./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:10:39,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:10:39,389 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:10:39,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:10:39,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:10:39,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:10:39,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:10:39,445 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:10:39,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:10:39,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:10:39,452 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:10:39,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:10:39,453 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:10:39,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:10:39,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:10:39,456 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:10:39,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:10:39,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:10:39,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:10:39,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:10:39,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:10:39,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:10:39,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:10:39,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:10:39,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:10:39,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:10:39,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:10:39,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:10:39,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:39,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:10:39,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:10:39,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:10:39,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:10:39,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:10:39,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:10:39,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:10:39,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:10:39,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:10:39,466 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:10:39,466 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d [2023-11-06 23:10:39,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:10:39,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:10:39,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:10:39,874 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:10:39,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:10:39,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/recursive-simple/id_o20.c [2023-11-06 23:10:43,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:10:43,307 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:10:43,308 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/sv-benchmarks/c/recursive-simple/id_o20.c [2023-11-06 23:10:43,320 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/data/eea75d60c/6dbc58514fb944b9a411606d1d8cc7fe/FLAG3d9244653 [2023-11-06 23:10:43,337 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/data/eea75d60c/6dbc58514fb944b9a411606d1d8cc7fe [2023-11-06 23:10:43,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:10:43,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:10:43,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:43,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:10:43,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:10:43,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4106acc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43, skipping insertion in model container [2023-11-06 23:10:43,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,375 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:10:43,536 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/sv-benchmarks/c/recursive-simple/id_o20.c[516,529] [2023-11-06 23:10:43,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:43,559 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:10:43,578 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/sv-benchmarks/c/recursive-simple/id_o20.c[516,529] [2023-11-06 23:10:43,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:43,596 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:10:43,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43 WrapperNode [2023-11-06 23:10:43,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:43,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:43,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:10:43,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:10:43,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,636 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-11-06 23:10:43,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:43,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:10:43,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:10:43,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:10:43,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,649 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:10:43,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:10:43,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:10:43,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:10:43,662 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (1/1) ... [2023-11-06 23:10:43,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:43,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:10:43,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:10:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:10:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:10:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:10:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:10:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-11-06 23:10:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-11-06 23:10:43,811 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:10:43,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:10:43,936 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:10:43,943 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:10:43,943 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 23:10:43,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:43 BoogieIcfgContainer [2023-11-06 23:10:43,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:10:43,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:10:43,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:10:43,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:10:43,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:10:43" (1/3) ... [2023-11-06 23:10:43,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c6befa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:43, skipping insertion in model container [2023-11-06 23:10:43,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:43" (2/3) ... [2023-11-06 23:10:43,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c6befa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:43, skipping insertion in model container [2023-11-06 23:10:43,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:43" (3/3) ... [2023-11-06 23:10:43,957 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o20.c [2023-11-06 23:10:43,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:10:43,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:10:44,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:10:44,048 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3af48096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:10:44,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:10:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:10:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 23:10:44,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:44,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:44,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:44,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-11-06 23:10:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:44,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741081542] [2023-11-06 23:10:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:44,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:44,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741081542] [2023-11-06 23:10:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741081542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:10:44,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686016382] [2023-11-06 23:10:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:10:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:10:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:44,544 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 23:10:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:44,620 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-06 23:10:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:10:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 23:10:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:44,631 INFO L225 Difference]: With dead ends: 26 [2023-11-06 23:10:44,632 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 23:10:44,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:44,639 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:44,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 23:10:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 23:10:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:10:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-06 23:10:44,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-11-06 23:10:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:44,686 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-06 23:10:44,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 23:10:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-06 23:10:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:10:44,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:44,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:44,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:10:44,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:44,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-11-06 23:10:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:44,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607132130] [2023-11-06 23:10:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:45,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607132130] [2023-11-06 23:10:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607132130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193200333] [2023-11-06 23:10:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:45,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:45,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:45,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:45,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:10:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:45,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:10:45,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:45,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193200333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:45,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:10:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786686972] [2023-11-06 23:10:45,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:45,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:10:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:10:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:45,507 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:10:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:45,567 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-06 23:10:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:10:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-11-06 23:10:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:45,570 INFO L225 Difference]: With dead ends: 27 [2023-11-06 23:10:45,571 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 23:10:45,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:45,575 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:45,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 23:10:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 23:10:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 23:10:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 23:10:45,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-11-06 23:10:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:45,588 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 23:10:45,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:10:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 23:10:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:10:45,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:45,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:45,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:45,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:45,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:45,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:45,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2023-11-06 23:10:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:45,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301617967] [2023-11-06 23:10:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:46,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:46,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301617967] [2023-11-06 23:10:46,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301617967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643330373] [2023-11-06 23:10:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:46,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:46,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:46,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:10:46,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:46,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:46,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:46,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:46,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643330373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:46,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-06 23:10:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328428248] [2023-11-06 23:10:46,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:10:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:10:46,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:10:46,791 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-06 23:10:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:47,068 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-11-06 23:10:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:10:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2023-11-06 23:10:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:47,070 INFO L225 Difference]: With dead ends: 39 [2023-11-06 23:10:47,070 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 23:10:47,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:10:47,072 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:47,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 205 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 23:10:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 23:10:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-06 23:10:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-06 23:10:47,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-11-06 23:10:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:47,081 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-06 23:10:47,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-06 23:10:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-06 23:10:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 23:10:47,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:47,083 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:47,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:47,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:10:47,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:47,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:47,285 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2023-11-06 23:10:47,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:47,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167793629] [2023-11-06 23:10:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:47,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-06 23:10:48,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167793629] [2023-11-06 23:10:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167793629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:48,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836570145] [2023-11-06 23:10:48,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:48,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:48,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:48,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:48,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-06 23:10:48,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:48,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 23:10:48,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-06 23:10:48,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-06 23:10:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836570145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:49,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-11-06 23:10:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085067547] [2023-11-06 23:10:49,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 23:10:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 23:10:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:10:49,708 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-06 23:10:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:54,482 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-11-06 23:10:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:10:54,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2023-11-06 23:10:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:54,485 INFO L225 Difference]: With dead ends: 63 [2023-11-06 23:10:54,485 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 23:10:54,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:10:54,487 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:54,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 484 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 23:10:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-06 23:10:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-06 23:10:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-06 23:10:54,502 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-11-06 23:10:54,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:54,502 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-06 23:10:54,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-06 23:10:54,503 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-06 23:10:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-06 23:10:54,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:54,509 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:54,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:54,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:54,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:54,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:54,717 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2023-11-06 23:10:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166856737] [2023-11-06 23:10:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:56,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:10:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-06 23:10:58,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:58,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166856737] [2023-11-06 23:10:58,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166856737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427171461] [2023-11-06 23:10:58,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:58,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:58,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:58,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:58,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:58,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:58,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 23:10:58,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-06 23:10:58,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-06 23:11:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427171461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:01,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:01,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-11-06 23:11:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444232467] [2023-11-06 23:11:01,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-06 23:11:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-06 23:11:01,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 23:11:01,571 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-11-06 23:11:24,254 WARN L293 SmtUtils]: Spent 15.07s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:11:44,363 WARN L293 SmtUtils]: Spent 14.39s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:12:00,495 WARN L293 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:12:15,040 WARN L293 SmtUtils]: Spent 10.79s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:12:29,757 WARN L293 SmtUtils]: Spent 10.28s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:12:40,381 WARN L293 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:12:52,489 WARN L293 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:01,882 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:08,911 WARN L293 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:16,510 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:24,189 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:32,108 WARN L293 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:53,617 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-11-06 23:13:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 23:13:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2023-11-06 23:13:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:53,622 INFO L225 Difference]: With dead ends: 111 [2023-11-06 23:13:53,622 INFO L226 Difference]: Without dead ends: 105 [2023-11-06 23:13:53,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 172.3s TimeCoverageRelationStatistics Valid=1291, Invalid=8021, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 23:13:53,627 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:53,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1454 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 23:13:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-06 23:13:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-06 23:13:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (34), 32 states have call predecessors, (34), 2 states have call successors, (34) [2023-11-06 23:13:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2023-11-06 23:13:53,642 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2023-11-06 23:13:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:53,643 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2023-11-06 23:13:53,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-11-06 23:13:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2023-11-06 23:13:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 23:13:53,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:53,646 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:53,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:53,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:53,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 5 times [2023-11-06 23:13:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330348157] [2023-11-06 23:13:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:13:53,974 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:13:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:13:54,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:13:54,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:13:54,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 23:13:54,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:13:54,109 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-11-06 23:13:54,114 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 23:13:54,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:13:54 BoogieIcfgContainer [2023-11-06 23:13:54,177 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 23:13:54,177 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 23:13:54,177 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 23:13:54,178 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 23:13:54,178 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:43" (3/4) ... [2023-11-06 23:13:54,179 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 23:13:54,224 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 23:13:54,225 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 23:13:54,225 INFO L158 Benchmark]: Toolchain (without parser) took 190878.41ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 109.1MB in the beginning and 85.3MB in the end (delta: 23.7MB). Peak memory consumption was 110.8MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,226 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory is still 54.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:13:54,226 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.65ms. Allocated memory is still 146.8MB. Free memory was 109.1MB in the beginning and 99.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,226 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.39ms. Allocated memory is still 146.8MB. Free memory was 98.6MB in the beginning and 97.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,227 INFO L158 Benchmark]: Boogie Preprocessor took 22.55ms. Allocated memory is still 146.8MB. Free memory was 97.3MB in the beginning and 96.5MB in the end (delta: 792.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:13:54,227 INFO L158 Benchmark]: RCFGBuilder took 285.56ms. Allocated memory is still 146.8MB. Free memory was 96.5MB in the beginning and 87.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,228 INFO L158 Benchmark]: TraceAbstraction took 190227.36ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 86.8MB in the beginning and 88.5MB in the end (delta: -1.7MB). Peak memory consumption was 83.5MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,228 INFO L158 Benchmark]: Witness Printer took 47.47ms. Allocated memory is still 230.7MB. Free memory was 88.5MB in the beginning and 85.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 23:13:54,230 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory is still 54.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.65ms. Allocated memory is still 146.8MB. Free memory was 109.1MB in the beginning and 99.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.39ms. Allocated memory is still 146.8MB. Free memory was 98.6MB in the beginning and 97.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.55ms. Allocated memory is still 146.8MB. Free memory was 97.3MB in the beginning and 96.5MB in the end (delta: 792.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 285.56ms. Allocated memory is still 146.8MB. Free memory was 96.5MB in the beginning and 87.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 190227.36ms. Allocated memory was 146.8MB in the beginning and 230.7MB in the end (delta: 83.9MB). Free memory was 86.8MB in the beginning and 88.5MB in the end (delta: -1.7MB). Peak memory consumption was 83.5MB. Max. memory is 16.1GB. * Witness Printer took 47.47ms. Allocated memory is still 230.7MB. Free memory was 88.5MB in the beginning and 85.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=20, input=20] [L13] unsigned int result = id(input); [L14] COND TRUE result == 20 VAL [input=20, result=20] [L15] reach_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 190.1s, OverallIterations: 6, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 177.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 2285 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2164 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1054 IncrementalHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 121 mSDtfsCounter, 1054 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 178.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=5, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 532 NumberOfCodeBlocks, 532 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 585 ConstructedInterpolants, 0 QuantifiedInterpolants, 1619 SizeOfPredicates, 0 NumberOfNonLiveVariables, 472 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 1317/2634 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-06 23:13:54,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6677da0e-f853-4b13-8994-1efe5b1c3999/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE