./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label46.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_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/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_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/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_34c6f902-eda2-42d6-a51a-552cc01edd1f/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 14408b329878540946fe7764dd35bdde7ddb2280d1dd9f9e09220bf70c4bb1b5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:15:49,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:15:49,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:15:49,172 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:15:49,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:15:49,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:15:49,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:15:49,212 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:15:49,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:15:49,213 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:15:49,214 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:15:49,215 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:15:49,215 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:15:49,215 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:15:49,215 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:15:49,216 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:15:49,216 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:15:49,216 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:15:49,216 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:15:49,216 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:15:49,216 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:15:49,217 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:15:49,217 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:15:49,217 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:15:49,217 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:15:49,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:15:49,219 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:15:49,219 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:15:49,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:15:49,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:15:49,219 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:15:49,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:15:49,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:15:49,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:15:49,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:15:49,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:15:49,221 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_34c6f902-eda2-42d6-a51a-552cc01edd1f/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 -> 14408b329878540946fe7764dd35bdde7ddb2280d1dd9f9e09220bf70c4bb1b5 [2024-11-14 04:15:49,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:15:49,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:15:49,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:15:49,574 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:15:49,575 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:15:49,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem01_label46.c Unable to find full path for "g++" [2024-11-14 04:15:51,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:15:51,828 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:15:51,829 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/sv-benchmarks/c/eca-rers2012/Problem01_label46.c [2024-11-14 04:15:51,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/data/3df31a84c/c1e373d4f52d4dc485d25cadb7b047a1/FLAG6a4d46051 [2024-11-14 04:15:52,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/data/3df31a84c/c1e373d4f52d4dc485d25cadb7b047a1 [2024-11-14 04:15:52,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:15:52,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:15:52,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:15:52,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:15:52,022 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:15:52,023 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,023 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4461025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52, skipping insertion in model container [2024-11-14 04:15:52,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,060 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:15:52,406 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_34c6f902-eda2-42d6-a51a-552cc01edd1f/sv-benchmarks/c/eca-rers2012/Problem01_label46.c[19475,19488] [2024-11-14 04:15:52,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:15:52,450 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:15:52,560 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_34c6f902-eda2-42d6-a51a-552cc01edd1f/sv-benchmarks/c/eca-rers2012/Problem01_label46.c[19475,19488] [2024-11-14 04:15:52,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:15:52,605 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:15:52,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52 WrapperNode [2024-11-14 04:15:52,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:15:52,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:15:52,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:15:52,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:15:52,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,707 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 657 [2024-11-14 04:15:52,708 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:15:52,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:15:52,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:15:52,709 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:15:52,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:15:52,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:15:52,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:15:52,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:15:52,763 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (1/1) ... [2024-11-14 04:15:52,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:15:52,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:15:52,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:15:52,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:15:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:15:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:15:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:15:52,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:15:52,960 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:15:52,963 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:15:54,523 INFO L? ?]: Removed 75 outVars from TransFormulas that were not future-live. [2024-11-14 04:15:54,525 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:15:54,929 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:15:54,933 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:15:54,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:15:54 BoogieIcfgContainer [2024-11-14 04:15:54,933 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:15:54,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:15:54,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:15:54,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:15:54,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:15:52" (1/3) ... [2024-11-14 04:15:54,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ad939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:15:54, skipping insertion in model container [2024-11-14 04:15:54,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:15:52" (2/3) ... [2024-11-14 04:15:54,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ad939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:15:54, skipping insertion in model container [2024-11-14 04:15:54,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:15:54" (3/3) ... [2024-11-14 04:15:54,949 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label46.c [2024-11-14 04:15:54,972 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:15:54,974 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem01_label46.c that has 1 procedures, 76 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:15:55,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:15:55,082 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;@478e9b6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:15:55,082 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:15:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 04:15:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:15:55,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:55,103 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] [2024-11-14 04:15:55,104 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:55,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash -131200266, now seen corresponding path program 1 times [2024-11-14 04:15:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:55,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242638183] [2024-11-14 04:15:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:55,947 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 04:15:55,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:55,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242638183] [2024-11-14 04:15:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242638183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:15:55,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:15:55,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:15:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267305750] [2024-11-14 04:15:55,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:15:55,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:15:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:15:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:15:55,984 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 04:15:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:56,712 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2024-11-14 04:15:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:15:56,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2024-11-14 04:15:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:56,731 INFO L225 Difference]: With dead ends: 224 [2024-11-14 04:15:56,732 INFO L226 Difference]: Without dead ends: 145 [2024-11-14 04:15:56,736 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 04:15:56,744 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:56,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 17 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:15:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-14 04:15:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-11-14 04:15:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.8819444444444444) internal successors, (271), 144 states have internal predecessors, (271), 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 04:15:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 271 transitions. [2024-11-14 04:15:56,810 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 271 transitions. Word has length 71 [2024-11-14 04:15:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:56,811 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 271 transitions. [2024-11-14 04:15:56,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 04:15:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 271 transitions. [2024-11-14 04:15:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 04:15:56,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:56,816 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-11-14 04:15:56,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:15:56,817 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:56,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1553027055, now seen corresponding path program 1 times [2024-11-14 04:15:56,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:56,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037407603] [2024-11-14 04:15:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:15:57,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037407603] [2024-11-14 04:15:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037407603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:15:57,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:15:57,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:15:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061612380] [2024-11-14 04:15:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:15:57,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:15:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:15:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:15:57,078 INFO L87 Difference]: Start difference. First operand 145 states and 271 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 04:15:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:57,706 INFO L93 Difference]: Finished difference Result 431 states and 810 transitions. [2024-11-14 04:15:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:15:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 76 [2024-11-14 04:15:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:57,709 INFO L225 Difference]: With dead ends: 431 [2024-11-14 04:15:57,709 INFO L226 Difference]: Without dead ends: 287 [2024-11-14 04:15:57,710 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 04:15:57,715 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:57,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 25 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:15:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-14 04:15:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2024-11-14 04:15:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.7622377622377623) internal successors, (504), 286 states have internal predecessors, (504), 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 04:15:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 504 transitions. [2024-11-14 04:15:57,769 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 504 transitions. Word has length 76 [2024-11-14 04:15:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:57,769 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 504 transitions. [2024-11-14 04:15:57,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 04:15:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 504 transitions. [2024-11-14 04:15:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 04:15:57,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:57,773 INFO L215 NwaCegarLoop]: trace histogram [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 04:15:57,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:15:57,773 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:57,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1590840822, now seen corresponding path program 1 times [2024-11-14 04:15:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395267141] [2024-11-14 04:15:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:57,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:15:58,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395267141] [2024-11-14 04:15:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395267141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:15:58,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:15:58,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:15:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954170585] [2024-11-14 04:15:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:15:58,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:15:58,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:15:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:15:58,231 INFO L87 Difference]: Start difference. First operand 287 states and 504 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 04:15:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:58,819 INFO L93 Difference]: Finished difference Result 786 states and 1371 transitions. [2024-11-14 04:15:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:15:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 86 [2024-11-14 04:15:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:58,825 INFO L225 Difference]: With dead ends: 786 [2024-11-14 04:15:58,826 INFO L226 Difference]: Without dead ends: 500 [2024-11-14 04:15:58,829 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 04:15:58,830 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:58,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 52 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:15:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-11-14 04:15:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 429. [2024-11-14 04:15:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.5934579439252337) internal successors, (682), 428 states have internal predecessors, (682), 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 04:15:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 682 transitions. [2024-11-14 04:15:58,890 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 682 transitions. Word has length 86 [2024-11-14 04:15:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:58,890 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 682 transitions. [2024-11-14 04:15:58,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 04:15:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 682 transitions. [2024-11-14 04:15:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 04:15:58,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:58,899 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-14 04:15:58,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:15:58,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:58,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2120208795, now seen corresponding path program 1 times [2024-11-14 04:15:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251113390] [2024-11-14 04:15:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:15:59,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251113390] [2024-11-14 04:15:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251113390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:15:59,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:15:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:15:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292260130] [2024-11-14 04:15:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:15:59,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:15:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:15:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:15:59,195 INFO L87 Difference]: Start difference. First operand 429 states and 682 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 04:15:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:59,686 INFO L93 Difference]: Finished difference Result 999 states and 1596 transitions. [2024-11-14 04:15:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:15:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 87 [2024-11-14 04:15:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:59,691 INFO L225 Difference]: With dead ends: 999 [2024-11-14 04:15:59,691 INFO L226 Difference]: Without dead ends: 571 [2024-11-14 04:15:59,692 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 04:15:59,693 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:59,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 70 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:15:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-11-14 04:15:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 500. [2024-11-14 04:15:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5330661322645291) internal successors, (765), 499 states have internal predecessors, (765), 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 04:15:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 765 transitions. [2024-11-14 04:15:59,730 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 765 transitions. Word has length 87 [2024-11-14 04:15:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:59,732 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 765 transitions. [2024-11-14 04:15:59,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 04:15:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 765 transitions. [2024-11-14 04:15:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 04:15:59,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:59,738 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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 04:15:59,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:15:59,739 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:59,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 39349469, now seen corresponding path program 1 times [2024-11-14 04:15:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466535746] [2024-11-14 04:15:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:16:00,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466535746] [2024-11-14 04:16:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466535746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127472967] [2024-11-14 04:16:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:00,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:00,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:16:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:00,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:00,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:00,517 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127472967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:00,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:00,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:16:00,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035816806] [2024-11-14 04:16:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:00,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:00,519 INFO L87 Difference]: Start difference. First operand 500 states and 765 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 04:16:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:00,979 INFO L93 Difference]: Finished difference Result 715 states and 1045 transitions. [2024-11-14 04:16:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 91 [2024-11-14 04:16:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:00,984 INFO L225 Difference]: With dead ends: 715 [2024-11-14 04:16:00,986 INFO L226 Difference]: Without dead ends: 713 [2024-11-14 04:16:00,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:00,988 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:00,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:16:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-11-14 04:16:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 500. [2024-11-14 04:16:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.531062124248497) internal successors, (764), 499 states have internal predecessors, (764), 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 04:16:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 764 transitions. [2024-11-14 04:16:01,017 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 764 transitions. Word has length 91 [2024-11-14 04:16:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:01,019 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 764 transitions. [2024-11-14 04:16:01,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 04:16:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 764 transitions. [2024-11-14 04:16:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 04:16:01,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:01,021 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 04:16:01,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:16:01,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:01,222 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:01,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1440359447, now seen corresponding path program 1 times [2024-11-14 04:16:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:01,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534032825] [2024-11-14 04:16:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:01,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 04:16:01,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:01,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534032825] [2024-11-14 04:16:01,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534032825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:01,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873759073] [2024-11-14 04:16:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:01,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:01,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:01,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:01,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:16:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:01,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:01,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 04:16:02,153 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873759073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:02,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:16:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776377376] [2024-11-14 04:16:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:02,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:02,156 INFO L87 Difference]: Start difference. First operand 500 states and 764 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 04:16:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:02,642 INFO L93 Difference]: Finished difference Result 997 states and 1526 transitions. [2024-11-14 04:16:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 130 [2024-11-14 04:16:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:02,644 INFO L225 Difference]: With dead ends: 997 [2024-11-14 04:16:02,644 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 04:16:02,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:02,647 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:02,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:16:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 04:16:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 04:16:02,648 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 04:16:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 04:16:02,649 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2024-11-14 04:16:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:02,649 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 04:16:02,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 04:16:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 04:16:02,650 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 04:16:02,653 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 04:16:02,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:02,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:02,860 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-14 04:16:02,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 04:16:02,955 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:16:02,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:16:02 BoogieIcfgContainer [2024-11-14 04:16:02,974 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:16:02,975 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:16:02,975 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:16:02,975 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:16:02,976 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:15:54" (3/4) ... [2024-11-14 04:16:02,979 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 04:16:02,998 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 119 nodes and edges [2024-11-14 04:16:02,999 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-14 04:16:03,001 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-14 04:16:03,002 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 04:16:03,188 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:16:03,189 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 04:16:03,189 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:16:03,191 INFO L158 Benchmark]: Toolchain (without parser) took 11172.77ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 117.4MB in the beginning and 128.7MB in the end (delta: -11.3MB). Peak memory consumption was 64.7MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,192 INFO L158 Benchmark]: CDTParser took 1.11ms. Allocated memory is still 142.6MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:16:03,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.86ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 90.6MB in the end (delta: 26.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.94ms. Allocated memory is still 142.6MB. Free memory was 90.3MB in the beginning and 85.1MB in the end (delta: 5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,193 INFO L158 Benchmark]: Boogie Preprocessor took 51.98ms. Allocated memory is still 142.6MB. Free memory was 85.1MB in the beginning and 81.0MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:16:03,194 INFO L158 Benchmark]: RCFGBuilder took 2172.61ms. Allocated memory is still 142.6MB. Free memory was 81.0MB in the beginning and 74.0MB in the end (delta: 7.0MB). Peak memory consumption was 52.5MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,195 INFO L158 Benchmark]: TraceAbstraction took 8037.60ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 73.2MB in the beginning and 140.6MB in the end (delta: -67.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,195 INFO L158 Benchmark]: Witness Printer took 214.01ms. Allocated memory is still 218.1MB. Free memory was 140.6MB in the beginning and 128.7MB in the end (delta: 11.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:16:03,198 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11ms. Allocated memory is still 142.6MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.86ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 90.6MB in the end (delta: 26.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 100.94ms. Allocated memory is still 142.6MB. Free memory was 90.3MB in the beginning and 85.1MB in the end (delta: 5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.98ms. Allocated memory is still 142.6MB. Free memory was 85.1MB in the beginning and 81.0MB in the end (delta: 4.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2172.61ms. Allocated memory is still 142.6MB. Free memory was 81.0MB in the beginning and 74.0MB in the end (delta: 7.0MB). Peak memory consumption was 52.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8037.60ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 73.2MB in the beginning and 140.6MB in the end (delta: -67.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Witness Printer took 214.01ms. Allocated memory is still 218.1MB. Free memory was 140.6MB in the beginning and 128.7MB in the end (delta: 11.9MB). 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: 522]: 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, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 6, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 291 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 291 mSDsluCounter, 314 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 23 mSDsCounter, 377 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1254 IncrementalHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 377 mSolverCounterUnsat, 291 mSDtfsCounter, 1254 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=500occurred in iteration=4, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 355 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 762 NumberOfCodeBlocks, 762 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 1602 SizeOfPredicates, 0 NumberOfNonLiveVariables, 639 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 307/313 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: 593]: Loop Invariant Derived loop invariant: ((((a21 < 1) || ((a21 == 1) && (a16 <= 5))) || ((a21 == 1) && (15 <= a8))) || ((a21 == 1) && (a20 == 1))) RESULT: Ultimate proved your program to be correct! [2024-11-14 04:16:03,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c6f902-eda2-42d6-a51a-552cc01edd1f/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