./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/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_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/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_19eec25f-dd40-4123-bb5d-60bccc4c462a/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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:45:15,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:45:15,728 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:45:15,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:45:15,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:45:15,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:45:15,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:45:15,767 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:45:15,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:45:15,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:45:15,767 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:45:15,768 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:45:15,768 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:45:15,769 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:45:15,769 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:45:15,769 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:45:15,769 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:45:15,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:45:15,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:45:15,770 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:45:15,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:45:15,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:45:15,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:45:15,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:45:15,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:45:15,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:45:15,772 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:45:15,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:45:15,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:45:15,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:45:15,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:45:15,774 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_19eec25f-dd40-4123-bb5d-60bccc4c462a/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 -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2024-11-13 23:45:16,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:45:16,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:45:16,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:45:16,145 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:45:16,145 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:45:16,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/reducercommutativity/max05-1.i Unable to find full path for "g++" [2024-11-13 23:45:18,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:45:18,845 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:45:18,846 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/sv-benchmarks/c/reducercommutativity/max05-1.i [2024-11-13 23:45:18,854 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/data/01761872b/70b4280953e049bab1f571e834d19642/FLAGc3180277f [2024-11-13 23:45:18,873 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/data/01761872b/70b4280953e049bab1f571e834d19642 [2024-11-13 23:45:18,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:45:18,878 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:45:18,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:45:18,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:45:18,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:45:18,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:45:18" (1/1) ... [2024-11-13 23:45:18,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7edd676f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:18, skipping insertion in model container [2024-11-13 23:45:18,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:45:18" (1/1) ... [2024-11-13 23:45:18,912 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:45:19,161 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_19eec25f-dd40-4123-bb5d-60bccc4c462a/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2024-11-13 23:45:19,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:45:19,179 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:45:19,210 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_19eec25f-dd40-4123-bb5d-60bccc4c462a/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2024-11-13 23:45:19,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:45:19,245 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:45:19,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19 WrapperNode [2024-11-13 23:45:19,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:45:19,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:45:19,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:45:19,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:45:19,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,288 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-13 23:45:19,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:45:19,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:45:19,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:45:19,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:45:19,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:45:19,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:45:19,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:45:19,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:45:19,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (1/1) ... [2024-11-13 23:45:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:45:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:19,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:45:19,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:45:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:45:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-13 23:45:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-13 23:45:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:45:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:45:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:45:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:45:19,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:45:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:45:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:45:19,521 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:45:19,523 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:45:19,742 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-13 23:45:19,742 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:45:19,788 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:45:19,788 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 23:45:19,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:45:19 BoogieIcfgContainer [2024-11-13 23:45:19,789 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:45:19,792 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:45:19,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:45:19,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:45:19,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:45:18" (1/3) ... [2024-11-13 23:45:19,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3150cbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:45:19, skipping insertion in model container [2024-11-13 23:45:19,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:19" (2/3) ... [2024-11-13 23:45:19,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3150cbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:45:19, skipping insertion in model container [2024-11-13 23:45:19,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:45:19" (3/3) ... [2024-11-13 23:45:19,800 INFO L112 eAbstractionObserver]: Analyzing ICFG max05-1.i [2024-11-13 23:45:19,816 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:45:19,818 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG max05-1.i that has 2 procedures, 17 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 23:45:19,878 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:45:19,891 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;@6b9b4851, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:45:19,891 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:45:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 23:45:19,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:19,905 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:19,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:19,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2138924675, now seen corresponding path program 1 times [2024-11-13 23:45:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390056775] [2024-11-13 23:45:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 23:45:20,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:20,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390056775] [2024-11-13 23:45:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390056775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:45:20,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:45:20,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:45:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651116057] [2024-11-13 23:45:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:45:20,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:45:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:45:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:45:20,255 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:45:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:20,321 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2024-11-13 23:45:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:45:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2024-11-13 23:45:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:20,330 INFO L225 Difference]: With dead ends: 33 [2024-11-13 23:45:20,330 INFO L226 Difference]: Without dead ends: 16 [2024-11-13 23:45:20,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:45:20,337 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:20,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-13 23:45:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-13 23:45:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-13 23:45:20,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2024-11-13 23:45:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:20,373 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-13 23:45:20,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:45:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-13 23:45:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:45:20,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:20,375 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:20,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:45:20,375 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:20,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1233693712, now seen corresponding path program 1 times [2024-11-13 23:45:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109145090] [2024-11-13 23:45:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 23:45:20,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109145090] [2024-11-13 23:45:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109145090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190475325] [2024-11-13 23:45:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:20,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:20,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:20,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:45:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:20,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 23:45:20,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:45:20,682 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:45:20,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190475325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:45:20,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:45:20,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 23:45:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862403439] [2024-11-13 23:45:20,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:45:20,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:45:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:45:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:45:20,685 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:45:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:20,714 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2024-11-13 23:45:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:45:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-11-13 23:45:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:20,715 INFO L225 Difference]: With dead ends: 29 [2024-11-13 23:45:20,715 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 23:45:20,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:45:20,716 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:20,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 23:45:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-13 23:45:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-13 23:45:20,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2024-11-13 23:45:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:20,721 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-13 23:45:20,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:45:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-13 23:45:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 23:45:20,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:20,722 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:20,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:45:20,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:20,923 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:20,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1518108386, now seen corresponding path program 1 times [2024-11-13 23:45:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028756518] [2024-11-13 23:45:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:45:21,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028756518] [2024-11-13 23:45:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028756518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301981902] [2024-11-13 23:45:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:21,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:21,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:45:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 23:45:21,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:45:21,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:45:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301981902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:45:21,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:45:21,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 23:45:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061305693] [2024-11-13 23:45:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:45:21,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:45:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:21,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:45:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:45:21,211 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:45:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:21,238 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-13 23:45:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:45:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-13 23:45:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:21,241 INFO L225 Difference]: With dead ends: 27 [2024-11-13 23:45:21,241 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 23:45:21,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:45:21,242 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:21,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 23:45:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-13 23:45:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-13 23:45:21,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2024-11-13 23:45:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:21,253 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-13 23:45:21,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:45:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-13 23:45:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 23:45:21,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:21,255 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:21,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:45:21,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:21,460 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:21,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1733891391, now seen corresponding path program 1 times [2024-11-13 23:45:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:21,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142360177] [2024-11-13 23:45:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 23:45:21,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:21,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142360177] [2024-11-13 23:45:21,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142360177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:21,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294155587] [2024-11-13 23:45:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:21,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:21,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:21,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:45:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 23:45:21,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 23:45:21,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 23:45:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294155587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:21,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721618752] [2024-11-13 23:45:21,797 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:45:21,797 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:21,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:21,805 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:21,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:22,687 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-13 23:45:22,765 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:25,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_14| Int) (|v_ULTIMATE.start_main_~ret~1#1_14| Int) (|v_ULTIMATE.start_main_~ret5~0#1_14| Int)) (and (<= |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_14| |v_ULTIMATE.start_main_~ret5~0#1_14|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_14| |v_ULTIMATE.start_main_~ret~1#1_14|))) (<= |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483647) (or (and (exists ((v_max_~ret~0_37 Int)) (= (mod v_max_~ret~0_37 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296))) (exists ((|v_#memory_int_35| (Array Int (Array Int Int)))) (= (store |v_#memory_int_35| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_35| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))) |#memory_int|))) (and (exists ((v_max_~ret~0_37 Int)) (= (mod v_max_~ret~0_37 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)) (exists ((|v_#memory_int_35| (Array Int (Array Int Int)))) (= (store |v_#memory_int_35| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_35| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))) |#memory_int|)))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_14| 2147483648)))))' at error location [2024-11-13 23:45:25,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:25,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:25,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-13 23:45:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505037928] [2024-11-13 23:45:25,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:25,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:45:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:45:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=265, Unknown=3, NotChecked=0, Total=342 [2024-11-13 23:45:25,816 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:45:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:25,858 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-11-13 23:45:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:45:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2024-11-13 23:45:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:25,861 INFO L225 Difference]: With dead ends: 36 [2024-11-13 23:45:25,862 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 23:45:25,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=74, Invalid=265, Unknown=3, NotChecked=0, Total=342 [2024-11-13 23:45:25,865 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:25,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 23:45:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-13 23:45:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-13 23:45:25,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2024-11-13 23:45:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:25,875 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-13 23:45:25,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:45:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-13 23:45:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 23:45:25,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:25,876 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:25,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 23:45:26,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:26,078 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:26,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 557904140, now seen corresponding path program 2 times [2024-11-13 23:45:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753938214] [2024-11-13 23:45:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:45:26,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753938214] [2024-11-13 23:45:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753938214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184404246] [2024-11-13 23:45:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:45:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:26,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:26,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:45:26,349 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:45:26,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:45:26,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 23:45:26,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:45:26,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 23:45:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184404246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:26,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259870449] [2024-11-13 23:45:26,414 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:45:26,415 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:26,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:26,415 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:26,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:26,872 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-13 23:45:26,924 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:33,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '808#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_15| Int) (|v_ULTIMATE.start_main_~ret~1#1_15| Int) (|v_ULTIMATE.start_main_~ret5~0#1_16| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_15| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483648)) (or (and (exists ((v_max_~ret~0_58 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296) (mod v_max_~ret~0_58 4294967296))) (exists ((|v_#memory_int_43| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_43| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16)))))) (and (exists ((|v_#memory_int_43| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_43| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))))) (exists ((v_max_~ret~0_58 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_16| (mod v_max_~ret~0_58 4294967296))))) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_15| |v_ULTIMATE.start_main_~ret~1#1_15|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_15| |v_ULTIMATE.start_main_~ret5~0#1_16|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483648)))))' at error location [2024-11-13 23:45:33,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:33,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:33,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-13 23:45:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503244709] [2024-11-13 23:45:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:33,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:45:33,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:45:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=265, Unknown=5, NotChecked=0, Total=342 [2024-11-13 23:45:33,828 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 23:45:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:33,854 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2024-11-13 23:45:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:45:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2024-11-13 23:45:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:33,856 INFO L225 Difference]: With dead ends: 38 [2024-11-13 23:45:33,857 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 23:45:33,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=72, Invalid=265, Unknown=5, NotChecked=0, Total=342 [2024-11-13 23:45:33,858 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:33,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 23:45:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 23:45:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-13 23:45:33,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2024-11-13 23:45:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:33,864 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-13 23:45:33,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 23:45:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-13 23:45:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:45:33,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:33,868 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:33,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:45:34,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:34,069 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:34,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1089151054, now seen corresponding path program 3 times [2024-11-13 23:45:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:34,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562563770] [2024-11-13 23:45:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:34,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-13 23:45:34,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:34,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562563770] [2024-11-13 23:45:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562563770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:34,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760673040] [2024-11-13 23:45:34,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:45:34,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:34,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:34,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:34,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:45:34,298 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:45:34,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:45:34,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 23:45:34,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-13 23:45:34,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-13 23:45:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760673040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227992145] [2024-11-13 23:45:34,406 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:45:34,406 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:34,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:34,406 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:34,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:34,717 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-13 23:45:34,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:41,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1149#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_18| Int) (|v_ULTIMATE.start_main_~ret2~0#1_17| Int) (|v_ULTIMATE.start_main_~ret~1#1_17| Int)) (and (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_17| |v_ULTIMATE.start_main_~ret~1#1_17|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_17| |v_ULTIMATE.start_main_~ret5~0#1_18|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_17| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_17| 2147483647) (or (and (exists ((|v_#memory_int_54| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))))) (exists ((v_max_~ret~0_91 Int)) (= (mod v_max_~ret~0_91 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296)))) (and (exists ((|v_#memory_int_54| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))))) (exists ((v_max_~ret~0_91 Int)) (= (mod v_max_~ret~0_91 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_18|)))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-13 23:45:41,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:41,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:41,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2024-11-13 23:45:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378304435] [2024-11-13 23:45:41,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:41,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:45:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:45:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=333, Unknown=17, NotChecked=0, Total=420 [2024-11-13 23:45:41,621 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 23:45:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:41,655 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-11-13 23:45:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:45:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2024-11-13 23:45:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:41,657 INFO L225 Difference]: With dead ends: 43 [2024-11-13 23:45:41,657 INFO L226 Difference]: Without dead ends: 26 [2024-11-13 23:45:41,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=70, Invalid=333, Unknown=17, NotChecked=0, Total=420 [2024-11-13 23:45:41,658 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:41,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-13 23:45:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-13 23:45:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-13 23:45:41,663 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2024-11-13 23:45:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:41,663 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-13 23:45:41,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 23:45:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-13 23:45:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:45:41,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:41,664 INFO L215 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:41,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:45:41,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 23:45:41,865 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:41,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2042693205, now seen corresponding path program 4 times [2024-11-13 23:45:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679074665] [2024-11-13 23:45:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-13 23:45:42,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679074665] [2024-11-13 23:45:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679074665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813489477] [2024-11-13 23:45:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:45:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:42,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:42,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:45:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:42,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 23:45:42,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-13 23:45:42,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-13 23:45:42,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813489477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429482051] [2024-11-13 23:45:42,322 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:45:42,322 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:42,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:42,322 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:42,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:42,669 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-13 23:45:42,714 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:45,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_19| Int) (|v_ULTIMATE.start_main_~ret5~0#1_20| Int) (|v_ULTIMATE.start_main_~ret~1#1_19| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483648)) (or (and (exists ((v_max_~ret~0_122 Int)) (= (mod v_max_~ret~0_122 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296))) (exists ((|v_#memory_int_70| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_70| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_70| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16)))))) (and (exists ((v_max_~ret~0_122 Int)) (= (mod v_max_~ret~0_122 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_20|)) (exists ((|v_#memory_int_70| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_70| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_70| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))))))) (<= |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_19| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_19| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_19| |v_ULTIMATE.start_main_~ret~1#1_19|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_19| |v_ULTIMATE.start_main_~ret5~0#1_20|))))))' at error location [2024-11-13 23:45:45,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:45,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 8 [2024-11-13 23:45:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653448548] [2024-11-13 23:45:45,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:45,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:45:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:45:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=292, Unknown=13, NotChecked=0, Total=380 [2024-11-13 23:45:45,754 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:45:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:45,795 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-13 23:45:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:45:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-11-13 23:45:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:45,798 INFO L225 Difference]: With dead ends: 47 [2024-11-13 23:45:45,798 INFO L226 Difference]: Without dead ends: 27 [2024-11-13 23:45:45,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=75, Invalid=292, Unknown=13, NotChecked=0, Total=380 [2024-11-13 23:45:45,799 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:45,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-13 23:45:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-13 23:45:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-13 23:45:45,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 41 [2024-11-13 23:45:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:45,814 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-13 23:45:45,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 23:45:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-13 23:45:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 23:45:45,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:45,815 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:45,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:45:46,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:46,015 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:46,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash -604544574, now seen corresponding path program 5 times [2024-11-13 23:45:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:46,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786598302] [2024-11-13 23:45:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2024-11-13 23:45:46,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786598302] [2024-11-13 23:45:46,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786598302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345458251] [2024-11-13 23:45:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:45:46,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:46,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:45:46,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:45:46,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:45:46,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:45:46,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-13 23:45:46,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2024-11-13 23:45:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345458251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869181792] [2024-11-13 23:45:46,368 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:45:46,368 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:46,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:46,370 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:46,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:46,699 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-13 23:45:46,736 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:49,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1920#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~1#1_20| Int) (|v_ULTIMATE.start_main_~ret2~0#1_21| Int) (|v_ULTIMATE.start_main_~ret5~0#1_22| Int)) (and (or (and (exists ((v_max_~ret~0_153 Int)) (= (mod v_max_~ret~0_153 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296))) (exists ((|v_#memory_int_81| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_81| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_81| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16)))))) (and (exists ((|v_#memory_int_81| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_81| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_81| |ULTIMATE.start_main_~#x~0#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 16))))) (exists ((v_max_~ret~0_153 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_22| (mod v_max_~ret~0_153 4294967296))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_20| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_20| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_20| |v_ULTIMATE.start_main_~ret5~0#1_22|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_21| |v_ULTIMATE.start_main_~ret~1#1_20|))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-13 23:45:49,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:49,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:49,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-13 23:45:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422533456] [2024-11-13 23:45:49,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:49,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:45:49,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:45:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=266, Unknown=3, NotChecked=0, Total=342 [2024-11-13 23:45:49,494 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 23:45:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:49,521 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-11-13 23:45:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:45:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-11-13 23:45:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:49,523 INFO L225 Difference]: With dead ends: 42 [2024-11-13 23:45:49,523 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 23:45:49,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=73, Invalid=266, Unknown=3, NotChecked=0, Total=342 [2024-11-13 23:45:49,524 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:49,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:45:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 23:45:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-13 23:45:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:45:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-13 23:45:49,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 42 [2024-11-13 23:45:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:49,530 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-13 23:45:49,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 23:45:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-13 23:45:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 23:45:49,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:49,531 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:49,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:45:49,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eec25f-dd40-4123-bb5d-60bccc4c462a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:49,732 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:49,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1756390754, now seen corresponding path program 6 times [2024-11-13 23:45:49,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:49,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450348678] [2024-11-13 23:45:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat