./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/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 f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:30:55,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:30:55,311 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:30:55,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:30:55,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:30:55,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:30:55,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:30:55,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:30:55,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:30:55,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:30:55,361 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:30:55,361 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:30:55,361 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:30:55,362 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:30:55,362 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:30:55,362 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:30:55,364 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:30:55,364 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:30:55,364 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:30:55,364 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:30:55,365 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:30:55,365 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:30:55,365 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:30:55,365 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:30:55,365 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:30:55,366 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:30:55,367 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:30:55,367 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:30:55,367 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:30:55,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:30:55,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:30:55,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:30:55,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:30:55,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:30:55,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:30:55,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:30:55,369 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:30:55,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:30:55,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:30:55,370 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:30:55,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:30:55,370 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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/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 -> f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 [2024-11-14 04:30:55,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:30:55,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:30:55,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:30:55,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:30:55,737 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:30:55,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c Unable to find full path for "g++" [2024-11-14 04:30:57,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:30:58,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:30:58,024 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2024-11-14 04:30:58,064 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/data/8ac7a8438/5a2c8a03a7ff44929c8dc415200c2812/FLAG1fad5beb2 [2024-11-14 04:30:58,259 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/data/8ac7a8438/5a2c8a03a7ff44929c8dc415200c2812 [2024-11-14 04:30:58,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:30:58,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:30:58,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:30:58,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:30:58,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:30:58,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcb96aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58, skipping insertion in model container [2024-11-14 04:30:58,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,300 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:30:58,505 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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2024-11-14 04:30:58,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:30:58,521 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:30:58,544 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_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2024-11-14 04:30:58,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:30:58,560 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:30:58,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58 WrapperNode [2024-11-14 04:30:58,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:30:58,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:30:58,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:30:58,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:30:58,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,598 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 126 [2024-11-14 04:30:58,599 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:30:58,599 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:30:58,600 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:30:58,600 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:30:58,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:30:58,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:30:58,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:30:58,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:30:58,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (1/1) ... [2024-11-14 04:30:58,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:30:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:58,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:30:58,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:30:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:30:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:30:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:30:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:30:58,779 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:30:58,781 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:30:58,954 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2024-11-14 04:30:58,954 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:30:58,991 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:30:58,991 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 04:30:58,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:30:58 BoogieIcfgContainer [2024-11-14 04:30:58,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:30:58,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:30:58,995 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:30:59,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:30:59,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:30:58" (1/3) ... [2024-11-14 04:30:59,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13150959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:30:59, skipping insertion in model container [2024-11-14 04:30:59,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:30:58" (2/3) ... [2024-11-14 04:30:59,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13150959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:30:59, skipping insertion in model container [2024-11-14 04:30:59,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:30:58" (3/3) ... [2024-11-14 04:30:59,006 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2024-11-14 04:30:59,025 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:30:59,028 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG zonotope_3.c.p+cfa-reducer.c that has 1 procedures, 15 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 04:30:59,106 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:30:59,127 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;@9866c04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:30:59,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:30:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 04:30:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:30:59,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:59,141 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:59,142 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:59,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 532985016, now seen corresponding path program 1 times [2024-11-14 04:30:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:59,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002235284] [2024-11-14 04:30:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:59,394 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 04:30:59,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002235284] [2024-11-14 04:30:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002235284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:59,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:30:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520216586] [2024-11-14 04:30:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:59,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:30:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:30:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:30:59,427 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 04:30:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:59,477 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2024-11-14 04:30:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:30:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2024-11-14 04:30:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:59,491 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:30:59,491 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 04:30:59,495 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 04:30:59,501 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:59,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:30:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 04:30:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2024-11-14 04:30:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 04:30:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2024-11-14 04:30:59,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2024-11-14 04:30:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:59,535 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2024-11-14 04:30:59,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 04:30:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2024-11-14 04:30:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:30:59,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:59,538 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:59,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:30:59,539 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:59,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1155032636, now seen corresponding path program 1 times [2024-11-14 04:30:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:59,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456553114] [2024-11-14 04:30:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:59,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:59,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:59,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456553114] [2024-11-14 04:30:59,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456553114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:59,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:59,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:30:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385819254] [2024-11-14 04:30:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:59,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:30:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:30:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:30:59,610 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 04:30:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:59,637 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-11-14 04:30:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:30:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2024-11-14 04:30:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:59,638 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:30:59,638 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 04:30:59,638 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 04:30:59,639 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:59,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:30:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 04:30:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 04:30:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 04:30:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-14 04:30:59,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-11-14 04:30:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:59,647 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-14 04:30:59,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 04:30:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-14 04:30:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:30:59,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:59,649 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:59,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:30:59,649 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:59,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash -61253633, now seen corresponding path program 1 times [2024-11-14 04:30:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:59,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784061343] [2024-11-14 04:30:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:59,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:59,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:59,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784061343] [2024-11-14 04:30:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784061343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075931487] [2024-11-14 04:30:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:59,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:59,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:59,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:59,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:30:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:59,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:30:59,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:59,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:00,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075931487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940039279] [2024-11-14 04:31:00,080 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:00,081 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:00,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:00,091 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:00,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:00,678 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1940039279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:31:00,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2024-11-14 04:31:00,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178376849] [2024-11-14 04:31:00,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:31:00,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:31:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:31:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:31:00,973 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 04:31:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:01,110 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-14 04:31:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:31:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 11 [2024-11-14 04:31:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:01,111 INFO L225 Difference]: With dead ends: 17 [2024-11-14 04:31:01,111 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 04:31:01,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:31:01,114 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:01,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:31:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 04:31:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 04:31:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 04:31:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-14 04:31:01,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2024-11-14 04:31:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:01,120 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-14 04:31:01,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 04:31:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-14 04:31:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:31:01,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:01,121 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:01,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:31:01,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:01,322 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:01,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -44242972, now seen corresponding path program 1 times [2024-11-14 04:31:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:01,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662485195] [2024-11-14 04:31:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:01,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662485195] [2024-11-14 04:31:01,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662485195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162697607] [2024-11-14 04:31:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:01,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:01,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:01,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:31:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:01,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:31:01,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:01,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:01,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162697607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:01,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419002067] [2024-11-14 04:31:01,577 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:01,581 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:01,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:01,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:01,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:01,887 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:02,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '282#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:02,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:02,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:02,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 04:31:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467933163] [2024-11-14 04:31:02,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:02,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:31:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:31:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:31:02,123 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 04:31:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:02,148 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-14 04:31:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:31:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 11 [2024-11-14 04:31:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:02,151 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:31:02,152 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:31:02,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:31:02,153 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:02,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:31:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:31:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 04:31:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 04:31:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-14 04:31:02,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 11 [2024-11-14 04:31:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:02,160 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-14 04:31:02,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 04:31:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-14 04:31:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:31:02,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:02,162 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:02,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:02,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:02,363 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:02,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1495002297, now seen corresponding path program 2 times [2024-11-14 04:31:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227328221] [2024-11-14 04:31:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227328221] [2024-11-14 04:31:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227328221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391443959] [2024-11-14 04:31:02,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:02,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:02,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:02,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:31:02,692 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:31:02,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:02,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:31:02,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:02,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:02,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391443959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:02,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885965858] [2024-11-14 04:31:02,860 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:02,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:02,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:02,861 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:02,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:03,091 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:03,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:03,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:03,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:03,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-14 04:31:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099704628] [2024-11-14 04:31:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:03,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:31:03,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:03,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:31:03,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:31:03,375 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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 04:31:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:03,440 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-11-14 04:31:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:31:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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 23 [2024-11-14 04:31:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:03,442 INFO L225 Difference]: With dead ends: 56 [2024-11-14 04:31:03,442 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 04:31:03,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:31:03,445 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:03,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:31:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 04:31:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 04:31:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 04:31:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-14 04:31:03,455 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 23 [2024-11-14 04:31:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:03,455 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-14 04:31:03,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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 04:31:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-14 04:31:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:31:03,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:03,457 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:03,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:03,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:03,661 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:03,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 429682659, now seen corresponding path program 3 times [2024-11-14 04:31:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:03,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412783005] [2024-11-14 04:31:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:03,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:04,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:04,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412783005] [2024-11-14 04:31:04,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412783005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:04,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790737189] [2024-11-14 04:31:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:31:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:04,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:04,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:31:04,262 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:31:04,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:04,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:31:04,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:04,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790737189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:04,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436338676] [2024-11-14 04:31:04,695 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:04,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:04,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:04,696 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:04,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:04,869 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:05,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '902#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:05,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:05,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:05,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-14 04:31:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482337696] [2024-11-14 04:31:05,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:05,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:31:05,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:31:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:31:05,127 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 04:31:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:05,229 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2024-11-14 04:31:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:31:05,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 47 [2024-11-14 04:31:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:05,231 INFO L225 Difference]: With dead ends: 104 [2024-11-14 04:31:05,231 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 04:31:05,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:31:05,233 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:05,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 87 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:31:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 04:31:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-14 04:31:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 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 04:31:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-11-14 04:31:05,241 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 47 [2024-11-14 04:31:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:05,241 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-11-14 04:31:05,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 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 04:31:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-11-14 04:31:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 04:31:05,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:05,243 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:05,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:31:05,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:31:05,444 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:05,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -665691081, now seen corresponding path program 4 times [2024-11-14 04:31:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179209412] [2024-11-14 04:31:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:06,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179209412] [2024-11-14 04:31:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179209412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238217055] [2024-11-14 04:31:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:31:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:06,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:06,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:31:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:06,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:31:06,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:07,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238217055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123132220] [2024-11-14 04:31:08,245 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:08,246 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:08,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:08,246 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:08,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:08,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:08,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1722#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:08,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:08,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-14 04:31:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425889528] [2024-11-14 04:31:08,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:08,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:31:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:08,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:31:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=1775, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:31:08,652 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 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 04:31:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:08,889 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2024-11-14 04:31:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:31:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 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 95 [2024-11-14 04:31:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:08,897 INFO L225 Difference]: With dead ends: 200 [2024-11-14 04:31:08,897 INFO L226 Difference]: Without dead ends: 193 [2024-11-14 04:31:08,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1195, Invalid=1775, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:31:08,899 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:08,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:31:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-14 04:31:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-11-14 04:31:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 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 04:31:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2024-11-14 04:31:08,921 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 95 [2024-11-14 04:31:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:08,921 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2024-11-14 04:31:08,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 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 04:31:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2024-11-14 04:31:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-14 04:31:08,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:08,924 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:08,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:09,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:09,128 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:09,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 988400863, now seen corresponding path program 5 times [2024-11-14 04:31:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860280092] [2024-11-14 04:31:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:12,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860280092] [2024-11-14 04:31:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860280092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596444380] [2024-11-14 04:31:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:12,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:12,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:12,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:31:12,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2024-11-14 04:31:12,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:12,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 04:31:12,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:13,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:16,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596444380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:16,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210267927] [2024-11-14 04:31:16,190 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:16,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:16,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:16,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:16,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:16,324 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:16,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3358#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:16,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:16,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:16,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2024-11-14 04:31:16,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799548690] [2024-11-14 04:31:16,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:16,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 04:31:16,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 04:31:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4675, Invalid=5831, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:31:16,620 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 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 04:31:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:17,076 INFO L93 Difference]: Finished difference Result 392 states and 441 transitions. [2024-11-14 04:31:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-14 04:31:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 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 191 [2024-11-14 04:31:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:17,079 INFO L225 Difference]: With dead ends: 392 [2024-11-14 04:31:17,079 INFO L226 Difference]: Without dead ends: 385 [2024-11-14 04:31:17,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4675, Invalid=5831, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:31:17,082 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:17,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 245 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:31:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-14 04:31:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2024-11-14 04:31:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 384 states have internal predecessors, (386), 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 04:31:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2024-11-14 04:31:17,100 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 191 [2024-11-14 04:31:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:17,100 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2024-11-14 04:31:17,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 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 04:31:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2024-11-14 04:31:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2024-11-14 04:31:17,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:17,106 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:17,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:31:17,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:17,307 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:17,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 394726959, now seen corresponding path program 6 times [2024-11-14 04:31:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:17,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110786143] [2024-11-14 04:31:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:25,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110786143] [2024-11-14 04:31:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110786143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58201935] [2024-11-14 04:31:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:31:25,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:25,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:25,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:31:26,863 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:31:26,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:26,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-14 04:31:26,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:27,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58201935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1698974609] [2024-11-14 04:31:39,525 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:31:39,525 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:39,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:39,526 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:39,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:39,654 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:40,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6626#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:31:40,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:40,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2024-11-14 04:31:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967201269] [2024-11-14 04:31:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:40,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-14 04:31:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-14 04:31:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18547, Invalid=20855, Unknown=0, NotChecked=0, Total=39402 [2024-11-14 04:31:40,136 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 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 04:31:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:41,599 INFO L93 Difference]: Finished difference Result 776 states and 873 transitions. [2024-11-14 04:31:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-14 04:31:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 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 383 [2024-11-14 04:31:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:41,604 INFO L225 Difference]: With dead ends: 776 [2024-11-14 04:31:41,604 INFO L226 Difference]: Without dead ends: 769 [2024-11-14 04:31:41,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=18547, Invalid=20855, Unknown=0, NotChecked=0, Total=39402 [2024-11-14 04:31:41,607 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:41,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 418 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:31:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-11-14 04:31:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-11-14 04:31:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 768 states have internal predecessors, (770), 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 04:31:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 770 transitions. [2024-11-14 04:31:41,657 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 770 transitions. Word has length 383 [2024-11-14 04:31:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:41,658 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 770 transitions. [2024-11-14 04:31:41,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 192 states have internal predecessors, (766), 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 04:31:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 770 transitions. [2024-11-14 04:31:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2024-11-14 04:31:41,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:41,679 INFO L215 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:41,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:31:41,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:31:41,883 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:41,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1148915919, now seen corresponding path program 7 times [2024-11-14 04:31:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:41,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298227456] [2024-11-14 04:31:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:41,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:14,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298227456] [2024-11-14 04:32:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298227456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734685651] [2024-11-14 04:32:14,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:32:14,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:14,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:14,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:32:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:16,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 6126 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-14 04:32:16,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:18,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:33:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734685651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:04,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714463770] [2024-11-14 04:33:04,671 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:33:04,671 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:04,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:04,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:04,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:04,790 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:05,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13158#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:33:05,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:05,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:05,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2024-11-14 04:33:05,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516215886] [2024-11-14 04:33:05,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:05,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-14 04:33:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-14 04:33:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73939, Invalid=78551, Unknown=0, NotChecked=0, Total=152490 [2024-11-14 04:33:05,772 INFO L87 Difference]: Start difference. First operand 769 states and 770 transitions. Second operand has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 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 04:33:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:14,357 INFO L93 Difference]: Finished difference Result 1544 states and 1737 transitions. [2024-11-14 04:33:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-11-14 04:33:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 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 767 [2024-11-14 04:33:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:14,366 INFO L225 Difference]: With dead ends: 1544 [2024-11-14 04:33:14,366 INFO L226 Difference]: Without dead ends: 1537 [2024-11-14 04:33:14,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2491 GetRequests, 2102 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 62.8s TimeCoverageRelationStatistics Valid=73939, Invalid=78551, Unknown=0, NotChecked=0, Total=152490 [2024-11-14 04:33:14,376 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:14,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 842 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:33:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2024-11-14 04:33:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2024-11-14 04:33:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.0013020833333333) internal successors, (1538), 1536 states have internal predecessors, (1538), 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 04:33:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1538 transitions. [2024-11-14 04:33:14,408 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1538 transitions. Word has length 767 [2024-11-14 04:33:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:14,409 INFO L471 AbstractCegarLoop]: Abstraction has 1537 states and 1538 transitions. [2024-11-14 04:33:14,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 384 states have internal predecessors, (1534), 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 04:33:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1538 transitions. [2024-11-14 04:33:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1536 [2024-11-14 04:33:14,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:14,461 INFO L215 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:14,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:33:14,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:33:14,662 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:33:14,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 491329039, now seen corresponding path program 8 times [2024-11-14 04:33:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:14,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754640243] [2024-11-14 04:33:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:35:48,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:35:48,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754640243] [2024-11-14 04:35:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754640243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:35:48,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890500767] [2024-11-14 04:35:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:35:48,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:35:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:35:48,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:35:48,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:35:59,540 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2024-11-14 04:35:59,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:35:59,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 12270 conjuncts, 384 conjuncts are in the unsatisfiable core [2024-11-14 04:35:59,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:01,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:39:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890500767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:39:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973812185] [2024-11-14 04:39:27,977 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:39:27,977 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:39:27,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:39:27,978 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:39:27,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:39:28,120 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:39:30,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26218#(and (<= 1 |#StackHeapBarrier|) (= ~__return_main~0 0))' at error location [2024-11-14 04:39:30,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:39:30,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:39:30,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2024-11-14 04:39:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711784822] [2024-11-14 04:39:30,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:39:30,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2024-11-14 04:39:30,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:39:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2024-11-14 04:39:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295315, Invalid=304535, Unknown=0, NotChecked=0, Total=599850 [2024-11-14 04:39:30,201 INFO L87 Difference]: Start difference. First operand 1537 states and 1538 transitions. Second operand has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 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 04:40:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:37,485 INFO L93 Difference]: Finished difference Result 3080 states and 3465 transitions. [2024-11-14 04:40:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2024-11-14 04:40:37,488 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 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 1535 [2024-11-14 04:40:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:37,503 INFO L225 Difference]: With dead ends: 3080 [2024-11-14 04:40:37,503 INFO L226 Difference]: Without dead ends: 3073 [2024-11-14 04:40:37,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4987 GetRequests, 4214 SyntacticMatches, 0 SemanticMatches, 773 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8427 ImplicationChecksByTransitivity, 268.1s TimeCoverageRelationStatistics Valid=295315, Invalid=304535, Unknown=0, NotChecked=0, Total=599850 [2024-11-14 04:40:37,535 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:37,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1568 Invalid, 1540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 04:40:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2024-11-14 04:40:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 3073. [2024-11-14 04:40:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3072 states have (on average 1.0006510416666667) internal successors, (3074), 3072 states have internal predecessors, (3074), 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 04:40:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 3074 transitions. [2024-11-14 04:40:37,593 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 3074 transitions. Word has length 1535 [2024-11-14 04:40:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:37,595 INFO L471 AbstractCegarLoop]: Abstraction has 3073 states and 3074 transitions. [2024-11-14 04:40:37,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 3.9921976592977892) internal successors, (3070), 768 states have internal predecessors, (3070), 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 04:40:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 3074 transitions. [2024-11-14 04:40:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3072 [2024-11-14 04:40:37,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:37,650 INFO L215 NwaCegarLoop]: trace histogram [766, 766, 766, 766, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:37,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:40:37,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbcf0b-5c54-472c-84d3-a7e500ef3e8f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:40:37,851 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:37,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1249714319, now seen corresponding path program 9 times [2024-11-14 04:40:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468836019] [2024-11-14 04:40:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat