./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/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_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/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_e7bbb483-f51c-4791-9385-f9727bd7de39/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 1a590e2514668f126114e4312bb6236a04cce9502b393533b5b4bfd230be904b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:53:24,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:53:24,551 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:53:24,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:53:24,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:53:24,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:53:24,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:53:24,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:53:24,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:53:24,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:53:24,617 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:53:24,618 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:53:24,618 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:53:24,618 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:53:24,618 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:53:24,620 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:53:24,620 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:53:24,621 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:53:24,622 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:53:24,622 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:53:24,622 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:53:24,622 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:53:24,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:53:24,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:53:24,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:53:24,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:53:24,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:53:24,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:53:24,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:53:24,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:53:24,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:53:24,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:53:24,627 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_e7bbb483-f51c-4791-9385-f9727bd7de39/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 -> 1a590e2514668f126114e4312bb6236a04cce9502b393533b5b4bfd230be904b [2024-11-14 02:53:25,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:53:25,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:53:25,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:53:25,046 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:53:25,047 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:53:25,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c Unable to find full path for "g++" [2024-11-14 02:53:27,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:53:27,902 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:53:27,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c [2024-11-14 02:53:27,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/d43ebc2ef/bbe5e8752ea14c3587939b6ae94c1103/FLAG751ddec83 [2024-11-14 02:53:27,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/d43ebc2ef/bbe5e8752ea14c3587939b6ae94c1103 [2024-11-14 02:53:27,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:53:27,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:53:27,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:53:27,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:53:27,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:53:27,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:53:27" (1/1) ... [2024-11-14 02:53:27,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a9f91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:27, skipping insertion in model container [2024-11-14 02:53:27,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:53:27" (1/1) ... [2024-11-14 02:53:27,985 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:53:28,220 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_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2024-11-14 02:53:28,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:53:28,244 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:53:28,272 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_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2024-11-14 02:53:28,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:53:28,299 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:53:28,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28 WrapperNode [2024-11-14 02:53:28,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:53:28,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:53:28,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:53:28,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:53:28,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,349 INFO L138 Inliner]: procedures = 13, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-11-14 02:53:28,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:53:28,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:53:28,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:53:28,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:53:28,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,374 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,377 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:53:28,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:53:28,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:53:28,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:53:28,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (1/1) ... [2024-11-14 02:53:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:53:28,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:28,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:53:28,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:53:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:53:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:53:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:53:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:53:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_20_to_21_0 [2024-11-14 02:53:28,476 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_20_to_21_0 [2024-11-14 02:53:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:53:28,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:53:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:53:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_21_0 [2024-11-14 02:53:28,477 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_21_0 [2024-11-14 02:53:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:53:28,608 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:53:28,611 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:53:28,874 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 02:53:28,875 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:53:28,936 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:53:28,936 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 02:53:28,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:53:28 BoogieIcfgContainer [2024-11-14 02:53:28,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:53:28,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:53:28,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:53:28,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:53:28,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:53:27" (1/3) ... [2024-11-14 02:53:28,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33416a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:53:28, skipping insertion in model container [2024-11-14 02:53:28,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:53:28" (2/3) ... [2024-11-14 02:53:28,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33416a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:53:28, skipping insertion in model container [2024-11-14 02:53:28,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:53:28" (3/3) ... [2024-11-14 02:53:28,954 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_2.c [2024-11-14 02:53:28,976 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:53:28,979 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_2.c that has 3 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 02:53:29,062 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:53:29,079 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;@1acd1428, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:53:29,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:53:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 02:53:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 02:53:29,096 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:29,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:29,097 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:29,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1634918771, now seen corresponding path program 1 times [2024-11-14 02:53:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705191340] [2024-11-14 02:53:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:29,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705191340] [2024-11-14 02:53:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705191340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:29,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:53:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:53:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253564028] [2024-11-14 02:53:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:29,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:53:29,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:53:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:53:29,990 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 02:53:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:30,225 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-14 02:53:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:53:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-14 02:53:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:30,240 INFO L225 Difference]: With dead ends: 30 [2024-11-14 02:53:30,241 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:53:30,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:53:30,252 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:30,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:53:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:53:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-14 02:53:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 02:53:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 02:53:30,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2024-11-14 02:53:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:30,317 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 02:53:30,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 02:53:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 02:53:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 02:53:30,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:30,320 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:30,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:53:30,321 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:30,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash -268818197, now seen corresponding path program 1 times [2024-11-14 02:53:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:30,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452966134] [2024-11-14 02:53:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:53:30,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452966134] [2024-11-14 02:53:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452966134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:30,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:53:30,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 02:53:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116179366] [2024-11-14 02:53:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:30,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:53:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:53:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:53:30,928 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:53:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:31,089 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-11-14 02:53:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:53:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2024-11-14 02:53:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:31,091 INFO L225 Difference]: With dead ends: 40 [2024-11-14 02:53:31,091 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:53:31,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:53:31,093 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:31,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 42 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:53:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:53:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 02:53:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 02:53:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 02:53:31,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 20 [2024-11-14 02:53:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:31,105 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 02:53:31,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:53:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 02:53:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 02:53:31,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:31,106 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:31,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:53:31,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:31,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 659307019, now seen corresponding path program 1 times [2024-11-14 02:53:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114372959] [2024-11-14 02:53:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:53:31,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:31,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114372959] [2024-11-14 02:53:31,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114372959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:31,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662776942] [2024-11-14 02:53:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:31,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:53:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:31,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 02:53:31,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:32,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:53:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:53:32,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:53:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662776942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40907363] [2024-11-14 02:53:33,281 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:53:33,282 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:33,286 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:53:33,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:33,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2024-11-14 02:53:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706205041] [2024-11-14 02:53:33,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:33,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 02:53:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 02:53:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-14 02:53:33,292 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 02:53:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:33,684 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2024-11-14 02:53:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:53:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-11-14 02:53:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:33,686 INFO L225 Difference]: With dead ends: 46 [2024-11-14 02:53:33,687 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 02:53:33,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:53:33,690 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:33,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:53:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 02:53:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 02:53:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 02:53:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-14 02:53:33,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 25 [2024-11-14 02:53:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:33,708 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-14 02:53:33,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 02:53:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-14 02:53:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 02:53:33,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:33,710 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:33,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:53:33,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:33,910 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:33,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1625699077, now seen corresponding path program 2 times [2024-11-14 02:53:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:33,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51324224] [2024-11-14 02:53:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:33,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 02:53:35,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51324224] [2024-11-14 02:53:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51324224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:35,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717204208] [2024-11-14 02:53:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:53:35,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:35,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:35,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:53:35,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:53:35,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:53:35,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 02:53:35,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:35,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:53:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:53:35,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:53:38,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717204208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389710655] [2024-11-14 02:53:38,354 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:53:38,354 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:38,355 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:53:38,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:38,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 18] total 36 [2024-11-14 02:53:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389156312] [2024-11-14 02:53:38,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:38,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 02:53:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 02:53:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 02:53:38,363 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 36 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 31 states have internal predecessors, (44), 12 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-14 02:53:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:39,031 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-11-14 02:53:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 02:53:39,032 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 31 states have internal predecessors, (44), 12 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) Word has length 35 [2024-11-14 02:53:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:39,033 INFO L225 Difference]: With dead ends: 54 [2024-11-14 02:53:39,033 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 02:53:39,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 02:53:39,036 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:39,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:53:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 02:53:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 02:53:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 8 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 02:53:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-14 02:53:39,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 35 [2024-11-14 02:53:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:39,046 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-14 02:53:39,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 31 states have internal predecessors, (44), 12 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-14 02:53:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-14 02:53:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 02:53:39,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:39,048 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:39,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 02:53:39,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:39,252 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:39,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 167978987, now seen corresponding path program 3 times [2024-11-14 02:53:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563155693] [2024-11-14 02:53:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 02:53:40,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:40,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563155693] [2024-11-14 02:53:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563155693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:40,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432188859] [2024-11-14 02:53:40,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:53:40,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:40,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:40,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:53:40,696 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:53:40,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:53:40,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 02:53:40,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:40,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:53:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:53:41,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:53:45,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432188859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:45,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262091824] [2024-11-14 02:53:45,386 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:53:45,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:45,387 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:53:45,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 26] total 43 [2024-11-14 02:53:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626223228] [2024-11-14 02:53:45,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:45,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 02:53:45,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 02:53:45,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 02:53:45,393 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 36 states have internal predecessors, (49), 12 states have call successors, (13), 9 states have call predecessors, (13), 15 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2024-11-14 02:53:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:46,058 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-14 02:53:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:53:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 36 states have internal predecessors, (49), 12 states have call successors, (13), 9 states have call predecessors, (13), 15 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) Word has length 45 [2024-11-14 02:53:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:46,060 INFO L225 Difference]: With dead ends: 60 [2024-11-14 02:53:46,060 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 02:53:46,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=1965, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 02:53:46,063 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:46,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 192 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:53:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 02:53:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 02:53:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (11), 9 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 02:53:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-14 02:53:46,071 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 45 [2024-11-14 02:53:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:46,072 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-14 02:53:46,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 36 states have internal predecessors, (49), 12 states have call successors, (13), 9 states have call predecessors, (13), 15 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2024-11-14 02:53:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-14 02:53:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 02:53:46,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:46,073 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:46,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:53:46,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:46,278 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:46,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1170219963, now seen corresponding path program 4 times [2024-11-14 02:53:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:46,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788611622] [2024-11-14 02:53:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:46,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-14 02:53:52,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788611622] [2024-11-14 02:53:52,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788611622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242662032] [2024-11-14 02:53:52,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:53:52,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:52,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:52,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:53:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:52,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-14 02:53:52,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:52,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:53:52,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:53:55,101 WARN L851 $PredicateComparison]: unable to prove that (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |c_#memory_int| |c_func_to_recursive_line_21_to_21_0_#in~b.base|)) |c_#memory_int|) (exists ((|v_old(#memory_int)_AFTER_CALL_23| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_23| |c_#memory_int|))) (and (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| .cse0) (= (store |v_old(#memory_int)_AFTER_CALL_23| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_23| (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |v_old(#memory_int)_AFTER_CALL_23| |c_func_to_recursive_line_21_to_21_0_#in~b.base|))))))) is different from false [2024-11-14 02:53:57,104 WARN L873 $PredicateComparison]: unable to prove that (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |c_#memory_int| |c_func_to_recursive_line_21_to_21_0_#in~b.base|)) |c_#memory_int|) (exists ((|v_old(#memory_int)_AFTER_CALL_23| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_23| |c_#memory_int|))) (and (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| .cse0) (= (store |v_old(#memory_int)_AFTER_CALL_23| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_23| (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |v_old(#memory_int)_AFTER_CALL_23| |c_func_to_recursive_line_21_to_21_0_#in~b.base|))))))) is different from true [2024-11-14 02:53:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 72 trivial. 6 not checked. [2024-11-14 02:53:57,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:57,953 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_240 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_240) |c_ULTIMATE.start_main_~#a~0#1.base|) |c_ULTIMATE.start_main_~#a~0#1.offset|) 5)) is different from false [2024-11-14 02:53:57,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242662032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:57,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263728470] [2024-11-14 02:53:57,962 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:53:57,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:57,963 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:53:57,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:53:57,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2024-11-14 02:53:57,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745145087] [2024-11-14 02:53:57,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:57,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 02:53:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 02:53:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=277, Unknown=3, NotChecked=70, Total=420 [2024-11-14 02:53:57,970 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 02:54:00,147 WARN L851 $PredicateComparison]: unable to prove that (and (= (store |c_old(#memory_int)| c_func_to_recursive_line_21_to_21_0_~b.base (select |c_#memory_int| c_func_to_recursive_line_21_to_21_0_~b.base)) |c_#memory_int|) (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |c_#memory_int| |c_func_to_recursive_line_21_to_21_0_#in~b.base|)) |c_#memory_int|) (exists ((|v_old(#memory_int)_AFTER_CALL_23| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_23| |c_#memory_int|))) (and (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| .cse0) (= (store |v_old(#memory_int)_AFTER_CALL_23| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_23| (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |v_old(#memory_int)_AFTER_CALL_23| |c_func_to_recursive_line_21_to_21_0_#in~b.base|))))))) (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| c_func_to_recursive_line_21_to_21_0_~b.base)) is different from false [2024-11-14 02:54:02,149 WARN L873 $PredicateComparison]: unable to prove that (and (= (store |c_old(#memory_int)| c_func_to_recursive_line_21_to_21_0_~b.base (select |c_#memory_int| c_func_to_recursive_line_21_to_21_0_~b.base)) |c_#memory_int|) (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |c_#memory_int| |c_func_to_recursive_line_21_to_21_0_#in~b.base|)) |c_#memory_int|) (exists ((|v_old(#memory_int)_AFTER_CALL_23| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_23| |c_#memory_int|))) (and (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| .cse0) (= (store |v_old(#memory_int)_AFTER_CALL_23| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_23| (store |c_old(#memory_int)| |c_func_to_recursive_line_21_to_21_0_#in~b.base| (select |v_old(#memory_int)_AFTER_CALL_23| |c_func_to_recursive_line_21_to_21_0_#in~b.base|))))))) (= |c_func_to_recursive_line_21_to_21_0_#in~b.base| c_func_to_recursive_line_21_to_21_0_~b.base)) is different from true [2024-11-14 02:54:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:02,299 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-11-14 02:54:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:54:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 50 [2024-11-14 02:54:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:02,301 INFO L225 Difference]: With dead ends: 38 [2024-11-14 02:54:02,301 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:54:02,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=102, Invalid=367, Unknown=5, NotChecked=126, Total=600 [2024-11-14 02:54:02,302 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:02,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 1 Unknown, 42 Unchecked, 0.2s Time] [2024-11-14 02:54:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:54:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:54:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (12), 10 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 02:54:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2024-11-14 02:54:02,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 50 [2024-11-14 02:54:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:02,322 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2024-11-14 02:54:02,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 16 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 02:54:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2024-11-14 02:54:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 02:54:02,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:02,329 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:54:02,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:02,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 02:54:02,533 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:02,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2066322437, now seen corresponding path program 5 times [2024-11-14 02:54:02,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:02,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81927044] [2024-11-14 02:54:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-14 02:54:10,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:10,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81927044] [2024-11-14 02:54:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81927044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198233228] [2024-11-14 02:54:10,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:54:10,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:10,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:10,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:54:11,337 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 02:54:11,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:54:11,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-14 02:54:11,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:11,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:54:11,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-14 02:54:12,687 INFO L349 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2024-11-14 02:54:12,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 87 [2024-11-14 02:54:12,842 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:54:12,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2024-11-14 02:54:12,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:54:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 236 proven. 58 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-14 02:54:13,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:14,893 INFO L349 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2024-11-14 02:54:14,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 57 [2024-11-14 02:54:14,906 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 02:54:14,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2024-11-14 02:54:14,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-14 02:54:25,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198233228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:25,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938408042] [2024-11-14 02:54:25,765 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:54:25,765 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:54:25,765 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:54:25,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:54:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 38 [2024-11-14 02:54:25,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827201757] [2024-11-14 02:54:25,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:25,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 02:54:25,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 02:54:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1722, Unknown=4, NotChecked=0, Total=1892 [2024-11-14 02:54:25,771 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 38 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 34 states have internal predecessors, (47), 11 states have call successors, (12), 2 states have call predecessors, (12), 15 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 02:54:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:27,918 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2024-11-14 02:54:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 02:54:27,919 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 34 states have internal predecessors, (47), 11 states have call successors, (12), 2 states have call predecessors, (12), 15 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 91 [2024-11-14 02:54:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:27,920 INFO L225 Difference]: With dead ends: 48 [2024-11-14 02:54:27,920 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 02:54:27,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=339, Invalid=3562, Unknown=5, NotChecked=0, Total=3906 [2024-11-14 02:54:27,923 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:27,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 273 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 2 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:54:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 02:54:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2024-11-14 02:54:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 11 states have return successors, (13), 11 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-14 02:54:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2024-11-14 02:54:27,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 91 [2024-11-14 02:54:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:27,938 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2024-11-14 02:54:27,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 34 states have internal predecessors, (47), 11 states have call successors, (12), 2 states have call predecessors, (12), 15 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 02:54:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2024-11-14 02:54:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 02:54:27,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:27,941 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 18, 18, 18, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:54:27,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:28,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:28,142 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:28,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -4769101, now seen corresponding path program 6 times [2024-11-14 02:54:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163265917] [2024-11-14 02:54:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 56 proven. 127 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2024-11-14 02:54:37,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163265917] [2024-11-14 02:54:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163265917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051754108] [2024-11-14 02:54:37,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:54:37,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:37,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:37,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:54:37,967 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:54:37,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:54:37,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 248 conjuncts are in the unsatisfiable core [2024-11-14 02:54:37,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:38,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:54:38,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 02:54:38,576 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-14 02:54:38,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2024-11-14 02:54:38,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:54:39,652 INFO L349 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2024-11-14 02:54:39,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 87 [2024-11-14 02:54:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:54:39,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2024-11-14 02:54:39,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:54:39,968 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-14 02:54:39,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-14 02:54:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 246 proven. 440 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-11-14 02:54:40,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:43,506 INFO L349 Elim1Store]: treesize reduction 34, result has 58.5 percent of original size [2024-11-14 02:54:43,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 652 treesize of output 661 [2024-11-14 02:54:43,620 INFO L349 Elim1Store]: treesize reduction 32, result has 59.5 percent of original size [2024-11-14 02:54:43,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 599 treesize of output 580 [2024-11-14 02:54:43,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:54:43,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 453 treesize of output 469 [2024-11-14 02:54:43,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:54:43,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 482 [2024-11-14 02:54:44,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:54:47,196 INFO L349 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2024-11-14 02:54:47,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 447 treesize of output 451 [2024-11-14 02:54:47,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:54:47,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2024-11-14 02:54:47,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:54:47,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 423 treesize of output 431 [2024-11-14 02:54:51,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051754108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:51,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749326411] [2024-11-14 02:54:51,357 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:54:51,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:54:51,357 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:54:51,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:54:51,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 43 [2024-11-14 02:54:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024488101] [2024-11-14 02:54:51,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:51,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 02:54:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 02:54:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2074, Unknown=3, NotChecked=0, Total=2256 [2024-11-14 02:54:51,362 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 38 states have internal predecessors, (50), 13 states have call successors, (15), 2 states have call predecessors, (15), 16 states have return successors, (23), 22 states have call predecessors, (23), 13 states have call successors, (23) [2024-11-14 02:54:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:54,130 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2024-11-14 02:54:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 02:54:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 38 states have internal predecessors, (50), 13 states have call successors, (15), 2 states have call predecessors, (15), 16 states have return successors, (23), 22 states have call predecessors, (23), 13 states have call successors, (23) Word has length 132 [2024-11-14 02:54:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:54,134 INFO L225 Difference]: With dead ends: 66 [2024-11-14 02:54:54,134 INFO L226 Difference]: Without dead ends: 60 [2024-11-14 02:54:54,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=459, Invalid=4507, Unknown=4, NotChecked=0, Total=4970 [2024-11-14 02:54:54,140 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 95 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:54,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 330 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 596 Invalid, 14 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 02:54:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-14 02:54:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2024-11-14 02:54:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (27), 17 states have call predecessors, (27), 5 states have call successors, (27) [2024-11-14 02:54:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-11-14 02:54:54,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 132 [2024-11-14 02:54:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:54,163 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-11-14 02:54:54,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 38 states have internal predecessors, (50), 13 states have call successors, (15), 2 states have call predecessors, (15), 16 states have return successors, (23), 22 states have call predecessors, (23), 13 states have call successors, (23) [2024-11-14 02:54:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-11-14 02:54:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-14 02:54:54,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:54,166 INFO L215 NwaCegarLoop]: trace histogram [29, 29, 25, 25, 25, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:54:54,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 02:54:54,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 02:54:54,367 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:54,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash -704118179, now seen corresponding path program 7 times [2024-11-14 02:54:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139209366] [2024-11-14 02:54:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 67 proven. 756 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2024-11-14 02:54:56,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139209366] [2024-11-14 02:54:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139209366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234158563] [2024-11-14 02:54:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:54:56,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:56,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:56,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:54:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:56,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 335 conjuncts are in the unsatisfiable core [2024-11-14 02:54:56,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:56,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:55:01,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-11-14 02:55:04,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 14 [2024-11-14 02:55:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 88 proven. 934 refuted. 1 times theorem prover too weak. 959 trivial. 0 not checked. [2024-11-14 02:55:11,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234158563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834274084] [2024-11-14 02:55:32,885 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:55:32,885 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:55:32,886 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 02:55:32,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:55:32,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 37] total 51 [2024-11-14 02:55:32,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084168270] [2024-11-14 02:55:32,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:32,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 02:55:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:55:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 02:55:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2462, Unknown=12, NotChecked=0, Total=2652 [2024-11-14 02:55:32,891 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 51 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 46 states have internal predecessors, (65), 19 states have call successors, (22), 2 states have call predecessors, (22), 23 states have return successors, (32), 25 states have call predecessors, (32), 19 states have call successors, (32) [2024-11-14 02:57:00,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40m for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:57:31,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:59:01,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49m for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:59:11,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:59:12,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:59:14,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:59:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:14,332 INFO L93 Difference]: Finished difference Result 101 states and 175 transitions. [2024-11-14 02:59:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 02:59:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 46 states have internal predecessors, (65), 19 states have call successors, (22), 2 states have call predecessors, (22), 23 states have return successors, (32), 25 states have call predecessors, (32), 19 states have call successors, (32) Word has length 178 [2024-11-14 02:59:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:15,163 INFO L225 Difference]: With dead ends: 101 [2024-11-14 02:59:15,163 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 02:59:15,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=601, Invalid=6188, Unknown=17, NotChecked=0, Total=6806 [2024-11-14 02:59:15,167 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 109 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:15,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 382 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 970 Invalid, 12 Unknown, 0 Unchecked, 198.0s Time] [2024-11-14 02:59:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 02:59:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 02:59:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 02:59:15,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2024-11-14 02:59:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:15,169 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 02:59:15,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 46 states have internal predecessors, (65), 19 states have call successors, (22), 2 states have call predecessors, (22), 23 states have return successors, (32), 25 states have call predecessors, (32), 19 states have call successors, (32) [2024-11-14 02:59:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 02:59:15,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 02:59:15,175 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 02:59:15,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:59:15,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 02:59:15,379 INFO L407 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2024-11-14 02:59:15,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 02:59:28,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2024-11-14 02:59:28,967 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 02:59:28,968 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.push(UndoableWrapperScript.java:54) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:648) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:223) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:309) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:162) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.(HoareAnnotationComposer.java:111) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer.computeHoareAnnotationComposer(NwaHoareProofProducer.java:152) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer.lambda$3(NwaHoareProofProducer.java:139) at de.uni_freiburg.informatik.ultimate.util.statistics.TimeTracker.measure(TimeTracker.java:51) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer$Statistics.measureProofComputation(NwaHoareProofProducer.java:191) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer.computeProof(NwaHoareProofProducer.java:138) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer.getOrComputeProof(NwaHoareProofProducer.java:132) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.NwaHoareProofProducer.getOrComputeProof(NwaHoareProofProducer.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.initialabstraction.BacktranslatingProofProducer.getOrComputeProof(BacktranslatingProofProducer.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 44 more [2024-11-14 02:59:28,971 INFO L158 Benchmark]: Toolchain (without parser) took 361024.81ms. Allocated memory was 167.8MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 129.0MB in the beginning and 477.2MB in the end (delta: -348.2MB). Peak memory consumption was 686.0MB. Max. memory is 16.1GB. [2024-11-14 02:59:28,971 INFO L158 Benchmark]: CDTParser took 1.18ms. Allocated memory is still 167.8MB. Free memory is still 104.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:59:28,971 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.59ms. Allocated memory is still 167.8MB. Free memory was 128.7MB in the beginning and 118.3MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 02:59:28,972 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.34ms. Allocated memory is still 167.8MB. Free memory was 118.3MB in the beginning and 117.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:59:28,972 INFO L158 Benchmark]: Boogie Preprocessor took 27.08ms. Allocated memory is still 167.8MB. Free memory was 117.1MB in the beginning and 116.2MB in the end (delta: 878.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:59:28,972 INFO L158 Benchmark]: RCFGBuilder took 559.51ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 103.0MB in the end (delta: 13.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 02:59:28,973 INFO L158 Benchmark]: TraceAbstraction took 360028.58ms. Allocated memory was 167.8MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 102.4MB in the beginning and 477.2MB in the end (delta: -374.8MB). Peak memory consumption was 660.8MB. Max. memory is 16.1GB. [2024-11-14 02:59:28,976 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18ms. Allocated memory is still 167.8MB. Free memory is still 104.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.59ms. Allocated memory is still 167.8MB. Free memory was 128.7MB in the beginning and 118.3MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.34ms. Allocated memory is still 167.8MB. Free memory was 118.3MB in the beginning and 117.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.08ms. Allocated memory is still 167.8MB. Free memory was 117.1MB in the beginning and 116.2MB in the end (delta: 878.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 559.51ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 103.0MB in the end (delta: 13.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 360028.58ms. Allocated memory was 167.8MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 102.4MB in the beginning and 477.2MB in the end (delta: -374.8MB). Peak memory consumption was 660.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/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_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/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 1a590e2514668f126114e4312bb6236a04cce9502b393533b5b4bfd230be904b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:59:31,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:59:32,106 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-14 02:59:32,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:59:32,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:59:32,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:59:32,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:59:32,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:59:32,173 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:59:32,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:59:32,175 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:59:32,175 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:59:32,175 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:59:32,175 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:59:32,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:59:32,176 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:59:32,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:59:32,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:59:32,177 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:59:32,177 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:59:32,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:59:32,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:59:32,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:59:32,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:59:32,179 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:59:32,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:59:32,180 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:59:32,180 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 02:59:32,181 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 02:59:32,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:59:32,181 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:59:32,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e7bbb483-f51c-4791-9385-f9727bd7de39/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 -> 1a590e2514668f126114e4312bb6236a04cce9502b393533b5b4bfd230be904b [2024-11-14 02:59:32,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:59:32,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:59:32,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:59:32,585 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:59:32,585 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:59:32,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c Unable to find full path for "g++" [2024-11-14 02:59:35,007 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:59:35,320 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:59:35,324 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c [2024-11-14 02:59:35,336 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/201f8ea6c/15093214ad574e3b9ffa76f243069727/FLAG80840e15c [2024-11-14 02:59:35,367 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/data/201f8ea6c/15093214ad574e3b9ffa76f243069727 [2024-11-14 02:59:35,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:59:35,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:59:35,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:59:35,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:59:35,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:59:35,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f87c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35, skipping insertion in model container [2024-11-14 02:59:35,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,411 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:59:35,627 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_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2024-11-14 02:59:35,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:59:35,651 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:59:35,676 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_e7bbb483-f51c-4791-9385-f9727bd7de39/sv-benchmarks/c/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2024-11-14 02:59:35,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:59:35,700 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:59:35,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35 WrapperNode [2024-11-14 02:59:35,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:59:35,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:59:35,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:59:35,705 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:59:35,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,752 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-11-14 02:59:35,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:59:35,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:59:35,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:59:35,756 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:59:35,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:59:35,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:59:35,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:59:35,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:59:35,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (1/1) ... [2024-11-14 02:59:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:59:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:35,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:59:35,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:59:35,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:59:35,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 02:59:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2024-11-14 02:59:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:59:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-14 02:59:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_20_to_21_0 [2024-11-14 02:59:35,896 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_20_to_21_0 [2024-11-14 02:59:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:59:35,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:59:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_21_0 [2024-11-14 02:59:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_21_0 [2024-11-14 02:59:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:59:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 02:59:36,021 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:59:36,024 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:59:36,286 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 02:59:36,287 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:59:36,305 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:59:36,306 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 02:59:36,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:59:36 BoogieIcfgContainer [2024-11-14 02:59:36,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:59:36,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:59:36,314 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:59:36,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:59:36,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:59:35" (1/3) ... [2024-11-14 02:59:36,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c10d840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:59:36, skipping insertion in model container [2024-11-14 02:59:36,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:35" (2/3) ... [2024-11-14 02:59:36,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c10d840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:59:36, skipping insertion in model container [2024-11-14 02:59:36,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:59:36" (3/3) ... [2024-11-14 02:59:36,325 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_2.c [2024-11-14 02:59:36,347 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:59:36,350 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_2.c that has 3 procedures, 24 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 02:59:36,431 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:59:36,452 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;@3cc43cf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:59:36,453 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:59:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.3125) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 02:59:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:59:36,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:36,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:36,471 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:36,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -927054850, now seen corresponding path program 1 times [2024-11-14 02:59:36,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:36,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917459428] [2024-11-14 02:59:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:36,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:36,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:36,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 02:59:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:36,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:59:36,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:36,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:36,912 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:59:36,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:59:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917459428] [2024-11-14 02:59:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917459428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 02:59:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025745838] [2024-11-14 02:59:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:36,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:59:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:59:36,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:59:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:59:36,948 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.3125) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 02:59:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:37,154 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-14 02:59:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:59:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-14 02:59:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:37,167 INFO L225 Difference]: With dead ends: 37 [2024-11-14 02:59:37,169 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:59:37,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:59:37,179 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:37,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 57 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:59:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-14 02:59:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 02:59:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-14 02:59:37,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2024-11-14 02:59:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:37,237 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-14 02:59:37,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 02:59:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-14 02:59:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:59:37,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:37,240 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:37,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:59:37,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:37,443 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:37,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1141956254, now seen corresponding path program 1 times [2024-11-14 02:59:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:37,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079154083] [2024-11-14 02:59:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:37,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:37,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:37,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 02:59:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:37,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:59:37,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:37,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:37,753 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:59:37,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:59:37,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079154083] [2024-11-14 02:59:37,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079154083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:37,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 02:59:37,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101111907] [2024-11-14 02:59:37,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:37,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:59:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:59:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:59:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:59:37,761 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:37,922 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-11-14 02:59:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:59:37,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-11-14 02:59:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:37,926 INFO L225 Difference]: With dead ends: 43 [2024-11-14 02:59:37,926 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:59:37,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:59:37,928 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:37,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:59:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:59:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 02:59:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 02:59:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 02:59:37,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2024-11-14 02:59:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:37,947 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 02:59:37,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 02:59:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 02:59:37,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:37,950 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:37,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 02:59:38,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:38,151 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:38,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1444799936, now seen corresponding path program 1 times [2024-11-14 02:59:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:38,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967498430] [2024-11-14 02:59:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:38,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:38,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 02:59:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:38,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:59:38,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:38,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:59:38,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:39,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:59:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967498430] [2024-11-14 02:59:39,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967498430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [647534457] [2024-11-14 02:59:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:39,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:59:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:59:40,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:59:40,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-14 02:59:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:40,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 02:59:40,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:40,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:59:40,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [647534457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927803329] [2024-11-14 02:59:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:41,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:41,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:59:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:41,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:59:41,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:41,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:59:41,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:42,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927803329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:42,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 02:59:42,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11, 10, 9, 10] total 20 [2024-11-14 02:59:42,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911887919] [2024-11-14 02:59:42,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:42,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 02:59:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:59:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 02:59:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-14 02:59:42,443 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 20 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-14 02:59:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:43,125 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-14 02:59:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 02:59:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) Word has length 27 [2024-11-14 02:59:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:43,128 INFO L225 Difference]: With dead ends: 50 [2024-11-14 02:59:43,128 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 02:59:43,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-14 02:59:43,130 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:43,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:59:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 02:59:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-14 02:59:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 02:59:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 02:59:43,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-11-14 02:59:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:43,151 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 02:59:43,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-14 02:59:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 02:59:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 02:59:43,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:43,154 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:43,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:59:43,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-14 02:59:43,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 02:59:43,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:43,755 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:43,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1635249458, now seen corresponding path program 2 times [2024-11-14 02:59:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:43,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965734245] [2024-11-14 02:59:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 02:59:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:43,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:43,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-14 02:59:43,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 02:59:43,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:43,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 02:59:43,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:43,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:59:44,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:46,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:59:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965734245] [2024-11-14 02:59:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965734245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1355709236] [2024-11-14 02:59:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 02:59:46,159 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:59:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:59:46,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:59:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-14 02:59:46,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:59:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985748734] [2024-11-14 02:59:46,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 1 [2024-11-14 02:59:46,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 02:59:46,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:46,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:46,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:59:46,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 02:59:46,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:46,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 02:59:46,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:46,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:59:46,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:48,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985748734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:48,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-14 02:59:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 10, 14] total 22 [2024-11-14 02:59:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721234694] [2024-11-14 02:59:48,088 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:48,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 02:59:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:59:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 02:59:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:59:48,091 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 02:59:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:48,871 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-11-14 02:59:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:59:48,873 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 32 [2024-11-14 02:59:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:48,873 INFO L225 Difference]: With dead ends: 51 [2024-11-14 02:59:48,873 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 02:59:48,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:59:48,875 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:48,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:59:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 02:59:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 02:59:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 02:59:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 02:59:48,884 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2024-11-14 02:59:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:48,885 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 02:59:48,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 02:59:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 02:59:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 02:59:48,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:48,887 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:48,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:59:49,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-11-14 02:59:49,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:49,288 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:49,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash 680267408, now seen corresponding path program 3 times [2024-11-14 02:59:49,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:49,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670720606] [2024-11-14 02:59:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:59:49,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:49,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:49,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-14 02:59:49,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:59:49,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:49,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 02:59:49,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:49,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:59:49,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:53,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 02:59:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670720606] [2024-11-14 02:59:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670720606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1486244825] [2024-11-14 02:59:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:59:53,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 02:59:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 02:59:53,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 02:59:53,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-14 02:59:53,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:59:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059655706] [2024-11-14 02:59:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:59:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:53,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 1 [2024-11-14 02:59:53,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:59:53,416 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:59:53,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:53,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 02:59:53,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:53,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:59:53,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059655706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:55,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-14 02:59:55,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 11, 18] total 27 [2024-11-14 02:59:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19360120] [2024-11-14 02:59:55,622 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:55,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 02:59:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 02:59:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 02:59:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:59:55,624 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 8 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 02:59:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:56,609 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-11-14 02:59:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:59:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 8 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 37 [2024-11-14 02:59:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:56,612 INFO L225 Difference]: With dead ends: 55 [2024-11-14 02:59:56,612 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 02:59:56,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-11-14 02:59:56,614 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:56,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 175 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:59:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 02:59:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 02:59:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-14 02:59:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-14 02:59:56,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2024-11-14 02:59:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:56,625 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-14 02:59:56,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 8 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 02:59:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-14 02:59:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 02:59:56,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:56,626 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:56,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-14 02:59:56,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:59:57,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:57,027 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:57,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2140733182, now seen corresponding path program 4 times [2024-11-14 02:59:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 02:59:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280787178] [2024-11-14 02:59:57,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:59:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 02:59:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 02:59:57,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 02:59:57,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-14 02:59:57,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:59:57,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:57,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 02:59:57,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:57,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:59:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 02:59:57,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:01,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:00:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280787178] [2024-11-14 03:00:01,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280787178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:01,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695127254] [2024-11-14 03:00:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:00:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:00:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:00:01,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:00:01,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-14 03:00:02,187 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:00:02,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:02,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-14 03:00:02,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:02,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:00:02,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695127254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007514383] [2024-11-14 03:00:05,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:00:05,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:05,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:05,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:00:05,795 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:00:05,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:05,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:00:05,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:05,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:00:06,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:09,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007514383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:09,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:00:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 14, 22, 12, 22] total 35 [2024-11-14 03:00:09,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113056695] [2024-11-14 03:00:09,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:09,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:00:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:00:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:00:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:00:09,024 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 35 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 29 states have internal predecessors, (42), 11 states have call successors, (12), 8 states have call predecessors, (12), 12 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:00:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:10,678 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-11-14 03:00:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:00:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 29 states have internal predecessors, (42), 11 states have call successors, (12), 8 states have call predecessors, (12), 12 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) Word has length 42 [2024-11-14 03:00:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:10,680 INFO L225 Difference]: With dead ends: 62 [2024-11-14 03:00:10,680 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 03:00:10,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:00:10,683 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:10,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 238 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:00:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 03:00:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-14 03:00:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 8 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 03:00:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-14 03:00:10,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 42 [2024-11-14 03:00:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:10,692 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-14 03:00:10,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 29 states have internal predecessors, (42), 11 states have call successors, (12), 8 states have call predecessors, (12), 12 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:00:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-14 03:00:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:00:10,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:10,694 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:10,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:00:10,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:11,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:11,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:11,296 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:11,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2132847328, now seen corresponding path program 5 times [2024-11-14 03:00:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:00:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359809369] [2024-11-14 03:00:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-14 03:00:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:00:11,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:00:11,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-14 03:00:11,422 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-14 03:00:11,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:11,425 WARN L253 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 03:00:11,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:11,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 03:00:11,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:17,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:00:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359809369] [2024-11-14 03:00:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359809369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850142782] [2024-11-14 03:00:17,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-14 03:00:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:00:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:00:17,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:00:17,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-14 03:00:17,752 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-14 03:00:17,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:17,754 WARN L253 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 03:00:17,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:17,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 03:00:18,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:22,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850142782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:22,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925088970] [2024-11-14 03:00:22,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-14 03:00:22,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:22,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:22,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:22,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:00:22,329 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-14 03:00:22,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:22,331 WARN L253 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 03:00:22,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:22,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:00:23,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:00:31,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925088970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:31,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:00:31,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26, 13, 26, 15, 26] total 65 [2024-11-14 03:00:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039487524] [2024-11-14 03:00:31,694 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:31,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 03:00:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:00:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 03:00:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3673, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:00:31,700 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 65 states, 50 states have (on average 1.32) internal successors, (66), 53 states have internal predecessors, (66), 17 states have call successors, (18), 14 states have call predecessors, (18), 24 states have return successors, (27), 21 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-14 03:00:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:36,075 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-11-14 03:00:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:00:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 50 states have (on average 1.32) internal successors, (66), 53 states have internal predecessors, (66), 17 states have call successors, (18), 14 states have call predecessors, (18), 24 states have return successors, (27), 21 states have call predecessors, (27), 17 states have call successors, (27) Word has length 47 [2024-11-14 03:00:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:36,078 INFO L225 Difference]: With dead ends: 68 [2024-11-14 03:00:36,078 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 03:00:36,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=724, Invalid=4678, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 03:00:36,081 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:36,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 355 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:00:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 03:00:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-11-14 03:00:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (11), 9 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 03:00:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-14 03:00:36,092 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 47 [2024-11-14 03:00:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:36,093 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-14 03:00:36,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 50 states have (on average 1.32) internal successors, (66), 53 states have internal predecessors, (66), 17 states have call successors, (18), 14 states have call predecessors, (18), 24 states have return successors, (27), 21 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-14 03:00:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-14 03:00:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 03:00:36,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:36,095 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:36,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-14 03:00:36,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-11-14 03:00:36,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:00:36,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:36,696 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:36,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1019454254, now seen corresponding path program 6 times [2024-11-14 03:00:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:00:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349693854] [2024-11-14 03:00:36,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-14 03:00:36,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:00:36,699 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:00:36,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-11-14 03:00:36,939 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-14 03:00:36,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:36,952 WARN L253 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 03:00:36,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:36,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:37,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:38,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 03:00:38,263 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:00:38,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 03:00:38,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:00:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 03:00:38,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:40,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:00:40,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-14 03:00:40,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2024-11-14 03:00:42,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:00:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349693854] [2024-11-14 03:00:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349693854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [231126539] [2024-11-14 03:00:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-14 03:00:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:00:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:00:42,230 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:00:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-14 03:00:42,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:00:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039199199] [2024-11-14 03:00:42,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-14 03:00:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:42,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 1 [2024-11-14 03:00:42,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:42,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:00:42,987 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-14 03:00:42,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:42,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 03:00:42,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:43,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:43,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:44,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 03:00:44,215 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:00:44,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 03:00:44,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:00:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:00:44,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:45,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:00:45,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-14 03:00:45,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2024-11-14 03:00:47,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039199199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:47,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:00:47,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 28 [2024-11-14 03:00:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778352606] [2024-11-14 03:00:47,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:47,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 03:00:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:00:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 03:00:47,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=896, Unknown=2, NotChecked=0, Total=992 [2024-11-14 03:00:47,178 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 03:00:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:48,962 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-14 03:00:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:00:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2024-11-14 03:00:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:48,964 INFO L225 Difference]: With dead ends: 52 [2024-11-14 03:00:48,964 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 03:00:48,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=151, Invalid=1487, Unknown=2, NotChecked=0, Total=1640 [2024-11-14 03:00:48,965 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:48,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 257 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:00:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 03:00:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2024-11-14 03:00:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 12 states have return successors, (18), 13 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-14 03:00:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-14 03:00:48,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 52 [2024-11-14 03:00:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:48,988 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-14 03:00:48,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 03:00:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-14 03:00:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 03:00:48,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:48,991 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:49,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:00:49,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-11-14 03:00:49,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:49,393 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:49,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1019452332, now seen corresponding path program 1 times [2024-11-14 03:00:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:00:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641960942] [2024-11-14 03:00:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:49,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:00:49,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:00:49,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-11-14 03:00:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:49,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 03:00:49,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:49,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:49,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-14 03:00:50,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:51,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:00:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641960942] [2024-11-14 03:00:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641960942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159605167] [2024-11-14 03:00:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:51,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:00:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:00:51,268 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:00:51,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-14 03:00:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:51,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 03:00:51,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:51,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:51,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-14 03:00:52,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159605167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833863750] [2024-11-14 03:00:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:52,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:52,850 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:52,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:00:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:53,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 03:00:53,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:53,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:53,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-14 03:00:53,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833863750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:54,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:00:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-11-14 03:00:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042737442] [2024-11-14 03:00:54,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:54,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:00:54,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:00:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:00:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=212, Unknown=10, NotChecked=0, Total=272 [2024-11-14 03:00:54,116 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 16 states, 10 states have (on average 2.2) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 03:00:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:54,843 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-14 03:00:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:00:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.2) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2024-11-14 03:00:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:54,845 INFO L225 Difference]: With dead ends: 57 [2024-11-14 03:00:54,845 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 03:00:54,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=296, Unknown=14, NotChecked=0, Total=380 [2024-11-14 03:00:54,846 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:54,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 6 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:00:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 03:00:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-14 03:00:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 14 states have return successors, (22), 15 states have call predecessors, (22), 5 states have call successors, (22) [2024-11-14 03:00:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-11-14 03:00:54,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 52 [2024-11-14 03:00:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:54,863 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-11-14 03:00:54,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.2) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 03:00:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-11-14 03:00:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 03:00:54,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:54,867 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:54,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:00:55,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:55,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:55,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:55,468 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:55,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash -760268984, now seen corresponding path program 2 times [2024-11-14 03:00:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:00:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732350336] [2024-11-14 03:00:55,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:00:55,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:00:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:00:55,471 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:00:55,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-11-14 03:00:55,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:00:55,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:55,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-14 03:00:55,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:55,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:00:55,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:57,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-11-14 03:00:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2024-11-14 03:00:57,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:59,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:00:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732350336] [2024-11-14 03:00:59,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732350336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2140188538] [2024-11-14 03:00:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:00:59,625 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:00:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:00:59,629 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:00:59,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-14 03:01:00,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:01:00,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589494124] [2024-11-14 03:01:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:01:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:01:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:01:00,066 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:01:00,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:01:00,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2024-11-14 03:01:00,300 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:01:00,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:01:00,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-14 03:01:00,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:00,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:01:00,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:01:01,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-11-14 03:01:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 23 proven. 79 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2024-11-14 03:01:01,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:02,826 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1251 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1252 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (bvadd (_ bv1 32) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base| (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_1251) |c_ULTIMATE.start_main_~#a~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset| (bvadd (_ bv1 32) (select .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset|))))) |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_1252) |c_ULTIMATE.start_main_~#a~0#1.base|) |c_ULTIMATE.start_main_~#a~0#1.offset|)) (_ bv6 32))) is different from false [2024-11-14 03:01:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589494124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:01:02,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:01:02,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 21 [2024-11-14 03:01:02,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351486918] [2024-11-14 03:01:02,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:01:02,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:01:02,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:01:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:01:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=381, Unknown=18, NotChecked=40, Total=506 [2024-11-14 03:01:02,830 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 21 states, 13 states have (on average 2.0) internal successors, (26), 19 states have internal predecessors, (26), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-14 03:01:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:01:07,175 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-11-14 03:01:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:01:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 13 states have (on average 2.0) internal successors, (26), 19 states have internal predecessors, (26), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) Word has length 93 [2024-11-14 03:01:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:01:07,178 INFO L225 Difference]: With dead ends: 61 [2024-11-14 03:01:07,179 INFO L226 Difference]: Without dead ends: 54 [2024-11-14 03:01:07,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=93, Invalid=530, Unknown=31, NotChecked=48, Total=702 [2024-11-14 03:01:07,180 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 5 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:01:07,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 257 Invalid, 15 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 03:01:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-14 03:01:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-14 03:01:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 16 states have return successors, (26), 17 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-14 03:01:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-14 03:01:07,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 93 [2024-11-14 03:01:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:01:07,208 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-14 03:01:07,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 13 states have (on average 2.0) internal successors, (26), 19 states have internal predecessors, (26), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-14 03:01:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-14 03:01:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 03:01:07,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:01:07,211 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 18, 18, 18, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:01:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-14 03:01:07,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2024-11-14 03:01:07,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:01:07,612 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:01:07,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:01:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash 589759004, now seen corresponding path program 3 times [2024-11-14 03:01:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:01:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916079496] [2024-11-14 03:01:07,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:01:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:01:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:01:07,620 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:01:07,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2024-11-14 03:01:08,117 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 03:01:08,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:01:08,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 03:01:08,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:08,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:01:08,394 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:01:08,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 03:01:08,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:01:08,786 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:01:08,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2024-11-14 03:01:08,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-14 03:01:09,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-14 03:01:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 475 proven. 32 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-11-14 03:01:09,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:11,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2024-11-14 03:01:12,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:12,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 338 [2024-11-14 03:01:12,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:12,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 332 [2024-11-14 03:01:12,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-14 03:01:12,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:12,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 184 [2024-11-14 03:01:14,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:14,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 338 [2024-11-14 03:01:14,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:14,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 332 [2024-11-14 03:01:14,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-14 03:01:14,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-14 03:01:14,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:14,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 166 [2024-11-14 03:01:17,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:01:17,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916079496] [2024-11-14 03:01:17,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916079496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:01:17,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207473180] [2024-11-14 03:01:17,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:01:17,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:01:17,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:01:17,424 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:01:17,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-14 03:01:17,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:01:17,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877531899] [2024-11-14 03:01:17,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:01:17,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:01:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:01:17,857 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:01:17,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:01:17,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2024-11-14 03:01:20,191 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 03:01:20,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:01:20,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 03:01:20,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:20,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:01:20,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:01:21,552 INFO L349 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2024-11-14 03:01:21,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 77 [2024-11-14 03:01:21,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:01:21,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2024-11-14 03:01:21,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 20 [2024-11-14 03:01:21,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-14 03:01:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 472 proven. 40 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2024-11-14 03:01:21,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:23,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:23,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2024-11-14 03:01:23,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2024-11-14 03:01:24,694 INFO L349 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2024-11-14 03:01:24,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 269 treesize of output 215 [2024-11-14 03:01:24,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:24,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 284 [2024-11-14 03:01:24,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:24,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 266 [2024-11-14 03:01:24,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-14 03:01:24,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:24,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 305 [2024-11-14 03:01:26,842 WARN L851 $PredicateComparison]: unable to prove that (or (not (bvslt (select (select |c_#memory_int| c_func_to_recursive_line_20_to_21_0_~a.base) c_func_to_recursive_line_20_to_21_0_~a.offset) (_ bv6 32))) (and (forall ((v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_int| c_func_to_recursive_line_20_to_21_0_~b.base v_ArrVal_1662))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_20_to_21_0_~a.base))) (let ((.cse0 (bvadd (select .cse2 c_func_to_recursive_line_20_to_21_0_~a.offset) (_ bv1 32)))) (or (bvslt .cse0 (_ bv6 32)) (not (bvslt (select (select (store .cse1 c_func_to_recursive_line_20_to_21_0_~a.base (store .cse2 c_func_to_recursive_line_20_to_21_0_~a.offset .cse0)) |c_func_to_recursive_line_20_to_21_0_#in~a.base|) |c_func_to_recursive_line_20_to_21_0_#in~a.offset|) (_ bv6 32)))))))) (forall ((v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_int| c_func_to_recursive_line_20_to_21_0_~b.base v_ArrVal_1662))) (let ((.cse5 (select .cse4 c_func_to_recursive_line_20_to_21_0_~a.base))) (let ((.cse3 (bvadd (select .cse5 c_func_to_recursive_line_20_to_21_0_~a.offset) (_ bv1 32)))) (or (bvslt .cse3 (_ bv6 32)) (bvslt (bvadd (select (select (store .cse4 c_func_to_recursive_line_20_to_21_0_~a.base (store .cse5 c_func_to_recursive_line_20_to_21_0_~a.offset .cse3)) |c_func_to_recursive_line_20_to_21_0_#in~a.base|) |c_func_to_recursive_line_20_to_21_0_#in~a.offset|) (_ bv4294967295 32)) (_ bv6 32)))))))) (= |c_func_to_recursive_line_20_to_21_0_#in~a.base| |c_func_to_recursive_line_20_to_21_0_#in~b.base|)) is different from false [2024-11-14 03:01:26,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877531899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:01:26,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:01:26,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2024-11-14 03:01:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719557272] [2024-11-14 03:01:26,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:01:26,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:01:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:01:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:01:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=698, Unknown=8, NotChecked=54, Total=870 [2024-11-14 03:01:26,862 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 21 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-14 03:01:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:01:28,126 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-11-14 03:01:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:01:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 134 [2024-11-14 03:01:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:01:28,128 INFO L225 Difference]: With dead ends: 57 [2024-11-14 03:01:28,129 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 03:01:28,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 265 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=1031, Unknown=8, NotChecked=66, Total=1260 [2024-11-14 03:01:28,130 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:01:28,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:01:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 03:01:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-14 03:01:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 12 states have return successors, (18), 13 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-14 03:01:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-11-14 03:01:28,156 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 134 [2024-11-14 03:01:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:01:28,157 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-11-14 03:01:28,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-14 03:01:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-11-14 03:01:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:01:28,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:01:28,161 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 21, 21, 21, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:01:28,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:01:28,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2024-11-14 03:01:28,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:01:28,562 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:01:28,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:01:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 561671828, now seen corresponding path program 7 times [2024-11-14 03:01:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:01:28,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525085081] [2024-11-14 03:01:28,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:01:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:01:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:01:28,565 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 03:01:28,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2024-11-14 03:01:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:01:28,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-14 03:01:28,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:28,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:01:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 632 proven. 68 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2024-11-14 03:01:29,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2024-11-14 03:01:36,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:01:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525085081] [2024-11-14 03:01:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525085081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:01:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895368981] [2024-11-14 03:01:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:01:36,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:01:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:01:36,926 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:01:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-14 03:01:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:01:37,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-14 03:01:37,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:37,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:01:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 632 proven. 68 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2024-11-14 03:01:38,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2024-11-14 03:01:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895368981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:01:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121485058] [2024-11-14 03:01:43,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:01:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:01:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:01:43,636 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:01:43,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:01:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:01:43,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-14 03:01:43,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:43,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:01:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 630 proven. 63 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2024-11-14 03:01:45,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:02:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 6 proven. 749 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2024-11-14 03:02:02,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121485058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:02:02,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:02:02,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30, 16, 30, 17, 34] total 81 [2024-11-14 03:02:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356003313] [2024-11-14 03:02:02,113 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:02:02,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 03:02:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:02:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 03:02:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=5813, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 03:02:02,116 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 81 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 65 states have internal predecessors, (91), 23 states have call successors, (29), 18 states have call predecessors, (29), 25 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2024-11-14 03:02:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:02:13,640 INFO L93 Difference]: Finished difference Result 83 states and 143 transitions. [2024-11-14 03:02:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 03:02:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 65 states have internal predecessors, (91), 23 states have call successors, (29), 18 states have call predecessors, (29), 25 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) Word has length 149 [2024-11-14 03:02:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:02:13,642 INFO L225 Difference]: With dead ends: 83 [2024-11-14 03:02:13,642 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 03:02:13,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1851, Invalid=10139, Unknown=0, NotChecked=0, Total=11990 [2024-11-14 03:02:13,650 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:02:13,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 152 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:02:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 03:02:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 03:02:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 03:02:13,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 149 [2024-11-14 03:02:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:02:13,652 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 03:02:13,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 65 states have internal predecessors, (91), 23 states have call successors, (29), 18 states have call predecessors, (29), 25 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2024-11-14 03:02:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 03:02:13,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 03:02:13,655 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 03:02:13,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-11-14 03:02:13,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 03:02:14,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2024-11-14 03:02:14,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 03:02:14,259 INFO L407 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1] [2024-11-14 03:02:14,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 03:02:33,262 WARN L286 SmtUtils]: Spent 15.80s on a formula simplification. DAG size of input: 160 DAG size of output: 40 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-14 03:02:38,234 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:02:38,241 WARN L162 FloydHoareUtils]: Requires clause for func_to_recursive_line_20_to_21_0 contained old-variable. Original clause: (and (or (= (_ bv6 32) (select (select |old(#memory_int)| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|)) (= |func_to_recursive_line_20_to_21_0_#in~b.base| |func_to_recursive_line_20_to_21_0_#in~a.base|)) (= |old(#memory_int)| |#memory_int|)) Eliminated clause: (or (= |func_to_recursive_line_20_to_21_0_#in~b.base| |func_to_recursive_line_20_to_21_0_#in~a.base|) (= (_ bv6 32) (select (select |#memory_int| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|))) [2024-11-14 03:02:38,253 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~b!base [2024-11-14 03:02:38,254 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~a!base [2024-11-14 03:02:38,256 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,256 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,257 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,257 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~b!base [2024-11-14 03:02:38,257 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~a!base [2024-11-14 03:02:38,257 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,257 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~b!base [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~a!base [2024-11-14 03:02:38,258 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,259 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,260 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] [2024-11-14 03:02:38,260 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,260 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~b!base [2024-11-14 03:02:38,260 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #in~a!base [2024-11-14 03:02:38,264 WARN L162 FloydHoareUtils]: Requires clause for func_to_recursive_line_21_to_21_0 contained old-variable. Original clause: (and (= |old(#memory_int)| |#memory_int|) (let ((.cse0 (select (select |old(#memory_int)| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|))) (or (not (bvslt .cse0 (_ bv6 32))) (not (bvslt (bvadd .cse0 (_ bv6 32)) (_ bv6 32)))))) Eliminated clause: (let ((.cse0 (select (select |#memory_int| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|))) (or (not (bvslt .cse0 (_ bv6 32))) (not (bvslt (bvadd (_ bv6 32) .cse0) (_ bv6 32))))) [2024-11-14 03:02:38,284 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,287 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,287 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,288 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int [2024-11-14 03:02:38,289 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] [2024-11-14 03:02:38,289 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] [2024-11-14 03:02:38,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:02:38 BoogieIcfgContainer [2024-11-14 03:02:38,293 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:02:38,294 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:02:38,294 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:02:38,294 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:02:38,295 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:59:36" (3/4) ... [2024-11-14 03:02:38,298 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 03:02:38,305 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_20_to_21_0 [2024-11-14 03:02:38,305 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_21_to_21_0 [2024-11-14 03:02:38,310 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-14 03:02:38,311 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-14 03:02:38,312 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-14 03:02:38,312 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 03:02:38,405 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 03:02:38,405 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 03:02:38,405 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:02:38,406 INFO L158 Benchmark]: Toolchain (without parser) took 183031.67ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 60.3MB in the beginning and 103.0MB in the end (delta: -42.7MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. [2024-11-14 03:02:38,408 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 83.9MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:02:38,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.41ms. Allocated memory is still 83.9MB. Free memory was 60.3MB in the beginning and 49.2MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:02:38,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.86ms. Allocated memory is still 83.9MB. Free memory was 49.2MB in the beginning and 48.2MB in the end (delta: 965.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:02:38,409 INFO L158 Benchmark]: Boogie Preprocessor took 46.43ms. Allocated memory is still 83.9MB. Free memory was 47.9MB in the beginning and 47.3MB in the end (delta: 625.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:02:38,409 INFO L158 Benchmark]: RCFGBuilder took 505.33ms. Allocated memory is still 83.9MB. Free memory was 47.1MB in the beginning and 35.8MB in the end (delta: 11.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:02:38,409 INFO L158 Benchmark]: TraceAbstraction took 181979.53ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 35.2MB in the beginning and 106.6MB in the end (delta: -71.4MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. [2024-11-14 03:02:38,410 INFO L158 Benchmark]: Witness Printer took 111.41ms. Allocated memory is still 176.2MB. Free memory was 106.6MB in the beginning and 103.0MB in the end (delta: 3.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:02:38,414 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 83.9MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.41ms. Allocated memory is still 83.9MB. Free memory was 60.3MB in the beginning and 49.2MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.86ms. Allocated memory is still 83.9MB. Free memory was 49.2MB in the beginning and 48.2MB in the end (delta: 965.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.43ms. Allocated memory is still 83.9MB. Free memory was 47.9MB in the beginning and 47.3MB in the end (delta: 625.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 505.33ms. Allocated memory is still 83.9MB. Free memory was 47.1MB in the beginning and 35.8MB in the end (delta: 11.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 181979.53ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 35.2MB in the beginning and 106.6MB in the end (delta: -71.4MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. * Witness Printer took 111.41ms. Allocated memory is still 176.2MB. Free memory was 106.6MB in the beginning and 103.0MB in the end (delta: 3.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~b!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~a!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~b!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~a!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~b!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~a!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~a!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~b!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #in~a!base - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array IdentifierExpression[#memory_int,GLOBAL] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[IdentifierExpression[#memory_int,GLOBAL],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Cannot backtranslate array access to array ArrayAccessExpression[UnaryExpression[OLD,IdentifierExpression[#memory_int,GLOBAL]],[IdentifierExpression[#in~b!base,]]] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 69]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 157.9s, OverallIterations: 12, TraceHistogramMax: 24, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 28.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 mSolverCounterUnknown, 426 SdHoareTripleChecker+Valid, 12.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 416 mSDsluCounter, 1838 SdHoareTripleChecker+Invalid, 11.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1612 mSDsCounter, 465 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3602 IncrementalHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 465 mSolverCounterUnsat, 226 mSDtfsCounter, 3602 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2736 GetRequests, 2303 SyntacticMatches, 12 SemanticMatches, 421 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6766 ImplicationChecksByTransitivity, 44.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=10, InterpolantAutomatonStates: 168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 113.4s InterpolantComputationTime, 1680 NumberOfCodeBlocks, 1614 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 2570 ConstructedInterpolants, 24 QuantifiedInterpolants, 19687 SizeOfPredicates, 372 NumberOfNonLiveVariables, 4781 ConjunctsInSsa, 1411 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 9134/12527 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-14 03:02:38,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7bbb483-f51c-4791-9385-f9727bd7de39/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE