./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/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_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/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_59dde57d-7a37-4b5c-9a28-0ae41096014d/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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:38:11,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:38:11,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:38:11,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:38:11,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:38:11,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:38:11,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:38:11,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:38:11,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:38:11,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:38:11,700 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:38:11,701 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:38:11,701 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:38:11,701 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:38:11,701 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:38:11,701 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:38:11,702 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:38:11,702 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:38:11,702 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:38:11,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:38:11,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:38:11,702 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:38:11,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:38:11,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:38:11,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:38:11,704 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:38:11,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:38:11,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:38:11,705 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:38:11,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:38:11,706 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_59dde57d-7a37-4b5c-9a28-0ae41096014d/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 -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2024-11-13 23:38:12,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:38:12,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:38:12,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:38:12,056 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:38:12,057 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:38:12,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c Unable to find full path for "g++" [2024-11-13 23:38:14,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:38:14,291 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:38:14,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2024-11-13 23:38:14,305 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/data/9e27d29c2/3c227233d2104e269daba3251cc849ee/FLAG425ee6c7d [2024-11-13 23:38:14,603 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/data/9e27d29c2/3c227233d2104e269daba3251cc849ee [2024-11-13 23:38:14,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:38:14,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:38:14,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:38:14,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:38:14,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:38:14,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f322a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14, skipping insertion in model container [2024-11-13 23:38:14,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,648 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:38:14,861 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_59dde57d-7a37-4b5c-9a28-0ae41096014d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2024-11-13 23:38:14,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:38:14,901 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:38:14,913 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_59dde57d-7a37-4b5c-9a28-0ae41096014d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2024-11-13 23:38:14,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:38:14,939 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:38:14,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14 WrapperNode [2024-11-13 23:38:14,940 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:38:14,941 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:38:14,941 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:38:14,941 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:38:14,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,979 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-11-13 23:38:14,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:38:14,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:38:14,984 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:38:14,984 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:38:14,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:14,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,019 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,020 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,021 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,026 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:38:15,027 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:38:15,028 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:38:15,028 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:38:15,029 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (1/1) ... [2024-11-13 23:38:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:38:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:15,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:38:15,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:38:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:38:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:38:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:38:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:38:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:38:15,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:38:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:38:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:38:15,227 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:38:15,229 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:38:15,445 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-13 23:38:15,445 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:38:15,528 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:38:15,528 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 23:38:15,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:38:15 BoogieIcfgContainer [2024-11-13 23:38:15,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:38:15,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:38:15,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:38:15,538 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:38:15,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:38:14" (1/3) ... [2024-11-13 23:38:15,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6424e4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:38:15, skipping insertion in model container [2024-11-13 23:38:15,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:38:14" (2/3) ... [2024-11-13 23:38:15,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6424e4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:38:15, skipping insertion in model container [2024-11-13 23:38:15,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:38:15" (3/3) ... [2024-11-13 23:38:15,544 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2024-11-13 23:38:15,564 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:38:15,566 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_pair_symmetr.c that has 1 procedures, 9 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 23:38:15,637 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:38:15,651 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;@6110a0c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:38:15,653 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:38:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2024-11-13 23:38:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 23:38:15,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:15,670 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 23:38:15,671 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:15,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:15,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1627768046, now seen corresponding path program 1 times [2024-11-13 23:38:15,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:15,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568567060] [2024-11-13 23:38:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:38:16,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:16,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568567060] [2024-11-13 23:38:16,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568567060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:38:16,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:38:16,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:38:16,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156762533] [2024-11-13 23:38:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:38:16,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:38:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:38:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:38:16,046 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-13 23:38:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:16,117 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-11-13 23:38:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:38:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-13 23:38:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:16,129 INFO L225 Difference]: With dead ends: 17 [2024-11-13 23:38:16,129 INFO L226 Difference]: Without dead ends: 9 [2024-11-13 23:38:16,136 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 [2024-11-13 23:38:16,143 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:16,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:38:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-13 23:38:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-13 23:38:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2024-11-13 23:38:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-13 23:38:16,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-13 23:38:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:16,180 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-13 23:38:16,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-13 23:38:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-13 23:38:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:38:16,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:16,181 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:16,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:38:16,182 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:16,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1167185124, now seen corresponding path program 1 times [2024-11-13 23:38:16,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:16,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020086523] [2024-11-13 23:38:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:16,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020086523] [2024-11-13 23:38:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020086523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:38:16,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:38:16,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:38:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945325987] [2024-11-13 23:38:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:38:16,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:38:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:38:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:38:16,439 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2024-11-13 23:38:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:16,487 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2024-11-13 23:38:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:38:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2024-11-13 23:38:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:16,489 INFO L225 Difference]: With dead ends: 15 [2024-11-13 23:38:16,489 INFO L226 Difference]: Without dead ends: 10 [2024-11-13 23:38:16,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:38:16,491 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 7 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 [2024-11-13 23:38:16,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:38:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-13 23:38:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-13 23:38:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2024-11-13 23:38:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-13 23:38:16,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-13 23:38:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:16,497 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-13 23:38:16,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2024-11-13 23:38:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-13 23:38:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 23:38:16,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:16,498 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:16,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:38:16,498 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:16,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1792253265, now seen corresponding path program 1 times [2024-11-13 23:38:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993522824] [2024-11-13 23:38:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:16,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993522824] [2024-11-13 23:38:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993522824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597352113] [2024-11-13 23:38:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:16,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:38:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:16,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:38:16,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:16,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:16,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597352113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:16,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744535039] [2024-11-13 23:38:16,959 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:16,959 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:16,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:16,968 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:16,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:18,107 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:18,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-13 23:38:18,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:18,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-13 23:38:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217030578] [2024-11-13 23:38:18,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:18,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:38:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:38:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-13 23:38:18,324 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:18,381 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2024-11-13 23:38:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:38:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 23:38:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:18,383 INFO L225 Difference]: With dead ends: 20 [2024-11-13 23:38:18,383 INFO L226 Difference]: Without dead ends: 13 [2024-11-13 23:38:18,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-13 23:38:18,385 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:18,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:38:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-13 23:38:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-13 23:38:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-13 23:38:18,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2024-11-13 23:38:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:18,392 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-13 23:38:18,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-13 23:38:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:38:18,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:18,394 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:18,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:38:18,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:18,594 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:18,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1217636451, now seen corresponding path program 2 times [2024-11-13 23:38:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943895128] [2024-11-13 23:38:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:18,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943895128] [2024-11-13 23:38:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943895128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388120379] [2024-11-13 23:38:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:38:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:18,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:38:18,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:38:18,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:38:18,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:38:18,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:38:19,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:38:19,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388120379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:19,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883151061] [2024-11-13 23:38:19,146 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:19,147 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:19,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:19,150 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:19,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:19,500 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:19,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '273#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 4) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-13 23:38:19,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:19,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:19,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2024-11-13 23:38:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530215678] [2024-11-13 23:38:19,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:19,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 23:38:19,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 23:38:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:38:19,738 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2024-11-13 23:38:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:19,951 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2024-11-13 23:38:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:38:19,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) Word has length 11 [2024-11-13 23:38:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:19,953 INFO L225 Difference]: With dead ends: 55 [2024-11-13 23:38:19,953 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 23:38:19,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:38:19,954 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:19,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 27 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:38:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 23:38:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2024-11-13 23:38:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-11-13 23:38:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-13 23:38:19,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2024-11-13 23:38:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:19,960 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-13 23:38:19,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2024-11-13 23:38:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-13 23:38:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 23:38:19,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:19,961 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:19,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:38:20,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:20,165 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:20,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -28997839, now seen corresponding path program 3 times [2024-11-13 23:38:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340543109] [2024-11-13 23:38:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:38:20,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340543109] [2024-11-13 23:38:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340543109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816120832] [2024-11-13 23:38:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:38:20,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:20,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:20,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:38:20,789 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:38:20,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:38:20,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:38:20,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:38:20,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:38:21,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816120832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:21,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675750388] [2024-11-13 23:38:21,189 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:21,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:21,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:21,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:21,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:21,542 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:21,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '549#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-13 23:38:21,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:21,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:21,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2024-11-13 23:38:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9118187] [2024-11-13 23:38:21,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 23:38:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 23:38:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 23:38:21,697 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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) [2024-11-13 23:38:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:22,160 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2024-11-13 23:38:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 23:38:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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 20 [2024-11-13 23:38:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:22,162 INFO L225 Difference]: With dead ends: 124 [2024-11-13 23:38:22,163 INFO L226 Difference]: Without dead ends: 111 [2024-11-13 23:38:22,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=1142, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 23:38:22,166 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 256 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:22,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 63 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:38:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-13 23:38:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2024-11-13 23:38:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2024-11-13 23:38:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-11-13 23:38:22,182 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2024-11-13 23:38:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:22,182 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-11-13 23:38:22,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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) [2024-11-13 23:38:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-11-13 23:38:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 23:38:22,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:22,184 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:22,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:38:22,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:22,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:22,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1627209234, now seen corresponding path program 4 times [2024-11-13 23:38:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164217837] [2024-11-13 23:38:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-13 23:38:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164217837] [2024-11-13 23:38:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164217837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492238722] [2024-11-13 23:38:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:38:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:23,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:23,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:38:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:23,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 23:38:23,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-13 23:38:23,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-13 23:38:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492238722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527785485] [2024-11-13 23:38:24,644 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:24,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:24,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:24,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:24,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:24,949 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:25,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1103#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_159| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_159|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))) (= |ULTIMATE.start_main_~i~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-13 23:38:25,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:25,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2024-11-13 23:38:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364788360] [2024-11-13 23:38:25,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:25,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 23:38:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 23:38:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=1774, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 23:38:25,717 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2024-11-13 23:38:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:25,828 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2024-11-13 23:38:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 23:38:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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 38 [2024-11-13 23:38:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:25,829 INFO L225 Difference]: With dead ends: 80 [2024-11-13 23:38:25,829 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 23:38:25,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1418, Invalid=1774, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 23:38:25,831 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:25,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:38:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 23:38:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-13 23:38:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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) [2024-11-13 23:38:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2024-11-13 23:38:25,841 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2024-11-13 23:38:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:25,841 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2024-11-13 23:38:25,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2024-11-13 23:38:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2024-11-13 23:38:25,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 23:38:25,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:25,842 INFO L215 NwaCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:25,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 23:38:26,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 23:38:26,047 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:26,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash 416352850, now seen corresponding path program 5 times [2024-11-13 23:38:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:26,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648001872] [2024-11-13 23:38:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-13 23:38:28,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648001872] [2024-11-13 23:38:28,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648001872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:28,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278888581] [2024-11-13 23:38:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:38:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:28,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:28,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:38:35,900 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 23:38:35,900 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:38:35,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 23:38:35,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2024-11-13 23:38:36,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2024-11-13 23:38:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278888581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811089378] [2024-11-13 23:38:37,678 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:37,678 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:37,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:37,679 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:37,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:37,898 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:38,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1772#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 4) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-13 23:38:38,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:38,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:38,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2024-11-13 23:38:38,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994265491] [2024-11-13 23:38:38,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:38,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-13 23:38:38,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-13 23:38:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2610, Invalid=3242, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 23:38:38,127 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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) [2024-11-13 23:38:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:41,357 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2024-11-13 23:38:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 23:38:41,358 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 56 [2024-11-13 23:38:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:41,361 INFO L225 Difference]: With dead ends: 385 [2024-11-13 23:38:41,361 INFO L226 Difference]: Without dead ends: 363 [2024-11-13 23:38:41,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3899 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4675, Invalid=7757, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 23:38:41,365 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1296 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:41,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 180 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:38:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-13 23:38:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2024-11-13 23:38:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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) [2024-11-13 23:38:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2024-11-13 23:38:41,391 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2024-11-13 23:38:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:41,392 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2024-11-13 23:38:41,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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) [2024-11-13 23:38:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2024-11-13 23:38:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-13 23:38:41,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:41,395 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:41,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 23:38:41,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 23:38:41,596 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:41,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1979438290, now seen corresponding path program 6 times [2024-11-13 23:38:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821121899] [2024-11-13 23:38:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:41,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2024-11-13 23:38:47,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:47,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821121899] [2024-11-13 23:38:47,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821121899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:47,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320786763] [2024-11-13 23:38:47,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:38:47,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:47,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:47,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:47,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:43:09,131 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:43:09,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:09,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 23:43:09,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2024-11-13 23:43:11,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2024-11-13 23:43:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320786763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647458550] [2024-11-13 23:43:16,734 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:43:16,734 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:16,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:16,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:16,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:17,030 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:21,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3443#(and (= |ULTIMATE.start_main_~i~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)) (exists ((|v_ULTIMATE.start_main_~i~0#1_401| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_401|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))))' at error location [2024-11-13 23:43:21,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:21,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:21,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2024-11-13 23:43:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673507474] [2024-11-13 23:43:21,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:21,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2024-11-13 23:43:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:21,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2024-11-13 23:43:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12105, Invalid=15617, Unknown=0, NotChecked=0, Total=27722 [2024-11-13 23:43:21,229 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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) [2024-11-13 23:43:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:33,101 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2024-11-13 23:43:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-13 23:43:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 110 [2024-11-13 23:43:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:33,106 INFO L225 Difference]: With dead ends: 799 [2024-11-13 23:43:33,106 INFO L226 Difference]: Without dead ends: 741 [2024-11-13 23:43:33,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 164 SyntacticMatches, 53 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32533 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18094, Invalid=30086, Unknown=0, NotChecked=0, Total=48180 [2024-11-13 23:43:33,118 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2408 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:33,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2408 Valid, 399 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 23:43:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2024-11-13 23:43:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2024-11-13 23:43:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 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) [2024-11-13 23:43:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2024-11-13 23:43:33,170 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2024-11-13 23:43:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:33,171 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2024-11-13 23:43:33,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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) [2024-11-13 23:43:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2024-11-13 23:43:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-13 23:43:33,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:33,180 INFO L215 NwaCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2024-11-13 23:43:33,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:43:33,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:33,381 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:33,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1199837938, now seen corresponding path program 7 times [2024-11-13 23:43:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:33,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384489831] [2024-11-13 23:43:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2024-11-13 23:43:47,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384489831] [2024-11-13 23:43:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384489831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518234219] [2024-11-13 23:43:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:43:47,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:47,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:47,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:43:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:48,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-13 23:43:48,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2024-11-13 23:43:55,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2024-11-13 23:44:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518234219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040902917] [2024-11-13 23:44:15,875 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:44:15,875 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:15,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:15,875 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:15,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:16,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:30,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6786#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_729| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_729|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))) (= |ULTIMATE.start_main_~i~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-13 23:44:30,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:44:30,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:44:30,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2024-11-13 23:44:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551611756] [2024-11-13 23:44:30,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:44:30,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2024-11-13 23:44:30,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2024-11-13 23:44:30,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47302, Invalid=59300, Unknown=0, NotChecked=0, Total=106602 [2024-11-13 23:44:30,727 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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) [2024-11-13 23:44:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:31,802 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2024-11-13 23:44:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2024-11-13 23:44:31,803 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 218 [2024-11-13 23:44:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:31,805 INFO L225 Difference]: With dead ends: 440 [2024-11-13 23:44:31,805 INFO L226 Difference]: Without dead ends: 328 [2024-11-13 23:44:31,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 328 SyntacticMatches, 107 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105059 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=47302, Invalid=59300, Unknown=0, NotChecked=0, Total=106602 [2024-11-13 23:44:31,811 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:31,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:44:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-11-13 23:44:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2024-11-13 23:44:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 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) [2024-11-13 23:44:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2024-11-13 23:44:31,861 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2024-11-13 23:44:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:31,862 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2024-11-13 23:44:31,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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) [2024-11-13 23:44:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2024-11-13 23:44:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-13 23:44:31,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:31,869 INFO L215 NwaCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:31,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:44:32,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:32,073 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:32,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1507503218, now seen corresponding path program 8 times [2024-11-13 23:44:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:32,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81955805] [2024-11-13 23:44:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2024-11-13 23:45:14,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:14,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81955805] [2024-11-13 23:45:14,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81955805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:14,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501832678] [2024-11-13 23:45:14,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:45:14,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:14,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:14,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59dde57d-7a37-4b5c-9a28-0ae41096014d/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process