./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:16:19,969 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:16:20,076 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:16:20,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:16:20,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:16:20,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:16:20,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:16:20,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:16:20,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:16:20,134 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:16:20,134 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:16:20,135 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:16:20,135 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:16:20,135 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:16:20,137 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:16:20,137 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:16:20,137 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:16:20,137 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:16:20,137 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:16:20,138 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:16:20,138 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:16:20,138 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:16:20,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:16:20,138 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:16:20,139 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:16:20,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:20,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:16:20,140 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:16:20,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:16:20,141 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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/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 -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2024-11-14 04:16:20,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:16:20,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:16:20,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:16:20,576 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:16:20,578 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:16:20,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i Unable to find full path for "g++" [2024-11-14 04:16:22,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:16:23,133 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:16:23,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2024-11-14 04:16:23,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/data/119e98309/7a4fd9688a6643068202fe7d8eeba31b/FLAGb5b1cd5f5 [2024-11-14 04:16:23,171 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/data/119e98309/7a4fd9688a6643068202fe7d8eeba31b [2024-11-14 04:16:23,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:16:23,178 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:16:23,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:23,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:16:23,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:16:23,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eef7fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23, skipping insertion in model container [2024-11-14 04:16:23,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:16:23,408 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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2024-11-14 04:16:23,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:23,448 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:16:23,463 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_0daf43c9-1b1e-43c0-a99b-8dda554af79f/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2024-11-14 04:16:23,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:23,499 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:16:23,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23 WrapperNode [2024-11-14 04:16:23,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:23,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:23,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:16:23,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:16:23,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,544 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2024-11-14 04:16:23,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:23,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:16:23,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:16:23,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:16:23,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:16:23,584 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:16:23,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:16:23,587 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:16:23,588 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (1/1) ... [2024-11-14 04:16:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:23,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:23,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:16:23,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:16:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:16:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:16:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:16:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:16:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:16:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:16:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:16:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:16:23,785 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:16:23,787 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:16:23,980 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-14 04:16:23,980 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:16:24,022 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:16:24,026 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:16:24,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:24 BoogieIcfgContainer [2024-11-14 04:16:24,027 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:16:24,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:16:24,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:16:24,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:16:24,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:16:23" (1/3) ... [2024-11-14 04:16:24,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5f24cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:24, skipping insertion in model container [2024-11-14 04:16:24,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:23" (2/3) ... [2024-11-14 04:16:24,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5f24cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:24, skipping insertion in model container [2024-11-14 04:16:24,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:24" (3/3) ... [2024-11-14 04:16:24,044 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2024-11-14 04:16:24,065 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:16:24,070 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_sentinel-2.i that has 1 procedures, 12 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:16:24,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:16:24,168 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;@56fc4048, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:16:24,168 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:16:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:16:24,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:24,184 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:24,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:24,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash -508869807, now seen corresponding path program 1 times [2024-11-14 04:16:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:24,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526534705] [2024-11-14 04:16:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,516 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 04:16:24,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:24,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526534705] [2024-11-14 04:16:24,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526534705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:24,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866014543] [2024-11-14 04:16:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:24,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:24,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:24,559 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 04:16:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:24,614 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-14 04:16:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:24,619 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 04:16:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:24,628 INFO L225 Difference]: With dead ends: 23 [2024-11-14 04:16:24,628 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 04:16:24,635 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 04:16:24,639 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:24,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:16:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 04:16:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-14 04:16:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 04:16:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-14 04:16:24,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2024-11-14 04:16:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:24,680 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-14 04:16:24,680 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 04:16:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-14 04:16:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:16:24,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:24,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:24,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:16:24,685 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:24,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1093150726, now seen corresponding path program 1 times [2024-11-14 04:16:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983749287] [2024-11-14 04:16:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,830 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 04:16:24,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983749287] [2024-11-14 04:16:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983749287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707363976] [2024-11-14 04:16:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:24,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:24,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:16:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:24,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:16:24,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:25,004 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 04:16:25,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:25,052 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 04:16:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707363976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961023840] [2024-11-14 04:16:25,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:25,082 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:25,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:25,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:25,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:25,706 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1961023840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2024-11-14 04:16:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556103939] [2024-11-14 04:16:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:26,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:16:26,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:16:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:16:26,169 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:26,295 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2024-11-14 04:16:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:16:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2024-11-14 04:16:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:26,296 INFO L225 Difference]: With dead ends: 16 [2024-11-14 04:16:26,296 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 04:16:26,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:16:26,297 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:26,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 04:16:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-14 04:16:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-14 04:16:26,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2024-11-14 04:16:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:26,311 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-14 04:16:26,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-14 04:16:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:16:26,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:26,312 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:26,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:16:26,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:26,513 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:26,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1700465087, now seen corresponding path program 1 times [2024-11-14 04:16:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:26,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991509095] [2024-11-14 04:16:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:16:26,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991509095] [2024-11-14 04:16:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991509095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818088303] [2024-11-14 04:16:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:26,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:26,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:26,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:26,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:16:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:26,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:16:26,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:16:26,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:16:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818088303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849076328] [2024-11-14 04:16:26,824 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:26,825 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:26,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:26,829 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:26,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:27,227 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:27,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_22| Int)) (and (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_22| 4)) 2147483648)) (<= 1 |v_ULTIMATE.start_main_~i~1#1_22|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_22| 4)) 2147483647))))' at error location [2024-11-14 04:16:27,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:27,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 04:16:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236190077] [2024-11-14 04:16:27,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:16:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:16:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:16:27,611 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 04:16:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,639 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-14 04:16:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:16:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) Word has length 11 [2024-11-14 04:16:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,640 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:16:27,641 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 04:16:27,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:16:27,642 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:16:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 04:16:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 04:16:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-14 04:16:27,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2024-11-14 04:16:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,650 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-14 04:16:27,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 04:16:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-14 04:16:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:16:27,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,651 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:16:27,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:27,852 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:27,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 393858539, now seen corresponding path program 2 times [2024-11-14 04:16:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103357833] [2024-11-14 04:16:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:16:28,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103357833] [2024-11-14 04:16:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103357833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:28,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995008085] [2024-11-14 04:16:28,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:16:28,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:28,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:28,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:28,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:16:28,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:16:28,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:28,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:16:28,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:28,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:16:28,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:28,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-14 04:16:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:16:28,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:16:28,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995008085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651784231] [2024-11-14 04:16:28,563 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:28,565 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:28,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:28,565 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:28,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:28,925 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:29,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_30| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_30|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_30| 4)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_30| 4)) 2147483647))))' at error location [2024-11-14 04:16:29,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:29,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:29,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-14 04:16:29,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771076152] [2024-11-14 04:16:29,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:29,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:16:29,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:16:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:16:29,423 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:29,651 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-14 04:16:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:16:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 14 [2024-11-14 04:16:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:29,652 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:16:29,653 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 04:16:29,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:16:29,654 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:29,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 04:16:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 04:16:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 04:16:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-14 04:16:29,662 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2024-11-14 04:16:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:29,662 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-14 04:16:29,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-14 04:16:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:16:29,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:29,664 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:29,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:16:29,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:29,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:29,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1964246263, now seen corresponding path program 3 times [2024-11-14 04:16:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:29,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459295312] [2024-11-14 04:16:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:30,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459295312] [2024-11-14 04:16:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459295312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15760378] [2024-11-14 04:16:30,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:16:30,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:30,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:30,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:30,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:16:30,231 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:16:30,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:30,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:16:30,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:30,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:30,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15760378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:30,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865259792] [2024-11-14 04:16:30,407 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:30,407 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:30,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:30,408 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:30,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:30,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:31,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '588#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_38| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_38| 4)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_38|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_38| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:16:31,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:31,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-14 04:16:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330599019] [2024-11-14 04:16:31,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:31,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:16:31,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:16:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:16:31,057 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:31,096 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-11-14 04:16:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:16:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 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 19 [2024-11-14 04:16:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:31,097 INFO L225 Difference]: With dead ends: 40 [2024-11-14 04:16:31,097 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:16:31,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:16:31,099 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:31,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:16:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:16:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:16:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-14 04:16:31,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2024-11-14 04:16:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:31,108 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-14 04:16:31,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-14 04:16:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:16:31,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:31,109 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:31,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:31,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:31,310 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:31,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2144278561, now seen corresponding path program 4 times [2024-11-14 04:16:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644883351] [2024-11-14 04:16:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:31,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:31,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644883351] [2024-11-14 04:16:31,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644883351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:31,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284834188] [2024-11-14 04:16:31,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:16:31,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:31,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:31,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:16:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:31,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:16:31,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:31,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:32,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284834188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:32,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724422158] [2024-11-14 04:16:32,378 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:32,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:32,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:32,379 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:32,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:32,612 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:32,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_46| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_46|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) 2147483647))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:16:32,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:32,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:32,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-14 04:16:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470621668] [2024-11-14 04:16:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:32,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:16:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:16:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:16:32,960 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:33,035 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2024-11-14 04:16:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:16:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 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 26 [2024-11-14 04:16:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:33,040 INFO L225 Difference]: With dead ends: 54 [2024-11-14 04:16:33,040 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 04:16:33,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:16:33,042 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:33,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 04:16:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-14 04:16:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-11-14 04:16:33,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2024-11-14 04:16:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:33,067 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-11-14 04:16:33,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-11-14 04:16:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 04:16:33,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:33,069 INFO L215 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:33,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:33,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:33,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:33,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -329825439, now seen corresponding path program 5 times [2024-11-14 04:16:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:33,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677070457] [2024-11-14 04:16:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:34,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677070457] [2024-11-14 04:16:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677070457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944970377] [2024-11-14 04:16:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:16:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:34,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:34,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:16:34,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:16:34,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:34,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:16:34,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:34,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:16:35,048 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2024-11-14 04:16:35,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 47 [2024-11-14 04:16:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 04:16:35,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 04:16:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944970377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:36,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010649458] [2024-11-14 04:16:36,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:36,029 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:36,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:36,030 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:36,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:36,282 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:36,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1325#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_58| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_58|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_58| 4)) 2147483647) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_58| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:16:36,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:36,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:36,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10, 10] total 44 [2024-11-14 04:16:36,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854465883] [2024-11-14 04:16:36,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:36,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:16:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:16:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:16:36,915 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:37,997 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-14 04:16:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:16:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 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 40 [2024-11-14 04:16:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:37,999 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:16:38,001 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 04:16:38,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:16:38,005 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:38,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:16:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 04:16:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-14 04:16:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-11-14 04:16:38,020 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2024-11-14 04:16:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:38,020 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-11-14 04:16:38,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-11-14 04:16:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 04:16:38,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:38,022 INFO L215 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:38,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:16:38,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:38,222 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:38,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -455754205, now seen corresponding path program 6 times [2024-11-14 04:16:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139351626] [2024-11-14 04:16:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:39,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139351626] [2024-11-14 04:16:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139351626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539216022] [2024-11-14 04:16:39,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:16:39,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:39,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:39,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:16:39,583 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:16:39,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:39,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:16:39,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:39,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539216022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653861572] [2024-11-14 04:16:41,093 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:41,093 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:41,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:41,093 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:41,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:41,280 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:41,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1885#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_70| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_70| 4)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_70|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_70| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:16:41,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:41,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:41,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2024-11-14 04:16:41,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164776264] [2024-11-14 04:16:41,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:41,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 04:16:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 04:16:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1729, Invalid=2561, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 04:16:41,733 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:41,893 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2024-11-14 04:16:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 04:16:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 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 49 [2024-11-14 04:16:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:41,894 INFO L225 Difference]: With dead ends: 100 [2024-11-14 04:16:41,894 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 04:16:41,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1729, Invalid=2561, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 04:16:41,897 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:41,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 04:16:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-14 04:16:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2024-11-14 04:16:41,918 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 49 [2024-11-14 04:16:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:41,918 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2024-11-14 04:16:41,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2024-11-14 04:16:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 04:16:41,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:41,921 INFO L215 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:41,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:16:42,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:16:42,125 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:42,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 940683789, now seen corresponding path program 7 times [2024-11-14 04:16:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:42,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423405731] [2024-11-14 04:16:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:42,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:45,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:45,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423405731] [2024-11-14 04:16:45,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423405731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:45,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566872878] [2024-11-14 04:16:45,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:16:45,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:45,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:45,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:45,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:16:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 04:16:45,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:46,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:16:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566872878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473666325] [2024-11-14 04:16:51,012 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:16:51,013 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:51,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:51,013 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:51,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:51,189 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:51,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2788#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_82| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_82| 4)) 2147483647) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_82| 4)) 2147483648)) (<= 1 |v_ULTIMATE.start_main_~i~1#1_82|))))' at error location [2024-11-14 04:16:51,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:51,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:51,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2024-11-14 04:16:51,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416866022] [2024-11-14 04:16:51,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:51,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-14 04:16:51,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-14 04:16:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6804, Invalid=8448, Unknown=0, NotChecked=0, Total=15252 [2024-11-14 04:16:51,789 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:52,107 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2024-11-14 04:16:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-14 04:16:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 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 78 [2024-11-14 04:16:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:52,111 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:16:52,111 INFO L226 Difference]: Without dead ends: 137 [2024-11-14 04:16:52,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6804, Invalid=8448, Unknown=0, NotChecked=0, Total=15252 [2024-11-14 04:16:52,115 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:52,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-14 04:16:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-14 04:16:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2024-11-14 04:16:52,146 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 78 [2024-11-14 04:16:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:52,146 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2024-11-14 04:16:52,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2024-11-14 04:16:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 04:16:52,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:52,152 INFO L215 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:52,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:16:52,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:52,353 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:52,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:52,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1920391629, now seen corresponding path program 8 times [2024-11-14 04:16:52,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:52,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550098218] [2024-11-14 04:16:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:52,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:17:03,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550098218] [2024-11-14 04:17:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550098218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924821309] [2024-11-14 04:17:03,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:03,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:03,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:03,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:03,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:17:04,475 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:17:04,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:04,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 04:17:04,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:04,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:17:06,627 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2024-11-14 04:17:06,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 63 [2024-11-14 04:17:07,014 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-14 04:17:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 6328 trivial. 0 not checked. [2024-11-14 04:17:07,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:09,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 97 [2024-11-14 04:17:09,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:09,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 1 [2024-11-14 04:17:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2024-11-14 04:17:09,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924821309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:09,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969840625] [2024-11-14 04:17:09,913 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:17:09,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:09,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:09,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:09,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:10,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:11,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4305#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_102| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_102|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_102|)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_102|)) 2147483647))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:17:11,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:11,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:11,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 20, 18] total 151 [2024-11-14 04:17:11,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342324115] [2024-11-14 04:17:11,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:11,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2024-11-14 04:17:11,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2024-11-14 04:17:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7278, Invalid=17528, Unknown=0, NotChecked=0, Total=24806 [2024-11-14 04:17:11,312 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 151 states, 151 states have (on average 1.1125827814569536) internal successors, (168), 151 states have internal predecessors, (168), 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 04:17:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:26,173 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2024-11-14 04:17:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-11-14 04:17:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.1125827814569536) internal successors, (168), 151 states have internal predecessors, (168), 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 136 [2024-11-14 04:17:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:26,176 INFO L225 Difference]: With dead ends: 178 [2024-11-14 04:17:26,176 INFO L226 Difference]: Without dead ends: 154 [2024-11-14 04:17:26,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15550 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=21014, Invalid=62218, Unknown=0, NotChecked=0, Total=83232 [2024-11-14 04:17:26,187 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:26,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:17:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-14 04:17:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-11-14 04:17:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 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 04:17:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2024-11-14 04:17:26,223 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 136 [2024-11-14 04:17:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:26,224 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2024-11-14 04:17:26,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.1125827814569536) internal successors, (168), 151 states have internal predecessors, (168), 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 04:17:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2024-11-14 04:17:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-14 04:17:26,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:26,226 INFO L215 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:26,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:17:26,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:17:26,427 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:26,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1926443003, now seen corresponding path program 9 times [2024-11-14 04:17:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277845583] [2024-11-14 04:17:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:26,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:17:36,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277845583] [2024-11-14 04:17:36,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277845583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643684761] [2024-11-14 04:17:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:17:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:36,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:36,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:17:37,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:17:37,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:37,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-14 04:17:37,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:17:37,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:17:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643684761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20945036] [2024-11-14 04:17:57,284 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:17:57,284 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:57,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:57,285 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:57,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:57,404 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:58,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6325#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_122| Int)) (and (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_122|)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_122|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_122|))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:17:58,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:58,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:58,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2024-11-14 04:17:58,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426744183] [2024-11-14 04:17:58,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:58,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2024-11-14 04:17:58,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2024-11-14 04:17:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27513, Invalid=30809, Unknown=0, NotChecked=0, Total=58322 [2024-11-14 04:17:58,332 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 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 04:17:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:59,430 INFO L93 Difference]: Finished difference Result 308 states and 426 transitions. [2024-11-14 04:17:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-14 04:17:59,431 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 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 153 [2024-11-14 04:17:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:59,434 INFO L225 Difference]: With dead ends: 308 [2024-11-14 04:17:59,434 INFO L226 Difference]: Without dead ends: 271 [2024-11-14 04:17:59,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=27513, Invalid=30809, Unknown=0, NotChecked=0, Total=58322 [2024-11-14 04:17:59,438 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:59,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-14 04:17:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2024-11-14 04:17:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 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 04:17:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2024-11-14 04:17:59,559 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 153 [2024-11-14 04:17:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:59,560 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2024-11-14 04:17:59,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 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 04:17:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2024-11-14 04:17:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-14 04:17:59,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:59,566 INFO L215 NwaCegarLoop]: trace histogram [232, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:59,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:17:59,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:17:59,771 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:59,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1963809509, now seen corresponding path program 10 times [2024-11-14 04:17:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646174701] [2024-11-14 04:17:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:59,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:18:39,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:39,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646174701] [2024-11-14 04:18:39,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646174701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48294694] [2024-11-14 04:18:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:18:39,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:39,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:39,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:39,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:18:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:40,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 2218 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-11-14 04:18:40,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:18:40,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:20:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48294694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1757655455] [2024-11-14 04:20:02,156 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:20:02,156 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:02,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:02,156 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:02,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:02,297 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:03,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9508#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_142| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_142|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_142|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_142|)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:20:03,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:03,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:03,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2024-11-14 04:20:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889262037] [2024-11-14 04:20:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:03,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2024-11-14 04:20:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2024-11-14 04:20:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109764, Invalid=116336, Unknown=0, NotChecked=0, Total=226100 [2024-11-14 04:20:03,839 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 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 04:20:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:09,705 INFO L93 Difference]: Finished difference Result 542 states and 777 transitions. [2024-11-14 04:20:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-14 04:20:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 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 270 [2024-11-14 04:20:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:09,708 INFO L225 Difference]: With dead ends: 542 [2024-11-14 04:20:09,708 INFO L226 Difference]: Without dead ends: 505 [2024-11-14 04:20:09,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5829 ImplicationChecksByTransitivity, 108.4s TimeCoverageRelationStatistics Valid=109764, Invalid=116336, Unknown=0, NotChecked=0, Total=226100 [2024-11-14 04:20:09,715 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:09,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:20:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-14 04:20:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2024-11-14 04:20:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.003968253968254) internal successors, (506), 504 states have internal predecessors, (506), 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 04:20:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2024-11-14 04:20:09,784 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 270 [2024-11-14 04:20:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:09,785 INFO L471 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2024-11-14 04:20:09,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 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 04:20:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2024-11-14 04:20:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2024-11-14 04:20:09,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:09,796 INFO L215 NwaCegarLoop]: trace histogram [466, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:09,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:20:09,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 04:20:09,997 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:09,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1313770331, now seen corresponding path program 11 times [2024-11-14 04:20:09,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:09,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401076050] [2024-11-14 04:20:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 04:22:53,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401076050] [2024-11-14 04:22:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401076050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111456417] [2024-11-14 04:22:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:22:53,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:53,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:53,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:53,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:23:02,948 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 04:23:02,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:23:02,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-14 04:23:02,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:03,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:23:20,091 INFO L349 Elim1Store]: treesize reduction 56, result has 53.7 percent of original size [2024-11-14 04:23:20,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 105 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 127 [2024-11-14 04:23:21,634 WARN L672 sPolynomialRelations]: Constructing 32768(two to the power of 15 dual juncts. [2024-11-14 04:23:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 105570 trivial. 0 not checked. [2024-11-14 04:23:23,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:23:45,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2024-11-14 04:23:45,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:45,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 224 treesize of output 1 [2024-11-14 04:23:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2024-11-14 04:23:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111456417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:23:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569009571] [2024-11-14 04:23:45,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:23:45,082 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:23:45,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:23:45,082 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:23:45,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:45,200 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:23:49,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15102#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_178| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_178|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_178|) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_178|)))))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:23:49,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:23:49,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:23:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 41, 34] total 540 [2024-11-14 04:23:49,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997565469] [2024-11-14 04:23:49,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:23:49,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 540 states [2024-11-14 04:23:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:23:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 540 interpolants. [2024-11-14 04:23:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113888, Invalid=184774, Unknown=0, NotChecked=0, Total=298662 [2024-11-14 04:23:49,303 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand has 540 states, 540 states have (on average 1.0314814814814814) internal successors, (557), 540 states have internal predecessors, (557), 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 04:27:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:27:08,406 INFO L93 Difference]: Finished difference Result 578 states and 596 transitions. [2024-11-14 04:27:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 533 states. [2024-11-14 04:27:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 540 states, 540 states have (on average 1.0314814814814814) internal successors, (557), 540 states have internal predecessors, (557), 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 504 [2024-11-14 04:27:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:27:08,412 INFO L225 Difference]: With dead ends: 578 [2024-11-14 04:27:08,413 INFO L226 Difference]: Without dead ends: 538 [2024-11-14 04:27:08,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2472 GetRequests, 1432 SyntacticMatches, 1 SemanticMatches, 1039 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175998 ImplicationChecksByTransitivity, 342.0s TimeCoverageRelationStatistics Valid=331642, Invalid=750998, Unknown=0, NotChecked=0, Total=1082640 [2024-11-14 04:27:08,467 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 181 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:27:08,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 94 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 04:27:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2024-11-14 04:27:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2024-11-14 04:27:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.0037243947858474) internal successors, (539), 537 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 539 transitions. [2024-11-14 04:27:08,549 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 539 transitions. Word has length 504 [2024-11-14 04:27:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:27:08,550 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 539 transitions. [2024-11-14 04:27:08,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 540 states, 540 states have (on average 1.0314814814814814) internal successors, (557), 540 states have internal predecessors, (557), 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 04:27:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 539 transitions. [2024-11-14 04:27:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2024-11-14 04:27:08,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:27:08,563 INFO L215 NwaCegarLoop]: trace histogram [467, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:27:08,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:27:08,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:27:08,764 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:27:08,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:27:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash -563195477, now seen corresponding path program 12 times [2024-11-14 04:27:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:27:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870196484] [2024-11-14 04:27:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:27:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2024-11-14 04:29:55,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870196484] [2024-11-14 04:29:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870196484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276160197] [2024-11-14 04:29:55,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:29:55,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:55,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:55,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daf43c9-1b1e-43c0-a99b-8dda554af79f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:29:57,330 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:29:57,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:29:57,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 4413 conjuncts, 469 conjuncts are in the unsatisfiable core [2024-11-14 04:29:57,389 INFO L278 TraceCheckSpWp]: Computing forward predicates...