05,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:14:05 BoogieIcfgContainer [2018-12-08 16:14:05,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:14:05,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:14:05,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:14:05,482 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:14:05,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:14:05" (1/3) ... [2018-12-08 16:14:05,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54729e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:14:05, skipping insertion in model container [2018-12-08 16:14:05,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:14:05" (2/3) ... [2018-12-08 16:14:05,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54729e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:14:05, skipping insertion in model container [2018-12-08 16:14:05,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:14:05" (3/3) ... [2018-12-08 16:14:05,484 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15_false-unreach-call_true-termination.c [2018-12-08 16:14:05,489 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:14:05,493 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 16:14:05,503 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 16:14:05,520 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 16:14:05,521 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:14:05,521 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 16:14:05,521 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:14:05,521 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:14:05,521 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:14:05,521 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:14:05,521 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:14:05,521 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:14:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 16:14:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:14:05,535 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:05,535 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:05,537 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:05,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-08 16:14:05,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:05,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:14:05,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:14:05,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:14:05,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:14:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:14:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:14:05,654 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-08 16:14:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:05,699 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-08 16:14:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:14:05,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 16:14:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:05,706 INFO L225 Difference]: With dead ends: 30 [2018-12-08 16:14:05,706 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 16:14:05,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 16:14:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 16:14:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-08 16:14:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 16:14:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 16:14:05,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 16:14:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:05,733 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 16:14:05,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:14:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 16:14:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:14:05,734 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:05,734 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:05,735 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:05,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-08 16:14:05,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:05,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:05,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:05,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 16:14:05,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:05,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:05,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:05,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 16:14:05,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:05,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 16:14:05,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 16:14:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 16:14:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 16:14:05,829 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-08 16:14:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:05,859 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-08 16:14:05,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 16:14:05,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-08 16:14:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:05,860 INFO L225 Difference]: With dead ends: 25 [2018-12-08 16:14:05,860 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 16:14:05,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 16:14:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 16:14:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 16:14:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 16:14:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-08 16:14:05,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-08 16:14:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:05,864 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-08 16:14:05,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 16:14:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-08 16:14:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 16:14:05,864 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:05,864 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:05,864 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:05,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:05,865 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-08 16:14:05,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:05,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:05,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:05,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 16:14:05,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:05,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:05,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 16:14:05,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 16:14:05,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:05,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 16:14:05,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:05,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-08 16:14:05,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 16:14:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 16:14:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-08 16:14:05,944 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-08 16:14:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:05,978 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-08 16:14:05,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:14:05,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-08 16:14:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:05,979 INFO L225 Difference]: With dead ends: 28 [2018-12-08 16:14:05,980 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 16:14:05,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-08 16:14:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 16:14:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 16:14:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 16:14:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 16:14:05,983 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-08 16:14:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:05,983 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 16:14:05,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 16:14:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 16:14:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-08 16:14:05,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:05,984 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:05,984 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:05,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-08 16:14:05,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:05,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:05,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:05,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 16:14:06,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:06,047 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:06,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:14:06,064 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 16:14:06,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:06,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 16:14:06,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:06,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-08 16:14:06,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 16:14:06,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 16:14:06,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 16:14:06,086 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-12-08 16:14:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:06,101 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-08 16:14:06,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 16:14:06,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-12-08 16:14:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:06,102 INFO L225 Difference]: With dead ends: 31 [2018-12-08 16:14:06,102 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 16:14:06,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 16:14:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 16:14:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 16:14:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 16:14:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-08 16:14:06,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-08 16:14:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:06,105 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-08 16:14:06,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 16:14:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-08 16:14:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 16:14:06,106 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:06,106 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:06,106 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:06,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-08 16:14:06,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:06,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:06,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:06,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 16:14:06,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:06,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:06,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:14:06,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:14:06,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:06,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 16:14:06,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:06,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-08 16:14:06,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:14:06,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:14:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-08 16:14:06,205 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-08 16:14:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:06,250 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-08 16:14:06,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 16:14:06,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-08 16:14:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:06,251 INFO L225 Difference]: With dead ends: 34 [2018-12-08 16:14:06,251 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 16:14:06,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-08 16:14:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 16:14:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-08 16:14:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 16:14:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-08 16:14:06,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-08 16:14:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:06,255 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-08 16:14:06,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:14:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-08 16:14:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-08 16:14:06,255 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:06,255 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:06,256 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:06,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-08 16:14:06,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:06,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:06,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:06,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 16:14:06,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:06,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:06,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 16:14:06,367 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-08 16:14:06,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:06,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 16:14:06,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:06,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-08 16:14:06,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:14:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:14:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:14:06,394 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-12-08 16:14:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:06,429 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-08 16:14:06,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 16:14:06,429 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-12-08 16:14:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:06,430 INFO L225 Difference]: With dead ends: 37 [2018-12-08 16:14:06,430 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 16:14:06,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:14:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 16:14:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 16:14:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 16:14:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-08 16:14:06,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-08 16:14:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:06,436 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-08 16:14:06,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:14:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-08 16:14:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 16:14:06,437 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:06,437 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:06,437 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:06,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-08 16:14:06,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:06,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:06,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:06,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 16:14:06,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:06,555 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:06,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 16:14:06,575 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-08 16:14:06,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:06,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 16:14:06,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:06,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-12-08 16:14:06,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-08 16:14:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-08 16:14:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-12-08 16:14:06,690 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-12-08 16:14:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:06,884 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-08 16:14:06,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 16:14:06,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-12-08 16:14:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:06,886 INFO L225 Difference]: With dead ends: 40 [2018-12-08 16:14:06,886 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 16:14:06,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 16:14:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 16:14:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-08 16:14:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 16:14:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-08 16:14:06,890 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-08 16:14:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:06,890 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-08 16:14:06,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-08 16:14:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-08 16:14:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-08 16:14:06,891 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:06,891 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:06,891 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:06,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-12-08 16:14:06,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:06,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:06,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:06,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 16:14:07,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:07,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:07,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:07,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 16:14:07,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:07,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-12-08 16:14:07,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-08 16:14:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-08 16:14:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-12-08 16:14:07,148 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-12-08 16:14:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:07,358 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-08 16:14:07,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 16:14:07,358 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-12-08 16:14:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:07,359 INFO L225 Difference]: With dead ends: 43 [2018-12-08 16:14:07,359 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 16:14:07,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 16:14:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 16:14:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-08 16:14:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 16:14:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-08 16:14:07,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-08 16:14:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:07,365 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-08 16:14:07,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-08 16:14:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-08 16:14:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-08 16:14:07,366 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:07,366 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:07,366 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:07,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:07,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-12-08 16:14:07,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:07,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:07,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:07,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:07,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 16:14:07,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:07,448 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:07,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 16:14:07,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 16:14:07,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:07,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 16:14:07,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:07,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-08 16:14:07,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 16:14:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 16:14:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:14:07,493 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-08 16:14:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:07,574 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-08 16:14:07,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 16:14:07,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-08 16:14:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:07,575 INFO L225 Difference]: With dead ends: 46 [2018-12-08 16:14:07,575 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 16:14:07,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-08 16:14:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 16:14:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-08 16:14:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 16:14:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-08 16:14:07,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-08 16:14:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:07,579 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-08 16:14:07,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 16:14:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-08 16:14:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 16:14:07,579 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:07,580 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:07,580 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:07,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-12-08 16:14:07,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:07,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:07,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:07,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:07,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 16:14:07,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:07,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:07,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:14:07,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-08 16:14:07,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:07,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 16:14:07,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:07,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-12-08 16:14:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-08 16:14:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-08 16:14:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 16:14:07,881 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-12-08 16:14:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:08,171 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-08 16:14:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-08 16:14:08,172 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-12-08 16:14:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:08,172 INFO L225 Difference]: With dead ends: 49 [2018-12-08 16:14:08,172 INFO L226 Difference]: Without dead ends: 45 [2018-12-08 16:14:08,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-12-08 16:14:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-08 16:14:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-08 16:14:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 16:14:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-08 16:14:08,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-08 16:14:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:08,176 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-08 16:14:08,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-08 16:14:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-08 16:14:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-08 16:14:08,177 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:08,177 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:08,177 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:08,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-12-08 16:14:08,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:08,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:08,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:08,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-08 16:14:08,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:08,257 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:08,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:14:08,276 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:14:08,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:08,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-08 16:14:08,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:08,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-08 16:14:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:14:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:14:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:14:08,309 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-12-08 16:14:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:08,416 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-08 16:14:08,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 16:14:08,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-12-08 16:14:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:08,417 INFO L225 Difference]: With dead ends: 52 [2018-12-08 16:14:08,417 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 16:14:08,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-08 16:14:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 16:14:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-08 16:14:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-08 16:14:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-08 16:14:08,420 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-12-08 16:14:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:08,421 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-08 16:14:08,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:14:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-08 16:14:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-08 16:14:08,421 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:08,421 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:08,421 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:08,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:08,422 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-12-08 16:14:08,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:08,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:08,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:08,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-08 16:14:08,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:08,518 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:08,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 16:14:08,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-08 16:14:08,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:08,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-08 16:14:08,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:08,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-08 16:14:08,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 16:14:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 16:14:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-08 16:14:08,582 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-12-08 16:14:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:08,706 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-12-08 16:14:08,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 16:14:08,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-12-08 16:14:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:08,707 INFO L225 Difference]: With dead ends: 55 [2018-12-08 16:14:08,707 INFO L226 Difference]: Without dead ends: 51 [2018-12-08 16:14:08,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-08 16:14:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-08 16:14:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-08 16:14:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-08 16:14:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-12-08 16:14:08,710 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-12-08 16:14:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:08,710 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-12-08 16:14:08,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 16:14:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-12-08 16:14:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-08 16:14:08,711 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:08,711 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:08,711 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:08,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-12-08 16:14:08,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:08,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:08,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:08,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-08 16:14:08,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:08,903 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:08,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 16:14:08,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-08 16:14:08,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:08,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-08 16:14:08,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:08,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-08 16:14:08,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-08 16:14:08,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-08 16:14:08,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-12-08 16:14:08,963 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-12-08 16:14:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:09,004 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-12-08 16:14:09,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 16:14:09,004 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-12-08 16:14:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:09,005 INFO L225 Difference]: With dead ends: 58 [2018-12-08 16:14:09,005 INFO L226 Difference]: Without dead ends: 54 [2018-12-08 16:14:09,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-12-08 16:14:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-08 16:14:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-08 16:14:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-08 16:14:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-12-08 16:14:09,008 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-12-08 16:14:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:09,008 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-12-08 16:14:09,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-08 16:14:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-12-08 16:14:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-08 16:14:09,009 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:09,009 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:09,009 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:09,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-12-08 16:14:09,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:09,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:09,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-08 16:14:09,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:09,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:09,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:09,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-08 16:14:09,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:09,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-12-08 16:14:09,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-08 16:14:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-08 16:14:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-12-08 16:14:09,482 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-12-08 16:14:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:09,930 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-12-08 16:14:09,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 16:14:09,931 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-12-08 16:14:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:09,931 INFO L225 Difference]: With dead ends: 61 [2018-12-08 16:14:09,931 INFO L226 Difference]: Without dead ends: 57 [2018-12-08 16:14:09,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-12-08 16:14:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-08 16:14:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-08 16:14:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-08 16:14:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-12-08 16:14:09,937 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-12-08 16:14:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:09,937 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-12-08 16:14:09,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-08 16:14:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-12-08 16:14:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-08 16:14:09,938 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:09,938 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:09,938 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:09,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-12-08 16:14:09,939 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:09,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:09,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:09,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:14:09,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:14:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-08 16:14:10,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:14:10,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:14:10,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 16:14:10,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 16:14:10,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:14:10,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:14:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-08 16:14:10,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:14:10,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-12-08 16:14:10,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-08 16:14:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-08 16:14:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-12-08 16:14:10,417 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-12-08 16:14:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:14:10,888 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-12-08 16:14:10,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-08 16:14:10,888 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-12-08 16:14:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:14:10,888 INFO L225 Difference]: With dead ends: 64 [2018-12-08 16:14:10,889 INFO L226 Difference]: Without dead ends: 60 [2018-12-08 16:14:10,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-12-08 16:14:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-08 16:14:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-08 16:14:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-08 16:14:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-12-08 16:14:10,893 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-12-08 16:14:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:14:10,893 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-12-08 16:14:10,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-08 16:14:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-12-08 16:14:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-08 16:14:10,893 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:14:10,894 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:14:10,894 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:14:10,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:14:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-12-08 16:14:10,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 16:14:10,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 16:14:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:10,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:14:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:14:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 16:14:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 16:14:10,924 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 16:14:10,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:14:10 BoogieIcfgContainer [2018-12-08 16:14:10,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:14:10,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:14:10,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:14:10,948 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:14:10,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:14:05" (3/4) ... [2018-12-08 16:14:10,950 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 16:14:10,980 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9692d51b-053d-47fa-a509-ae256365fe83/bin-2019/uautomizer/witness.graphml [2018-12-08 16:14:10,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:14:10,981 INFO L168 Benchmark]: Toolchain (without parser) took 5772.79 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 257.9 MB). Free memory was 959.7 MB in the beginning and 829.3 MB in the end (delta: 130.5 MB). Peak memory consumption was 388.4 MB. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 113.46 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 949.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 949.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: Boogie Preprocessor took 10.03 ms. Allocated memory is still 1.0 GB. Free memory is still 949.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: RCFGBuilder took 134.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 949.0 MB in the beginning and 1.1 GB in the end (delta: -120.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:14:10,982 INFO L168 Benchmark]: TraceAbstraction took 5468.08 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.9 MB). Free memory was 1.1 GB in the beginning and 837.2 MB in the end (delta: 232.6 MB). Peak memory consumption was 403.5 MB. Max. memory is 11.5 GB. [2018-12-08 16:14:10,983 INFO L168 Benchmark]: Witness Printer took 32.24 ms. Allocated memory is still 1.3 GB. Free memory was 837.2 MB in the beginning and 829.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2018-12-08 16:14:10,984 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 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 113.46 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 949.0 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 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 949.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.03 ms. Allocated memory is still 1.0 GB. Free memory is still 949.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 134.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 949.0 MB in the beginning and 1.1 GB in the end (delta: -120.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5468.08 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.9 MB). Free memory was 1.1 GB in the beginning and 837.2 MB in the end (delta: 232.6 MB). Peak memory consumption was 403.5 MB. Max. memory is 11.5 GB. * Witness Printer took 32.24 ms. Allocated memory is still 1.3 GB. Free memory was 837.2 MB in the beginning and 829.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 15; VAL [input=15] [L11] CALL, EXPR id(input) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=15, input=15] [L11] int result = id(input); [L12] COND TRUE result == 15 VAL [input=15, result=15] [L13] __VERIFIER_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 5.4s OverallTime, 16 OverallIterations, 16 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 208 SDslu, 2387 SDs, 0 SdLazy, 1194 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1229 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1740 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 241800 SizeOfPredicates, 100 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...