./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/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 0c292d0c9d9c055df9398b3303a92d6621b60758 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-1dbac8b [2018-11-10 12:39:11,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:39:11,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:39:11,543 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:39:11,544 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:39:11,544 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:39:11,545 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:39:11,546 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:39:11,547 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:39:11,548 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:39:11,549 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:39:11,549 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:39:11,549 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:39:11,550 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:39:11,551 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:39:11,551 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:39:11,552 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:39:11,553 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:39:11,555 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:39:11,556 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:39:11,556 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:39:11,557 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:39:11,559 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:39:11,559 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:39:11,559 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:39:11,560 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:39:11,561 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:39:11,561 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:39:11,562 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:39:11,562 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:39:11,563 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:39:11,563 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:39:11,563 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:39:11,563 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:39:11,564 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:39:11,564 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:39:11,565 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 12:39:11,575 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:39:11,575 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:39:11,576 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:39:11,576 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:39:11,576 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:39:11,576 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:39:11,577 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:39:11,577 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:39:11,578 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:39:11,578 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:39:11,579 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:39:11,579 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:39:11,580 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:39:11,580 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:39:11,580 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_261b4da8-5936-49d7-9d7f-3d9669ac8bee/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 -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2018-11-10 12:39:11,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:39:11,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:39:11,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:39:11,617 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:39:11,617 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:39:11,617 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 12:39:11,662 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/data/4a46b64c0/8a93f65f5a964d0681dc1097044b8a10/FLAGf474ff788 [2018-11-10 12:39:11,994 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:39:11,995 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/sv-benchmarks/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 12:39:12,000 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/data/4a46b64c0/8a93f65f5a964d0681dc1097044b8a10/FLAGf474ff788 [2018-11-10 12:39:12,012 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/data/4a46b64c0/8a93f65f5a964d0681dc1097044b8a10 [2018-11-10 12:39:12,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:39:12,015 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:39:12,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:39:12,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:39:12,019 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:39:12,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32089edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12, skipping insertion in model container [2018-11-10 12:39:12,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:39:12,043 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:39:12,146 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:39:12,148 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:39:12,156 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:39:12,164 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:39:12,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12 WrapperNode [2018-11-10 12:39:12,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:39:12,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:39:12,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:39:12,165 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:39:12,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... [2018-11-10 12:39:12,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:39:12,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:39:12,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:39:12,180 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:39:12,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:39:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:39:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:39:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 12:39:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:39:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 12:39:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:39:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 12:39:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:39:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:39:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:39:12,343 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:39:12,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:39:12 BoogieIcfgContainer [2018-11-10 12:39:12,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:39:12,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:39:12,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:39:12,347 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:39:12,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:39:12" (1/3) ... [2018-11-10 12:39:12,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e655ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:39:12, skipping insertion in model container [2018-11-10 12:39:12,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:39:12" (2/3) ... [2018-11-10 12:39:12,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e655ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:39:12, skipping insertion in model container [2018-11-10 12:39:12,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:39:12" (3/3) ... [2018-11-10 12:39:12,350 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 12:39:12,355 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:39:12,360 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:39:12,369 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:39:12,388 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:39:12,388 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:39:12,388 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:39:12,388 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:39:12,388 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:39:12,389 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:39:12,389 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:39:12,389 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:39:12,389 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:39:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 12:39:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 12:39:12,404 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:12,404 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:12,406 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:12,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 12:39:12,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:12,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:12,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:12,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:39:12,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:39:12,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 12:39:12,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 12:39:12,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:39:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:39:12,557 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 12:39:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:12,596 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-10 12:39:12,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:39:12,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 12:39:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:12,605 INFO L225 Difference]: With dead ends: 32 [2018-11-10 12:39:12,605 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 12:39:12,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:39:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 12:39:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 12:39:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 12:39:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 12:39:12,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 12:39:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:12,632 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 12:39:12,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 12:39:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 12:39:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:39:12,633 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:12,634 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:12,634 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:12,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:12,634 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 12:39:12,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:12,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:12,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:12,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:39:12,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:12,736 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:12,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:12,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:39:12,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:12,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 12:39:12,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 12:39:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 12:39:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:39:12,823 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-11-10 12:39:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:12,838 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 12:39:12,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:39:12,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-10 12:39:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:12,839 INFO L225 Difference]: With dead ends: 25 [2018-11-10 12:39:12,839 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 12:39:12,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:39:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 12:39:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 12:39:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 12:39:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 12:39:12,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 12:39:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:12,844 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 12:39:12,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 12:39:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 12:39:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 12:39:12,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:12,845 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:12,845 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:12,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 12:39:12,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:12,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:12,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:12,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:39:12,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:12,953 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:12,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:39:12,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:39:12,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:12,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 12:39:13,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:13,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 12:39:13,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 12:39:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 12:39:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:39:13,017 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-11-10 12:39:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:13,045 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 12:39:13,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 12:39:13,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-10 12:39:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:13,046 INFO L225 Difference]: With dead ends: 28 [2018-11-10 12:39:13,046 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 12:39:13,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:39:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 12:39:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 12:39:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 12:39:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 12:39:13,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 12:39:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:13,050 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 12:39:13,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 12:39:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 12:39:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 12:39:13,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:13,051 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:13,051 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:13,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 12:39:13,051 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:13,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:13,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:13,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:39:13,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:13,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:13,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:39:13,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 12:39:13,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:13,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 12:39:13,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:13,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 12:39:13,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 12:39:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 12:39:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:39:13,240 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-10 12:39:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:13,271 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 12:39:13,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 12:39:13,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-10 12:39:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:13,272 INFO L225 Difference]: With dead ends: 31 [2018-11-10 12:39:13,272 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 12:39:13,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:39:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 12:39:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 12:39:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 12:39:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 12:39:13,276 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 12:39:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:13,276 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 12:39:13,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 12:39:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 12:39:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 12:39:13,277 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:13,277 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:13,277 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:13,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 12:39:13,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:13,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:39:13,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:13,413 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:13,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:39:13,435 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:39:13,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:13,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 12:39:13,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:13,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 12:39:13,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 12:39:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 12:39:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:39:13,470 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2018-11-10 12:39:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:13,548 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 12:39:13,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 12:39:13,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-10 12:39:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:13,550 INFO L225 Difference]: With dead ends: 34 [2018-11-10 12:39:13,550 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 12:39:13,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:39:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 12:39:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 12:39:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 12:39:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 12:39:13,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 12:39:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:13,555 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 12:39:13,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 12:39:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 12:39:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 12:39:13,556 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:13,556 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:13,556 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:13,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 12:39:13,556 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:13,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:13,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:13,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:39:13,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:13,710 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:13,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:39:13,767 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 12:39:13,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:13,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 12:39:13,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:13,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 12:39:13,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 12:39:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 12:39:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:39:13,798 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-10 12:39:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:13,854 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 12:39:13,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 12:39:13,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-10 12:39:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:13,855 INFO L225 Difference]: With dead ends: 37 [2018-11-10 12:39:13,856 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 12:39:13,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 12:39:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 12:39:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 12:39:13,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 12:39:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 12:39:13,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 12:39:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:13,860 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 12:39:13,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 12:39:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 12:39:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 12:39:13,861 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:13,861 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:13,861 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:13,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 12:39:13,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:13,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:13,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:13,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:39:14,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:14,070 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:14,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:39:14,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 12:39:14,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:14,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 12:39:14,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:14,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 12:39:14,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 12:39:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 12:39:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-10 12:39:14,131 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-11-10 12:39:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:14,213 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 12:39:14,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 12:39:14,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-10 12:39:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:14,214 INFO L225 Difference]: With dead ends: 40 [2018-11-10 12:39:14,214 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 12:39:14,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-10 12:39:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 12:39:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 12:39:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 12:39:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 12:39:14,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 12:39:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:14,218 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 12:39:14,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 12:39:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 12:39:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 12:39:14,219 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:14,219 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:14,219 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:14,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 12:39:14,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:14,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:14,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:14,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:39:14,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:14,424 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:14,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:14,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 12:39:14,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:14,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 12:39:14,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 12:39:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 12:39:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-10 12:39:14,485 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2018-11-10 12:39:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:14,549 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 12:39:14,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 12:39:14,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-11-10 12:39:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:14,550 INFO L225 Difference]: With dead ends: 43 [2018-11-10 12:39:14,550 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 12:39:14,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-10 12:39:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 12:39:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 12:39:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 12:39:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 12:39:14,554 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 12:39:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:14,554 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 12:39:14,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 12:39:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 12:39:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 12:39:14,555 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:14,555 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:14,555 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:14,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:14,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 12:39:14,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:14,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:14,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:39:14,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:39:14,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:14,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:14,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:39:14,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:39:14,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:14,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 12:39:14,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:14,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-10 12:39:14,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 12:39:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 12:39:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-10 12:39:14,798 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2018-11-10 12:39:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:14,905 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 12:39:14,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 12:39:14,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-11-10 12:39:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:14,906 INFO L225 Difference]: With dead ends: 46 [2018-11-10 12:39:14,906 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 12:39:14,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-10 12:39:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 12:39:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 12:39:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 12:39:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 12:39:14,911 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 12:39:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:14,911 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 12:39:14,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 12:39:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 12:39:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 12:39:14,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:14,912 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:14,913 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:14,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 12:39:14,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:14,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:14,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:14,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:39:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:39:15,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:39:15,144 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:39:15,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:39:15,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 12:39:15,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:39:15,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:39:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 12:39:15,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:39:15,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-10 12:39:15,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 12:39:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 12:39:15,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-10 12:39:15,275 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2018-11-10 12:39:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:39:15,423 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 12:39:15,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 12:39:15,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-11-10 12:39:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:39:15,424 INFO L225 Difference]: With dead ends: 49 [2018-11-10 12:39:15,424 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 12:39:15,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-10 12:39:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 12:39:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 12:39:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 12:39:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 12:39:15,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 12:39:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:39:15,428 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 12:39:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 12:39:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 12:39:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 12:39:15,429 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:39:15,429 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:39:15,429 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:39:15,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:39:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 12:39:15,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:39:15,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:39:15,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:15,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:39:15,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:39:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:39:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:39:15,499 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 12:39:15,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:39:15 BoogieIcfgContainer [2018-11-10 12:39:15,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 12:39:15,525 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:39:15,525 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:39:15,525 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:39:15,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:39:12" (3/4) ... [2018-11-10 12:39:15,527 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 12:39:15,563 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_261b4da8-5936-49d7-9d7f-3d9669ac8bee/bin-2019/uautomizer/witness.graphml [2018-11-10 12:39:15,563 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:39:15,564 INFO L168 Benchmark]: Toolchain (without parser) took 3549.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 960.3 MB in the beginning and 1.1 GB in the end (delta: -138.5 MB). Peak memory consumption was 38.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:39:15,565 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:39:15,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.94 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:39:15,566 INFO L168 Benchmark]: Boogie Preprocessor took 14.41 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:39:15,566 INFO L168 Benchmark]: RCFGBuilder took 164.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -183.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 12:39:15,566 INFO L168 Benchmark]: TraceAbstraction took 3180.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 64.3 MB. Max. memory is 11.5 GB. [2018-11-10 12:39:15,567 INFO L168 Benchmark]: Witness Printer took 38.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-11-10 12:39:15,568 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 148.94 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.41 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 164.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -183.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3180.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 64.3 MB. Max. memory is 11.5 GB. * Witness Printer took 38.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 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] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) 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] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=10, input=10] [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.1s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2772 SDs, 0 SdLazy, 1181 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 389 SyntacticMatches, 9 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 860 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 135648 SizeOfPredicates, 9 NumberOfNonLiveVariables, 810 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...