./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfcc0c3466e0ad99a1193d0083cedd3fc450234fcd184acb12bef00501b42460 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:05:40,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:05:40,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:05:40,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:05:40,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:05:40,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:05:40,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:05:40,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:05:40,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:05:40,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:05:40,324 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:05:40,325 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:05:40,325 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:05:40,325 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:05:40,325 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:05:40,325 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:05:40,325 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:05:40,326 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:05:40,326 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:05:40,326 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:05:40,326 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:05:40,326 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:05:40,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:05:40,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:05:40,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:05:40,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:05:40,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:05:40,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:05:40,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:05:40,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:05:40,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:05:40,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:05:40,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:05:40,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:05:40,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:05:40,335 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:05:40,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:05:40,335 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfcc0c3466e0ad99a1193d0083cedd3fc450234fcd184acb12bef00501b42460 [2024-11-14 04:05:40,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:05:40,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:05:40,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:05:40,735 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:05:40,735 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:05:40,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c Unable to find full path for "g++" [2024-11-14 04:05:42,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:05:43,297 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:05:43,298 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/sv-benchmarks/c/eca-rers2012/Problem02_label32.c [2024-11-14 04:05:43,321 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/data/19796e607/2e2569902833417e88b245b0df37a740/FLAGad1757809 [2024-11-14 04:05:43,343 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/data/19796e607/2e2569902833417e88b245b0df37a740 [2024-11-14 04:05:43,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:05:43,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:05:43,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:05:43,350 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:05:43,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:05:43,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:43,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffac9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43, skipping insertion in model container [2024-11-14 04:05:43,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:43,414 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:05:43,788 WARN L250 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_084055b6-488c-480c-a5e8-88d4adee5971/sv-benchmarks/c/eca-rers2012/Problem02_label32.c[17811,17824] [2024-11-14 04:05:43,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:05:43,838 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:05:43,922 WARN L250 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_084055b6-488c-480c-a5e8-88d4adee5971/sv-benchmarks/c/eca-rers2012/Problem02_label32.c[17811,17824] [2024-11-14 04:05:43,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:05:43,955 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:05:43,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43 WrapperNode [2024-11-14 04:05:43,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:05:43,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:05:43,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:05:43,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:05:43,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:43,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,043 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 668 [2024-11-14 04:05:44,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:05:44,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:05:44,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:05:44,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:05:44,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:05:44,114 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:05:44,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:05:44,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:05:44,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (1/1) ... [2024-11-14 04:05:44,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:05:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:44,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:05:44,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:05:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:05:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:05:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:05:44,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:05:44,329 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:05:44,331 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:05:46,066 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-11-14 04:05:46,066 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:05:46,509 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:05:46,509 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:05:46,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:05:46 BoogieIcfgContainer [2024-11-14 04:05:46,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:05:46,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:05:46,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:05:46,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:05:46,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:05:43" (1/3) ... [2024-11-14 04:05:46,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5367b33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:05:46, skipping insertion in model container [2024-11-14 04:05:46,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:05:43" (2/3) ... [2024-11-14 04:05:46,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5367b33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:05:46, skipping insertion in model container [2024-11-14 04:05:46,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:05:46" (3/3) ... [2024-11-14 04:05:46,523 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2024-11-14 04:05:46,543 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:05:46,545 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem02_label32.c that has 1 procedures, 85 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:05:46,629 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:05:46,643 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@f94b9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:05:46,643 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:05:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 04:05:46,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:46,663 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:46,663 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:46,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 545127347, now seen corresponding path program 1 times [2024-11-14 04:05:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:46,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905792344] [2024-11-14 04:05:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:47,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905792344] [2024-11-14 04:05:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905792344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:47,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:05:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:05:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826076075] [2024-11-14 04:05:47,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:47,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:47,440 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:48,218 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2024-11-14 04:05:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-14 04:05:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:48,238 INFO L225 Difference]: With dead ends: 251 [2024-11-14 04:05:48,239 INFO L226 Difference]: Without dead ends: 163 [2024-11-14 04:05:48,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:48,247 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:48,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:05:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-14 04:05:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-14 04:05:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7777777777777777) internal successors, (288), 162 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2024-11-14 04:05:48,327 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 80 [2024-11-14 04:05:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:48,329 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2024-11-14 04:05:48,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2024-11-14 04:05:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 04:05:48,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:48,336 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:48,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:05:48,336 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:48,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1724847950, now seen corresponding path program 1 times [2024-11-14 04:05:48,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:48,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727259355] [2024-11-14 04:05:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:48,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727259355] [2024-11-14 04:05:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727259355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:48,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:05:48,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:05:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953652676] [2024-11-14 04:05:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:48,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:48,841 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:49,451 INFO L93 Difference]: Finished difference Result 487 states and 862 transitions. [2024-11-14 04:05:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-14 04:05:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:49,453 INFO L225 Difference]: With dead ends: 487 [2024-11-14 04:05:49,454 INFO L226 Difference]: Without dead ends: 325 [2024-11-14 04:05:49,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:49,457 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:49,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 26 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:05:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-14 04:05:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2024-11-14 04:05:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.673913043478261) internal successors, (539), 322 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 539 transitions. [2024-11-14 04:05:49,508 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 539 transitions. Word has length 98 [2024-11-14 04:05:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:49,509 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 539 transitions. [2024-11-14 04:05:49,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 539 transitions. [2024-11-14 04:05:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 04:05:49,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:49,517 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:49,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:05:49,518 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:49,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676991, now seen corresponding path program 1 times [2024-11-14 04:05:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:49,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479856946] [2024-11-14 04:05:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:49,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479856946] [2024-11-14 04:05:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479856946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:49,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:05:49,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:05:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182856502] [2024-11-14 04:05:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:49,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:49,795 INFO L87 Difference]: Start difference. First operand 323 states and 539 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:50,067 INFO L93 Difference]: Finished difference Result 645 states and 1077 transitions. [2024-11-14 04:05:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-14 04:05:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:50,070 INFO L225 Difference]: With dead ends: 645 [2024-11-14 04:05:50,072 INFO L226 Difference]: Without dead ends: 323 [2024-11-14 04:05:50,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:50,078 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:50,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:05:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-14 04:05:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2024-11-14 04:05:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5186335403726707) internal successors, (489), 322 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 489 transitions. [2024-11-14 04:05:50,113 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 489 transitions. Word has length 99 [2024-11-14 04:05:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:50,113 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 489 transitions. [2024-11-14 04:05:50,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 489 transitions. [2024-11-14 04:05:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:05:50,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:50,119 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:50,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:05:50,119 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:50,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1105116063, now seen corresponding path program 1 times [2024-11-14 04:05:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:50,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118951802] [2024-11-14 04:05:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:50,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:50,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:50,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118951802] [2024-11-14 04:05:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118951802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:50,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:05:50,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:05:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030723411] [2024-11-14 04:05:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:50,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:50,317 INFO L87 Difference]: Start difference. First operand 323 states and 489 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:50,834 INFO L93 Difference]: Finished difference Result 965 states and 1464 transitions. [2024-11-14 04:05:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-14 04:05:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:50,838 INFO L225 Difference]: With dead ends: 965 [2024-11-14 04:05:50,838 INFO L226 Difference]: Without dead ends: 643 [2024-11-14 04:05:50,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:50,840 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:50,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:05:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-11-14 04:05:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2024-11-14 04:05:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.3068535825545171) internal successors, (839), 642 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 839 transitions. [2024-11-14 04:05:50,886 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 839 transitions. Word has length 104 [2024-11-14 04:05:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:50,886 INFO L471 AbstractCegarLoop]: Abstraction has 643 states and 839 transitions. [2024-11-14 04:05:50,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 839 transitions. [2024-11-14 04:05:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 04:05:50,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:50,894 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:50,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:05:50,894 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:50,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1555705024, now seen corresponding path program 1 times [2024-11-14 04:05:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:50,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931860599] [2024-11-14 04:05:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:05:51,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:51,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931860599] [2024-11-14 04:05:51,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931860599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:51,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790469377] [2024-11-14 04:05:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:51,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:51,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:51,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:51,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:05:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:51,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:05:51,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:05:51,903 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:05:51,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790469377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:51,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:05:51,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 04:05:51,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364119932] [2024-11-14 04:05:51,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:51,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:51,907 INFO L87 Difference]: Start difference. First operand 643 states and 839 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:52,442 INFO L93 Difference]: Finished difference Result 1525 states and 2038 transitions. [2024-11-14 04:05:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-14 04:05:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:52,448 INFO L225 Difference]: With dead ends: 1525 [2024-11-14 04:05:52,449 INFO L226 Difference]: Without dead ends: 883 [2024-11-14 04:05:52,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:52,452 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:52,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:05:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-11-14 04:05:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2024-11-14 04:05:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.280045351473923) internal successors, (1129), 882 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1129 transitions. [2024-11-14 04:05:52,513 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1129 transitions. Word has length 107 [2024-11-14 04:05:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:52,514 INFO L471 AbstractCegarLoop]: Abstraction has 883 states and 1129 transitions. [2024-11-14 04:05:52,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1129 transitions. [2024-11-14 04:05:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:05:52,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:52,519 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:52,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:05:52,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:52,723 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:52,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1010346658, now seen corresponding path program 1 times [2024-11-14 04:05:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:52,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228784457] [2024-11-14 04:05:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:05:52,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228784457] [2024-11-14 04:05:52,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228784457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:52,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:05:52,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:05:52,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970852522] [2024-11-14 04:05:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:52,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:52,892 INFO L87 Difference]: Start difference. First operand 883 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:53,331 INFO L93 Difference]: Finished difference Result 1845 states and 2352 transitions. [2024-11-14 04:05:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-11-14 04:05:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:53,335 INFO L225 Difference]: With dead ends: 1845 [2024-11-14 04:05:53,337 INFO L226 Difference]: Without dead ends: 803 [2024-11-14 04:05:53,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:05:53,343 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:53,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 16 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:05:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2024-11-14 04:05:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2024-11-14 04:05:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.1633416458852868) internal successors, (933), 802 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 933 transitions. [2024-11-14 04:05:53,390 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 933 transitions. Word has length 124 [2024-11-14 04:05:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:53,391 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 933 transitions. [2024-11-14 04:05:53,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 933 transitions. [2024-11-14 04:05:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 04:05:53,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:53,397 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:53,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:05:53,397 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:53,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:53,398 INFO L85 PathProgramCache]: Analyzing trace with hash -392075116, now seen corresponding path program 1 times [2024-11-14 04:05:53,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:53,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472109458] [2024-11-14 04:05:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:53,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:05:53,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472109458] [2024-11-14 04:05:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472109458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991807989] [2024-11-14 04:05:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:53,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:53,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:53,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:05:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:54,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:05:54,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 04:05:54,305 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:05:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991807989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:54,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:05:54,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-14 04:05:54,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849115374] [2024-11-14 04:05:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:54,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:54,308 INFO L87 Difference]: Start difference. First operand 803 states and 933 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:54,683 INFO L93 Difference]: Finished difference Result 1045 states and 1214 transitions. [2024-11-14 04:05:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-14 04:05:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:54,689 INFO L225 Difference]: With dead ends: 1045 [2024-11-14 04:05:54,689 INFO L226 Difference]: Without dead ends: 1043 [2024-11-14 04:05:54,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:54,691 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:54,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:05:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2024-11-14 04:05:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 883. [2024-11-14 04:05:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.1780045351473922) internal successors, (1039), 882 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1039 transitions. [2024-11-14 04:05:54,727 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1039 transitions. Word has length 128 [2024-11-14 04:05:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:54,729 INFO L471 AbstractCegarLoop]: Abstraction has 883 states and 1039 transitions. [2024-11-14 04:05:54,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1039 transitions. [2024-11-14 04:05:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-14 04:05:54,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:54,735 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:54,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:05:54,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:05:54,940 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:54,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2051205657, now seen corresponding path program 1 times [2024-11-14 04:05:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751038073] [2024-11-14 04:05:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 87 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:05:55,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:55,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751038073] [2024-11-14 04:05:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751038073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053095544] [2024-11-14 04:05:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:55,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:55,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:55,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:05:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:55,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:05:55,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 04:05:55,843 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:05:55,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053095544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:05:55,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:05:55,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 04:05:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825020709] [2024-11-14 04:05:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:05:55,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:05:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:05:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:55,847 INFO L87 Difference]: Start difference. First operand 883 states and 1039 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:56,326 INFO L93 Difference]: Finished difference Result 1923 states and 2287 transitions. [2024-11-14 04:05:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:05:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2024-11-14 04:05:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:56,331 INFO L225 Difference]: With dead ends: 1923 [2024-11-14 04:05:56,331 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 04:05:56,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:05:56,334 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:56,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:05:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 04:05:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 04:05:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 04:05:56,336 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 154 [2024-11-14 04:05:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:56,336 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 04:05:56,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:05:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 04:05:56,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 04:05:56,340 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 04:05:56,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:05:56,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:05:56,548 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:56,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 04:05:56,748 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:05:56,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:05:56 BoogieIcfgContainer [2024-11-14 04:05:56,779 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:05:56,780 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:05:56,780 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:05:56,780 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:05:56,781 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:05:46" (3/4) ... [2024-11-14 04:05:56,783 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 04:05:56,813 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 128 nodes and edges [2024-11-14 04:05:56,815 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-14 04:05:56,817 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-14 04:05:56,818 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 04:05:57,010 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:05:57,011 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 04:05:57,012 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:05:57,013 INFO L158 Benchmark]: Toolchain (without parser) took 13665.64ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 90.8MB in the beginning and 110.3MB in the end (delta: -19.5MB). Peak memory consumption was 91.3MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,013 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:05:57,013 INFO L158 Benchmark]: CACSL2BoogieTranslator took 610.55ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 65.1MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,013 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.22ms. Allocated memory is still 117.4MB. Free memory was 64.9MB in the beginning and 59.9MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,014 INFO L158 Benchmark]: Boogie Preprocessor took 69.77ms. Allocated memory is still 117.4MB. Free memory was 59.9MB in the beginning and 55.8MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:05:57,014 INFO L158 Benchmark]: RCFGBuilder took 2395.60ms. Allocated memory is still 117.4MB. Free memory was 55.8MB in the beginning and 68.9MB in the end (delta: -13.0MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,014 INFO L158 Benchmark]: TraceAbstraction took 10264.05ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 68.3MB in the beginning and 123.0MB in the end (delta: -54.8MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,014 INFO L158 Benchmark]: Witness Printer took 232.01ms. Allocated memory is still 226.5MB. Free memory was 123.0MB in the beginning and 110.3MB in the end (delta: 12.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:05:57,018 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 610.55ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 65.1MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.22ms. Allocated memory is still 117.4MB. Free memory was 64.9MB in the beginning and 59.9MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.77ms. Allocated memory is still 117.4MB. Free memory was 59.9MB in the beginning and 55.8MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2395.60ms. Allocated memory is still 117.4MB. Free memory was 55.8MB in the beginning and 68.9MB in the end (delta: -13.0MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. * TraceAbstraction took 10264.05ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 68.3MB in the beginning and 123.0MB in the end (delta: -54.8MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * Witness Printer took 232.01ms. Allocated memory is still 226.5MB. Free memory was 123.0MB in the beginning and 110.3MB in the end (delta: 12.7MB). Peak memory consumption was 16.8MB. 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 - PositiveResult [Line: 509]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.9s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 417 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 417 mSDsluCounter, 372 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 408 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1714 IncrementalHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 408 mSolverCounterUnsat, 345 mSDtfsCounter, 1714 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 409 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=883occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 162 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1283 NumberOfCodeBlocks, 1283 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1272 ConstructedInterpolants, 0 QuantifiedInterpolants, 4716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 899 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 618/650 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: ((((((a17 == 8) && (a28 <= 10)) || ((a28 == 10) && (a17 <= 8))) || ((a17 == 8) && (a19 == 1))) || ((((a25 == a11) && (9 <= a28)) && (a17 <= 8)) && (a28 <= 10))) || ((((a25 == a11) && (a17 <= 8)) && (a19 == 1)) && (a28 <= 7))) RESULT: Ultimate proved your program to be correct! [2024-11-14 04:05:57,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084055b6-488c-480c-a5e8-88d4adee5971/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE