./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:15:23,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:15:23,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:15:23,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:15:23,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:15:23,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:15:23,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:15:23,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:15:23,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:15:23,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:15:23,485 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:15:23,485 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:15:23,485 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:15:23,485 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:15:23,486 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:15:23,486 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:15:23,486 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:15:23,486 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:15:23,486 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:15:23,486 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:15:23,487 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:15:23,487 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:15:23,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:15:23,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:15:23,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:15:23,488 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:15:23,489 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:15:23,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:23,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:15:23,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:15:23,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:15:23,491 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:15:23,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:15:23,491 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_96968940-b67b-4bd6-8085-7c983b776c38/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 [2024-11-14 03:15:23,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:15:23,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:15:23,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:15:23,891 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:15:23,892 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:15:23,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c Unable to find full path for "g++" [2024-11-14 03:15:26,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:15:26,641 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:15:26,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-14 03:15:26,652 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/efb8c4144/9716eaa34cb24b0ba6ab3dc8e0160c97/FLAG3372685d4 [2024-11-14 03:15:26,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/efb8c4144/9716eaa34cb24b0ba6ab3dc8e0160c97 [2024-11-14 03:15:26,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:15:26,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:15:26,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:26,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:15:26,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:15:26,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:26" (1/1) ... [2024-11-14 03:15:26,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282b0576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:26, skipping insertion in model container [2024-11-14 03:15:26,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:26" (1/1) ... [2024-11-14 03:15:26,884 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:15:27,211 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 03:15:27,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:27,242 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:15:27,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:27,344 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:15:27,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27 WrapperNode [2024-11-14 03:15:27,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:27,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:27,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:15:27,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:15:27,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,432 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2024-11-14 03:15:27,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:27,433 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:15:27,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:15:27,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:15:27,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,489 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:15:27,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:15:27,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:15:27,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:15:27,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (1/1) ... [2024-11-14 03:15:27,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:27,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:15:27,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:15:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:15:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-14 03:15:27,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-14 03:15:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-14 03:15:27,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-14 03:15:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-14 03:15:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-14 03:15:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:15:27,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:15:27,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:15:27,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:15:27,626 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-14 03:15:27,835 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:15:27,837 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:15:28,636 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-14 03:15:28,640 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:15:29,411 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:15:29,413 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:15:29,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:29 BoogieIcfgContainer [2024-11-14 03:15:29,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:15:29,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:15:29,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:15:29,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:15:29,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:15:26" (1/3) ... [2024-11-14 03:15:29,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406a7867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:29, skipping insertion in model container [2024-11-14 03:15:29,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:27" (2/3) ... [2024-11-14 03:15:29,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406a7867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:29, skipping insertion in model container [2024-11-14 03:15:29,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:29" (3/3) ... [2024-11-14 03:15:29,431 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt3.wvr.c [2024-11-14 03:15:29,452 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:15:29,456 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt3.wvr.c that has 5 procedures, 61 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2024-11-14 03:15:29,456 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-14 03:15:29,590 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-14 03:15:29,634 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 66 transitions, 160 flow [2024-11-14 03:15:30,691 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 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 03:15:30,730 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:15:30,749 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=None, 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;@b603489, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:15:30,749 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-14 03:15:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 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 03:15:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:15:30,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:30,819 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:15:30,820 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:30,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 886520, now seen corresponding path program 1 times [2024-11-14 03:15:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:30,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111379912] [2024-11-14 03:15:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:30,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:31,303 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 03:15:31,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:31,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111379912] [2024-11-14 03:15:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111379912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:31,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:31,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:15:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094433371] [2024-11-14 03:15:31,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:31,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:31,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:31,388 INFO L87 Difference]: Start difference. First operand has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 03:15:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:32,109 INFO L93 Difference]: Finished difference Result 12507 states and 54891 transitions. [2024-11-14 03:15:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:15:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:32,412 INFO L225 Difference]: With dead ends: 12507 [2024-11-14 03:15:32,412 INFO L226 Difference]: Without dead ends: 12503 [2024-11-14 03:15:32,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:32,429 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:32,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12503 states. [2024-11-14 03:15:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12503 to 12503. [2024-11-14 03:15:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12420 states have (on average 4.419243156199678) internal successors, (54887), 12502 states have internal predecessors, (54887), 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 03:15:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 54887 transitions. [2024-11-14 03:15:33,862 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 54887 transitions. Word has length 3 [2024-11-14 03:15:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:33,864 INFO L471 AbstractCegarLoop]: Abstraction has 12503 states and 54887 transitions. [2024-11-14 03:15:33,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 03:15:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 54887 transitions. [2024-11-14 03:15:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:15:33,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:33,866 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:15:33,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:15:33,869 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:33,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash 886521, now seen corresponding path program 1 times [2024-11-14 03:15:33,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:33,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125134142] [2024-11-14 03:15:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:33,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:34,558 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 03:15:34,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125134142] [2024-11-14 03:15:34,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125134142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:34,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:34,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:15:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066503739] [2024-11-14 03:15:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:34,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:34,562 INFO L87 Difference]: Start difference. First operand 12503 states and 54887 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 03:15:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:35,095 INFO L93 Difference]: Finished difference Result 12506 states and 54891 transitions. [2024-11-14 03:15:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:15:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:35,245 INFO L225 Difference]: With dead ends: 12506 [2024-11-14 03:15:35,246 INFO L226 Difference]: Without dead ends: 12505 [2024-11-14 03:15:35,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:35,257 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:35,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2024-11-14 03:15:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12505. [2024-11-14 03:15:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 12422 states have (on average 4.418773144421189) internal successors, (54890), 12504 states have internal predecessors, (54890), 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 03:15:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 54890 transitions. [2024-11-14 03:15:36,256 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 54890 transitions. Word has length 3 [2024-11-14 03:15:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:36,257 INFO L471 AbstractCegarLoop]: Abstraction has 12505 states and 54890 transitions. [2024-11-14 03:15:36,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 03:15:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 54890 transitions. [2024-11-14 03:15:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:15:36,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:36,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:15:36,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:15:36,259 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:36,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 27484203, now seen corresponding path program 1 times [2024-11-14 03:15:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:36,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813618697] [2024-11-14 03:15:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:36,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:36,770 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 03:15:36,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813618697] [2024-11-14 03:15:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813618697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:36,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:36,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616208199] [2024-11-14 03:15:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:36,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:36,775 INFO L87 Difference]: Start difference. First operand 12505 states and 54890 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 03:15:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:37,600 INFO L93 Difference]: Finished difference Result 12508 states and 54894 transitions. [2024-11-14 03:15:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:15:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:15:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:37,949 INFO L225 Difference]: With dead ends: 12508 [2024-11-14 03:15:37,954 INFO L226 Difference]: Without dead ends: 12507 [2024-11-14 03:15:37,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:15:37,966 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:37,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2024-11-14 03:15:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 12507. [2024-11-14 03:15:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12507 states, 12424 states have (on average 4.418303283966517) internal successors, (54893), 12506 states have internal predecessors, (54893), 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 03:15:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12507 states to 12507 states and 54893 transitions. [2024-11-14 03:15:38,741 INFO L78 Accepts]: Start accepts. Automaton has 12507 states and 54893 transitions. Word has length 4 [2024-11-14 03:15:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:38,742 INFO L471 AbstractCegarLoop]: Abstraction has 12507 states and 54893 transitions. [2024-11-14 03:15:38,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 03:15:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 12507 states and 54893 transitions. [2024-11-14 03:15:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:15:38,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:38,744 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 03:15:38,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:15:38,744 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:38,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash 851975990, now seen corresponding path program 1 times [2024-11-14 03:15:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27574877] [2024-11-14 03:15:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:39,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27574877] [2024-11-14 03:15:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27574877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146878990] [2024-11-14 03:15:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:39,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:39,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:39,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:39,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:15:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:39,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:15:39,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:39,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-14 03:15:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:40,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:40,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146878990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:40,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798916850] [2024-11-14 03:15:40,206 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:259) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) 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.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) 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 03:15:40,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 03:15:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350748985] [2024-11-14 03:15:40,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:40,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:15:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:15:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:15:40,211 INFO L87 Difference]: Start difference. First operand 12507 states and 54893 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:40,911 INFO L93 Difference]: Finished difference Result 12509 states and 54897 transitions. [2024-11-14 03:15:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:15:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:15:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:41,035 INFO L225 Difference]: With dead ends: 12509 [2024-11-14 03:15:41,035 INFO L226 Difference]: Without dead ends: 12508 [2024-11-14 03:15:41,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:15:41,046 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:41,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:15:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12508 states. [2024-11-14 03:15:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12508 to 12504. [2024-11-14 03:15:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12504 states, 12422 states have (on average 4.41869264208662) internal successors, (54889), 12503 states have internal predecessors, (54889), 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 03:15:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12504 states to 12504 states and 54889 transitions. [2024-11-14 03:15:41,714 INFO L78 Accepts]: Start accepts. Automaton has 12504 states and 54889 transitions. Word has length 5 [2024-11-14 03:15:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:41,714 INFO L471 AbstractCegarLoop]: Abstraction has 12504 states and 54889 transitions. [2024-11-14 03:15:41,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12504 states and 54889 transitions. [2024-11-14 03:15:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:15:41,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:41,715 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 03:15:41,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:15:41,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 03:15:41,916 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:41,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 642543740, now seen corresponding path program 1 times [2024-11-14 03:15:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305787637] [2024-11-14 03:15:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:42,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:42,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305787637] [2024-11-14 03:15:42,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305787637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:42,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886101510] [2024-11-14 03:15:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:42,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:42,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:42,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:15:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:42,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:15:42,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:42,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-14 03:15:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:43,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886101510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852957136] [2024-11-14 03:15:43,331 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:259) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) 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.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) 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 03:15:43,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:43,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-14 03:15:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004967185] [2024-11-14 03:15:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:43,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:15:43,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:15:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:15:43,335 INFO L87 Difference]: Start difference. First operand 12504 states and 54889 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 03:15:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:44,379 INFO L93 Difference]: Finished difference Result 12510 states and 54899 transitions. [2024-11-14 03:15:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:15:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 03:15:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:44,535 INFO L225 Difference]: With dead ends: 12510 [2024-11-14 03:15:44,535 INFO L226 Difference]: Without dead ends: 12509 [2024-11-14 03:15:44,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:15:44,548 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:44,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 102 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:15:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12509 states. [2024-11-14 03:15:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12509 to 12501. [2024-11-14 03:15:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12501 states, 12420 states have (on average 4.419082125603865) internal successors, (54885), 12500 states have internal predecessors, (54885), 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 03:15:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12501 states to 12501 states and 54885 transitions. [2024-11-14 03:15:45,326 INFO L78 Accepts]: Start accepts. Automaton has 12501 states and 54885 transitions. Word has length 6 [2024-11-14 03:15:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:45,327 INFO L471 AbstractCegarLoop]: Abstraction has 12501 states and 54885 transitions. [2024-11-14 03:15:45,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 03:15:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12501 states and 54885 transitions. [2024-11-14 03:15:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:15:45,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:45,328 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:45,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:15:45,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:45,529 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:45,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash -914060351, now seen corresponding path program 1 times [2024-11-14 03:15:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:45,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047491510] [2024-11-14 03:15:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:45,684 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 03:15:45,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047491510] [2024-11-14 03:15:45,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047491510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:45,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:45,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:15:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650652648] [2024-11-14 03:15:45,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:45,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:45,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:45,686 INFO L87 Difference]: Start difference. First operand 12501 states and 54885 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:15:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:46,606 INFO L93 Difference]: Finished difference Result 28876 states and 130085 transitions. [2024-11-14 03:15:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:15:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 03:15:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:46,818 INFO L225 Difference]: With dead ends: 28876 [2024-11-14 03:15:46,818 INFO L226 Difference]: Without dead ends: 17049 [2024-11-14 03:15:46,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:46,858 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:46,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 51 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17049 states. [2024-11-14 03:15:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17049 to 16793. [2024-11-14 03:15:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 16688 states have (on average 4.33299376797699) internal successors, (72309), 16792 states have internal predecessors, (72309), 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 03:15:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 72309 transitions. [2024-11-14 03:15:47,886 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 72309 transitions. Word has length 8 [2024-11-14 03:15:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:47,886 INFO L471 AbstractCegarLoop]: Abstraction has 16793 states and 72309 transitions. [2024-11-14 03:15:47,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:15:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 72309 transitions. [2024-11-14 03:15:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:15:47,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:47,888 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:47,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:15:47,889 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:47,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash 62951844, now seen corresponding path program 1 times [2024-11-14 03:15:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:47,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212117117] [2024-11-14 03:15:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:15:48,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:48,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212117117] [2024-11-14 03:15:48,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212117117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:48,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:48,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:15:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054616769] [2024-11-14 03:15:48,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:48,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:48,169 INFO L87 Difference]: Start difference. First operand 16793 states and 72309 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:15:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:48,779 INFO L93 Difference]: Finished difference Result 16793 states and 72309 transitions. [2024-11-14 03:15:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:15:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:15:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:48,894 INFO L225 Difference]: With dead ends: 16793 [2024-11-14 03:15:48,894 INFO L226 Difference]: Without dead ends: 14101 [2024-11-14 03:15:48,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:48,908 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:48,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14101 states. [2024-11-14 03:15:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14101 to 14101. [2024-11-14 03:15:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14101 states, 14041 states have (on average 4.3030410939391786) internal successors, (60419), 14100 states have internal predecessors, (60419), 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 03:15:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14101 states to 14101 states and 60419 transitions. [2024-11-14 03:15:49,831 INFO L78 Accepts]: Start accepts. Automaton has 14101 states and 60419 transitions. Word has length 10 [2024-11-14 03:15:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:49,831 INFO L471 AbstractCegarLoop]: Abstraction has 14101 states and 60419 transitions. [2024-11-14 03:15:49,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:15:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14101 states and 60419 transitions. [2024-11-14 03:15:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:15:49,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:49,836 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:49,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:15:49,836 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:49,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 62951845, now seen corresponding path program 1 times [2024-11-14 03:15:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613595221] [2024-11-14 03:15:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:50,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613595221] [2024-11-14 03:15:50,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613595221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697582478] [2024-11-14 03:15:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:50,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:50,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:50,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:15:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:50,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:15:50,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:50,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-14 03:15:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:15:50,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 03:15:50,563 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:15:50,563 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 11 treesize of output 11 [2024-11-14 03:15:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:50,604 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697582478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:50,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:50,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 03:15:50,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916380682] [2024-11-14 03:15:50,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:50,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:50,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:50,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:15:50,607 INFO L87 Difference]: Start difference. First operand 14101 states and 60419 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:50,857 INFO L93 Difference]: Finished difference Result 14101 states and 60419 transitions. [2024-11-14 03:15:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:15:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:50,944 INFO L225 Difference]: With dead ends: 14101 [2024-11-14 03:15:50,944 INFO L226 Difference]: Without dead ends: 11733 [2024-11-14 03:15:50,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:15:50,957 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:50,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11733 states. [2024-11-14 03:15:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11733 to 11733. [2024-11-14 03:15:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11733 states, 11700 states have (on average 4.2708547008547) internal successors, (49969), 11732 states have internal predecessors, (49969), 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 03:15:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11733 states to 11733 states and 49969 transitions. [2024-11-14 03:15:51,635 INFO L78 Accepts]: Start accepts. Automaton has 11733 states and 49969 transitions. Word has length 10 [2024-11-14 03:15:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:51,635 INFO L471 AbstractCegarLoop]: Abstraction has 11733 states and 49969 transitions. [2024-11-14 03:15:51,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11733 states and 49969 transitions. [2024-11-14 03:15:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:15:51,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:51,639 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:15:51,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:15:51,843 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:51,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1520899294, now seen corresponding path program 1 times [2024-11-14 03:15:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:51,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843390963] [2024-11-14 03:15:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:51,979 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 03:15:51,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843390963] [2024-11-14 03:15:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843390963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:51,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:51,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163654850] [2024-11-14 03:15:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:51,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:51,981 INFO L87 Difference]: Start difference. First operand 11733 states and 49969 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:52,210 INFO L93 Difference]: Finished difference Result 11733 states and 49969 transitions. [2024-11-14 03:15:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:15:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:52,304 INFO L225 Difference]: With dead ends: 11733 [2024-11-14 03:15:52,304 INFO L226 Difference]: Without dead ends: 9294 [2024-11-14 03:15:52,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:52,315 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:52,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2024-11-14 03:15:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 9294. [2024-11-14 03:15:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9281 states have (on average 4.252451244477966) internal successors, (39467), 9293 states have internal predecessors, (39467), 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 03:15:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 39467 transitions. [2024-11-14 03:15:53,028 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 39467 transitions. Word has length 10 [2024-11-14 03:15:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:53,029 INFO L471 AbstractCegarLoop]: Abstraction has 9294 states and 39467 transitions. [2024-11-14 03:15:53,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 39467 transitions. [2024-11-14 03:15:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:15:53,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:53,031 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:53,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:15:53,031 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:53,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1520899295, now seen corresponding path program 1 times [2024-11-14 03:15:53,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916732244] [2024-11-14 03:15:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:53,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:53,257 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 03:15:53,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:53,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916732244] [2024-11-14 03:15:53,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916732244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:53,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:53,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868474209] [2024-11-14 03:15:53,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:53,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:15:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:15:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:53,259 INFO L87 Difference]: Start difference. First operand 9294 states and 39467 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:53,760 INFO L93 Difference]: Finished difference Result 22072 states and 95318 transitions. [2024-11-14 03:15:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:15:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:53,881 INFO L225 Difference]: With dead ends: 22072 [2024-11-14 03:15:53,881 INFO L226 Difference]: Without dead ends: 11877 [2024-11-14 03:15:53,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:15:53,903 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:53,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 51 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11877 states. [2024-11-14 03:15:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11877 to 11739. [2024-11-14 03:15:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11739 states, 11726 states have (on average 4.162971175166297) internal successors, (48815), 11738 states have internal predecessors, (48815), 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 03:15:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11739 states to 11739 states and 48815 transitions. [2024-11-14 03:15:54,821 INFO L78 Accepts]: Start accepts. Automaton has 11739 states and 48815 transitions. Word has length 10 [2024-11-14 03:15:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:54,821 INFO L471 AbstractCegarLoop]: Abstraction has 11739 states and 48815 transitions. [2024-11-14 03:15:54,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:15:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 11739 states and 48815 transitions. [2024-11-14 03:15:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:15:54,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:54,822 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:54,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:15:54,822 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:54,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1122179984, now seen corresponding path program 1 times [2024-11-14 03:15:54,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:54,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150169415] [2024-11-14 03:15:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:54,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:55,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150169415] [2024-11-14 03:15:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150169415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155758751] [2024-11-14 03:15:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:55,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:55,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:15:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:55,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:15:55,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:55,439 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155758751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:55,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-14 03:15:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947599046] [2024-11-14 03:15:55,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:55,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:15:55,441 INFO L87 Difference]: Start difference. First operand 11739 states and 48815 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:55,667 INFO L93 Difference]: Finished difference Result 11739 states and 48815 transitions. [2024-11-14 03:15:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:15:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 03:15:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:55,741 INFO L225 Difference]: With dead ends: 11739 [2024-11-14 03:15:55,741 INFO L226 Difference]: Without dead ends: 8658 [2024-11-14 03:15:55,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:15:55,749 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:55,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8658 states. [2024-11-14 03:15:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8658 to 8658. [2024-11-14 03:15:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8658 states, 8657 states have (on average 4.122790805128798) internal successors, (35691), 8657 states have internal predecessors, (35691), 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 03:15:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8658 states to 8658 states and 35691 transitions. [2024-11-14 03:15:56,019 INFO L78 Accepts]: Start accepts. Automaton has 8658 states and 35691 transitions. Word has length 12 [2024-11-14 03:15:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:56,019 INFO L471 AbstractCegarLoop]: Abstraction has 8658 states and 35691 transitions. [2024-11-14 03:15:56,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8658 states and 35691 transitions. [2024-11-14 03:15:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:15:56,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:56,341 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:56,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:15:56,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:15:56,546 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:56,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1650084120, now seen corresponding path program 1 times [2024-11-14 03:15:56,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:56,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471704243] [2024-11-14 03:15:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:56,843 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 03:15:56,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:56,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471704243] [2024-11-14 03:15:56,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471704243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:56,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:56,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:15:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693252397] [2024-11-14 03:15:56,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:56,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:56,848 INFO L87 Difference]: Start difference. First operand 8658 states and 35691 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:57,164 INFO L93 Difference]: Finished difference Result 11592 states and 47988 transitions. [2024-11-14 03:15:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:15:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 03:15:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:57,221 INFO L225 Difference]: With dead ends: 11592 [2024-11-14 03:15:57,221 INFO L226 Difference]: Without dead ends: 7995 [2024-11-14 03:15:57,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:15:57,229 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:57,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 47 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2024-11-14 03:15:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7153. [2024-11-14 03:15:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7153 states, 7152 states have (on average 4.233640939597316) internal successors, (30279), 7152 states have internal predecessors, (30279), 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 03:15:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7153 states to 7153 states and 30279 transitions. [2024-11-14 03:15:57,427 INFO L78 Accepts]: Start accepts. Automaton has 7153 states and 30279 transitions. Word has length 29 [2024-11-14 03:15:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:57,427 INFO L471 AbstractCegarLoop]: Abstraction has 7153 states and 30279 transitions. [2024-11-14 03:15:57,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7153 states and 30279 transitions. [2024-11-14 03:15:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:15:57,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:57,448 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:57,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:15:57,448 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:57,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 33776608, now seen corresponding path program 1 times [2024-11-14 03:15:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706255954] [2024-11-14 03:15:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:15:57,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706255954] [2024-11-14 03:15:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706255954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:57,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:57,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:15:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452973264] [2024-11-14 03:15:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:57,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:57,773 INFO L87 Difference]: Start difference. First operand 7153 states and 30279 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 03:15:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:58,151 INFO L93 Difference]: Finished difference Result 12351 states and 52636 transitions. [2024-11-14 03:15:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:15:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 03:15:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:58,242 INFO L225 Difference]: With dead ends: 12351 [2024-11-14 03:15:58,242 INFO L226 Difference]: Without dead ends: 11185 [2024-11-14 03:15:58,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:15:58,250 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:58,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 60 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11185 states. [2024-11-14 03:15:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11185 to 8605. [2024-11-14 03:15:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8605 states, 8604 states have (on average 4.238726173872617) internal successors, (36470), 8604 states have internal predecessors, (36470), 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 03:15:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8605 states to 8605 states and 36470 transitions. [2024-11-14 03:15:58,590 INFO L78 Accepts]: Start accepts. Automaton has 8605 states and 36470 transitions. Word has length 35 [2024-11-14 03:15:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:58,590 INFO L471 AbstractCegarLoop]: Abstraction has 8605 states and 36470 transitions. [2024-11-14 03:15:58,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 03:15:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8605 states and 36470 transitions. [2024-11-14 03:15:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:15:58,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:58,612 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:58,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:15:58,613 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:15:58,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -127329760, now seen corresponding path program 2 times [2024-11-14 03:15:58,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:58,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673804056] [2024-11-14 03:15:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:15:58,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673804056] [2024-11-14 03:15:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673804056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440605890] [2024-11-14 03:15:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:58,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:58,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:15:59,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:15:59,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:59,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:15:59,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:15:59,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:15:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440605890] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:59,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:15:59,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-14 03:15:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115273982] [2024-11-14 03:15:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:59,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:15:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:15:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:15:59,453 INFO L87 Difference]: Start difference. First operand 8605 states and 36470 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 03:16:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:00,015 INFO L93 Difference]: Finished difference Result 13675 states and 58036 transitions. [2024-11-14 03:16:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:16:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 03:16:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:00,094 INFO L225 Difference]: With dead ends: 13675 [2024-11-14 03:16:00,094 INFO L226 Difference]: Without dead ends: 12917 [2024-11-14 03:16:00,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:16:00,099 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:00,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:16:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12917 states. [2024-11-14 03:16:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12917 to 9649. [2024-11-14 03:16:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9649 states, 9648 states have (on average 4.23922056384743) internal successors, (40900), 9648 states have internal predecessors, (40900), 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 03:16:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 40900 transitions. [2024-11-14 03:16:00,509 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 40900 transitions. Word has length 35 [2024-11-14 03:16:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:00,510 INFO L471 AbstractCegarLoop]: Abstraction has 9649 states and 40900 transitions. [2024-11-14 03:16:00,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 03:16:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 40900 transitions. [2024-11-14 03:16:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:16:00,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:00,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:00,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:16:00,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:16:00,743 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:00,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash 82735808, now seen corresponding path program 3 times [2024-11-14 03:16:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196186195] [2024-11-14 03:16:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 03:16:00,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 03:16:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 03:16:00,853 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 03:16:00,854 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 03:16:00,855 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2024-11-14 03:16:00,857 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2024-11-14 03:16:00,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2024-11-14 03:16:00,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2024-11-14 03:16:00,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2024-11-14 03:16:00,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2024-11-14 03:16:00,858 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (14 of 26 remaining) [2024-11-14 03:16:00,859 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 26 remaining) [2024-11-14 03:16:00,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2024-11-14 03:16:00,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 26 remaining) [2024-11-14 03:16:00,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 26 remaining) [2024-11-14 03:16:00,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2024-11-14 03:16:00,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 26 remaining) [2024-11-14 03:16:00,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 26 remaining) [2024-11-14 03:16:00,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 26 remaining) [2024-11-14 03:16:00,862 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 26 remaining) [2024-11-14 03:16:00,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:16:00,867 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:01,012 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-14 03:16:01,012 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:16:01,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:16:01 BasicIcfg [2024-11-14 03:16:01,018 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:16:01,019 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:16:01,019 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:16:01,020 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:16:01,021 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:29" (3/4) ... [2024-11-14 03:16:01,024 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-14 03:16:01,025 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:16:01,026 INFO L158 Benchmark]: Toolchain (without parser) took 34174.87ms. Allocated memory was 117.4MB in the beginning and 8.4GB in the end (delta: 8.2GB). Free memory was 91.9MB in the beginning and 7.0GB in the end (delta: -6.9GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-14 03:16:01,027 INFO L158 Benchmark]: CDTParser took 1.27ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:16:01,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 492.80ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 78.8MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:16:01,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.65ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 76.1MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:16:01,029 INFO L158 Benchmark]: Boogie Preprocessor took 80.92ms. Allocated memory is still 117.4MB. Free memory was 76.1MB in the beginning and 74.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:16:01,030 INFO L158 Benchmark]: RCFGBuilder took 1898.96ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 85.4MB in the end (delta: -11.1MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2024-11-14 03:16:01,031 INFO L158 Benchmark]: TraceAbstraction took 31600.98ms. Allocated memory was 117.4MB in the beginning and 8.4GB in the end (delta: 8.2GB). Free memory was 84.5MB in the beginning and 7.0GB in the end (delta: -6.9GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-14 03:16:01,031 INFO L158 Benchmark]: Witness Printer took 5.96ms. Allocated memory is still 8.4GB. Free memory was 7.0GB in the beginning and 7.0GB in the end (delta: 23.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:16:01,033 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.27ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 492.80ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 78.8MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.65ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 76.1MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.92ms. Allocated memory is still 117.4MB. Free memory was 76.1MB in the beginning and 74.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1898.96ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 85.4MB in the end (delta: -11.1MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. * TraceAbstraction took 31600.98ms. Allocated memory was 117.4MB in the beginning and 8.4GB in the end (delta: 8.2GB). Free memory was 84.5MB in the beginning and 7.0GB in the end (delta: -6.9GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Witness Printer took 5.96ms. Allocated memory is still 8.4GB. Free memory was 7.0GB in the beginning and 7.0GB in the end (delta: 23.2kB). There was no memory consumed. 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 - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L40] 0 int* q1; [L41] 0 int* q2; [L42] 0 int i, j, total, C, N, M, q1_front, q1_back, q2_front, q2_back, n1, n2; [L124] 0 pthread_t t1, t2, t3, t4; [L126] 0 C = __VERIFIER_nondet_int() [L127] 0 M = __VERIFIER_nondet_int() [L128] 0 N = __VERIFIER_nondet_int() [L130] 0 q1_front = __VERIFIER_nondet_int() [L131] 0 q1_back = __VERIFIER_nondet_int() [L132] 0 q2_front = __VERIFIER_nondet_int() [L133] 0 q2_back = __VERIFIER_nondet_int() [L135] 0 n1 = __VERIFIER_nondet_int() [L136] 0 n2 = __VERIFIER_nondet_int() [L137] CALL, EXPR 0 create_fresh_int_array(n1) [L160] CALL 0 assume_abort_if_not(size >= 0) [L37] COND FALSE 0 !(!cond) [L160] RET 0 assume_abort_if_not(size >= 0) [L161] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND FALSE 0 !(!cond) [L161] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L163] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L164] 0 int i = 0; VAL [C=3, M=0, N=1, \old(size)=1, arr={-1:0}, i=0, i=0, j=0, n1=1, n2=0, q1={0:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, size=1, total=0] [L164] COND TRUE 0 i < size [L165] 0 arr[i] = __VERIFIER_nondet_int() [L164] 0 i++ VAL [C=3, M=0, N=1, \old(size)=1, arr={-1:0}, i=0, i=1, j=0, n1=1, n2=0, q1={0:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, size=1, total=0] [L164] COND FALSE 0 !(i < size) [L167] 0 return arr; [L137] RET, EXPR 0 create_fresh_int_array(n1) [L137] 0 q1 = create_fresh_int_array(n1) [L138] CALL, EXPR 0 create_fresh_int_array(n2) [L160] CALL 0 assume_abort_if_not(size >= 0) [L37] COND FALSE 0 !(!cond) [L160] RET 0 assume_abort_if_not(size >= 0) [L161] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND FALSE 0 !(!cond) [L161] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L163] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L164] 0 int i = 0; VAL [C=3, M=0, N=1, \old(size)=0, arr={-4:0}, i=0, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, size=0, total=0] [L164] COND FALSE 0 !(i < size) [L167] 0 return arr; [L138] RET, EXPR 0 create_fresh_int_array(n2) [L138] 0 q2 = create_fresh_int_array(n2) [L140] CALL 0 assume_abort_if_not(C > -2147483648) [L37] COND FALSE 0 !(!cond) [L140] RET 0 assume_abort_if_not(C > -2147483648) [L141] CALL 0 assume_abort_if_not(N > M && M >= 0 && C > 0 && q1_front == q1_back && q2_front == q2_back) [L37] COND FALSE 0 !(!cond) [L141] RET 0 assume_abort_if_not(N > M && M >= 0 && C > 0 && q1_front == q1_back && q2_front == q2_back) [L144] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [C=3, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, total=0] [L145] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [C=3, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, total=0] [L69] 2 _Bool cond = j < M; VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L71] COND FALSE 2 !(\read(cond)) [L84] 2 return 0; [L49] 1 _Bool cond = i < N; VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L51] COND TRUE 1 \read(cond) VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L146] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) VAL [C=3, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, total=0] [L147] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) VAL [C=3, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, t4=0, total=0] [L107] 4 _Bool cond = j < M || q2_front < q2_back; VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=0, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L109] COND FALSE 4 !(\read(cond)) [L120] 4 return 0; [L53] EXPR 1 q1_back >= 0 && q1_back < n1 && q1[q1_back] == C [L53] EXPR 1 q1[q1_back] [L53] EXPR 1 q1_back >= 0 && q1_back < n1 && q1[q1_back] == C [L53] CALL 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1 && q1[q1_back] == C) [L37] COND FALSE 1 !(!cond) [L53] RET 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1 && q1[q1_back] == C) [L54] 1 i++ VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L89] 3 _Bool cond = i < N || q1_front < q1_back; VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=0, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L57] 1 q1_back++ VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L60] 1 cond = i < N VAL [C=3, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] [L51] COND FALSE 1 !(\read(cond)) [L64] 1 return 0; [L148] FCALL, JOIN 1 pthread_join(t1, 0) VAL [C=3, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, t4=0, total=0] [L149] FCALL, JOIN 2 pthread_join(t2, 0) VAL [C=3, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, t4=0, total=0] [L91] COND FALSE 3 !(\read(cond)) [L102] 3 return 0; [L150] FCALL, JOIN 3 pthread_join(t3, 0) VAL [C=3, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, t4=0, total=0] [L151] FCALL, JOIN 4 pthread_join(t4, 0) VAL [C=3, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, t1=-3, t2=-2, t3=-1, t4=0, total=0] [L153] CALL 0 assume_abort_if_not(total <= 0) [L37] COND FALSE 0 !(!cond) [L153] RET 0 assume_abort_if_not(total <= 0) [L154] CALL 0 reach_error() [L21] 0 __assert_fail("0", "popl20-bad-buffer-mult-alt.wvr.c", 21, __extension__ __PRETTY_FUNCTION__) VAL [C=3, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={-1:0}, q1_back=1, q1_front=0, q2={-4:0}, q2_back=0, q2_front=0, total=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 144]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 146]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 145]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 147]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 99 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 31.2s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.5s, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 608 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 608 mSDsluCounter, 770 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 483 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1637 IncrementalHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 287 mSDtfsCounter, 1637 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16793occurred in iteration=6, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 7096 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 283 NumberOfCodeBlocks, 283 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 272 ConstructedInterpolants, 3 QuantifiedInterpolants, 2260 SizeOfPredicates, 19 NumberOfNonLiveVariables, 777 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 9/25 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-14 03:16:01,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:16:04,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:16:04,736 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2024-11-14 03:16:04,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:16:04,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:16:04,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:16:04,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:16:04,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:16:04,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:16:04,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:16:04,824 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:16:04,825 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:16:04,826 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:16:04,826 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:16:04,826 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:16:04,826 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:16:04,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:16:04,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:16:04,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:16:04,828 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:16:04,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:16:04,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:16:04,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:16:04,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:16:04,829 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:16:04,830 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:16:04,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:16:04,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:16:04,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:16:04,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:16:04,832 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 03:16:04,832 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 03:16:04,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:16:04,832 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:16:04,832 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_96968940-b67b-4bd6-8085-7c983b776c38/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 [2024-11-14 03:16:05,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:16:05,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:16:05,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:16:05,234 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:16:05,234 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:16:05,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c Unable to find full path for "g++" [2024-11-14 03:16:07,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:16:08,331 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:16:08,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-14 03:16:08,351 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/6c23e5b4e/8545655a9fe2489eb13a68902baafdae/FLAG42fcd1373 [2024-11-14 03:16:08,387 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/data/6c23e5b4e/8545655a9fe2489eb13a68902baafdae [2024-11-14 03:16:08,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:16:08,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:16:08,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:16:08,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:16:08,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:16:08,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2321e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08, skipping insertion in model container [2024-11-14 03:16:08,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,444 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:16:08,765 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 03:16:08,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:16:08,806 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:16:08,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:16:08,906 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:16:08,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08 WrapperNode [2024-11-14 03:16:08,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:16:08,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:16:08,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:16:08,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:16:08,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,977 INFO L138 Inliner]: procedures = 27, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 294 [2024-11-14 03:16:08,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:16:08,978 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:16:08,978 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:16:08,978 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:16:08,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:08,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,015 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:16:09,043 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:16:09,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:16:09,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:16:09,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (1/1) ... [2024-11-14 03:16:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:16:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:09,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:16:09,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:16:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:16:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 03:16:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-14 03:16:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-14 03:16:09,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-14 03:16:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-14 03:16:09,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-14 03:16:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-14 03:16:09,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-14 03:16:09,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:16:09,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:16:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 03:16:09,134 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-14 03:16:09,301 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:16:09,306 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:16:10,270 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-14 03:16:10,270 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:16:11,142 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:16:11,143 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:16:11,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:16:11 BoogieIcfgContainer [2024-11-14 03:16:11,146 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:16:11,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:16:11,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:16:11,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:16:11,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:16:08" (1/3) ... [2024-11-14 03:16:11,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c94eba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:16:11, skipping insertion in model container [2024-11-14 03:16:11,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:08" (2/3) ... [2024-11-14 03:16:11,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c94eba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:16:11, skipping insertion in model container [2024-11-14 03:16:11,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:16:11" (3/3) ... [2024-11-14 03:16:11,166 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt3.wvr.c [2024-11-14 03:16:11,192 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:16:11,195 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt3.wvr.c that has 5 procedures, 61 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2024-11-14 03:16:11,195 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-14 03:16:11,353 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-14 03:16:11,414 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 66 transitions, 160 flow [2024-11-14 03:16:12,584 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 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 03:16:12,629 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:16:12,650 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=None, 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;@2c108e54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:16:12,650 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-14 03:16:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 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 03:16:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:16:12,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:12,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:16:12,717 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:12,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash 860692, now seen corresponding path program 1 times [2024-11-14 03:16:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:12,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130242302] [2024-11-14 03:16:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:12,745 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 03:16:12,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:12,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:12,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:13,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:16:13,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:13,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:13,144 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 03:16:13,149 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:13,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130242302] [2024-11-14 03:16:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130242302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:13,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:13,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:16:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949943014] [2024-11-14 03:16:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:13,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:13,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:13,228 INFO L87 Difference]: Start difference. First operand has 12507 states, 12421 states have (on average 4.419209403429676) internal successors, (54891), 12506 states have internal predecessors, (54891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 03:16:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:14,028 INFO L93 Difference]: Finished difference Result 12507 states and 54891 transitions. [2024-11-14 03:16:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:14,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:16:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:14,345 INFO L225 Difference]: With dead ends: 12507 [2024-11-14 03:16:14,345 INFO L226 Difference]: Without dead ends: 12503 [2024-11-14 03:16:14,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:14,367 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:14,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:16:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12503 states. [2024-11-14 03:16:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12503 to 12503. [2024-11-14 03:16:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12420 states have (on average 4.419243156199678) internal successors, (54887), 12502 states have internal predecessors, (54887), 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 03:16:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 54887 transitions. [2024-11-14 03:16:15,820 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 54887 transitions. Word has length 3 [2024-11-14 03:16:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:15,821 INFO L471 AbstractCegarLoop]: Abstraction has 12503 states and 54887 transitions. [2024-11-14 03:16:15,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 03:16:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 54887 transitions. [2024-11-14 03:16:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:16:15,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:15,824 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:16:15,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:16,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:16,028 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:16,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 860693, now seen corresponding path program 1 times [2024-11-14 03:16:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:16,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426531392] [2024-11-14 03:16:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:16,033 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 03:16:16,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:16,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:16,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:16,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:16:16,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:16,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:16,371 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 03:16:16,372 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:16,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:16,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426531392] [2024-11-14 03:16:16,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426531392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:16,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:16,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560220174] [2024-11-14 03:16:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:16,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:16,378 INFO L87 Difference]: Start difference. First operand 12503 states and 54887 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 03:16:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:17,268 INFO L93 Difference]: Finished difference Result 12509 states and 54895 transitions. [2024-11-14 03:16:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:16:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:17,412 INFO L225 Difference]: With dead ends: 12509 [2024-11-14 03:16:17,412 INFO L226 Difference]: Without dead ends: 12507 [2024-11-14 03:16:17,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:16:17,431 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:17,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:16:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2024-11-14 03:16:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 12507. [2024-11-14 03:16:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12507 states, 12424 states have (on average 4.418303283966517) internal successors, (54893), 12506 states have internal predecessors, (54893), 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 03:16:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12507 states to 12507 states and 54893 transitions. [2024-11-14 03:16:18,357 INFO L78 Accepts]: Start accepts. Automaton has 12507 states and 54893 transitions. Word has length 3 [2024-11-14 03:16:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:18,357 INFO L471 AbstractCegarLoop]: Abstraction has 12507 states and 54893 transitions. [2024-11-14 03:16:18,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 03:16:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12507 states and 54893 transitions. [2024-11-14 03:16:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:16:18,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:18,359 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 03:16:18,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:18,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:18,561 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:18,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 827154440, now seen corresponding path program 1 times [2024-11-14 03:16:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066972315] [2024-11-14 03:16:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:18,565 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 03:16:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:18,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:18,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:16:18,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:18,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:19,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:19,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066972315] [2024-11-14 03:16:19,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066972315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605824594] [2024-11-14 03:16:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:19,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:16:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:16:19,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:16:19,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-14 03:16:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:19,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:16:19,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:19,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:20,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605824594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238500643] [2024-11-14 03:16:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:20,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:20,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:20,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:20,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:16:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:20,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:16:20,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:20,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:20,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238500643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:20,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:16:20,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2024-11-14 03:16:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534527758] [2024-11-14 03:16:20,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:20,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:16:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:16:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:16:20,722 INFO L87 Difference]: Start difference. First operand 12507 states and 54893 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:22,956 INFO L93 Difference]: Finished difference Result 12521 states and 54917 transitions. [2024-11-14 03:16:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:16:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:16:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:23,129 INFO L225 Difference]: With dead ends: 12521 [2024-11-14 03:16:23,129 INFO L226 Difference]: Without dead ends: 12519 [2024-11-14 03:16:23,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:16:23,142 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:23,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 53 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:16:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12519 states. [2024-11-14 03:16:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 12519. [2024-11-14 03:16:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12519 states, 12436 states have (on average 4.415487294950145) internal successors, (54911), 12518 states have internal predecessors, (54911), 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 03:16:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 54911 transitions. [2024-11-14 03:16:24,114 INFO L78 Accepts]: Start accepts. Automaton has 12519 states and 54911 transitions. Word has length 5 [2024-11-14 03:16:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:24,115 INFO L471 AbstractCegarLoop]: Abstraction has 12519 states and 54911 transitions. [2024-11-14 03:16:24,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 12519 states and 54911 transitions. [2024-11-14 03:16:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:16:24,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:24,116 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:24,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:24,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:16:24,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:24,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:16:24,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:24,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1350070845, now seen corresponding path program 1 times [2024-11-14 03:16:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234732789] [2024-11-14 03:16:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:24,721 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 03:16:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:24,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:24,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:24,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:16:24,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:24,929 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 03:16:24,929 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:24,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234732789] [2024-11-14 03:16:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234732789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015082982] [2024-11-14 03:16:24,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:24,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:24,932 INFO L87 Difference]: Start difference. First operand 12519 states and 54911 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:16:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:25,692 INFO L93 Difference]: Finished difference Result 28899 states and 130118 transitions. [2024-11-14 03:16:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 03:16:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:26,091 INFO L225 Difference]: With dead ends: 28899 [2024-11-14 03:16:26,092 INFO L226 Difference]: Without dead ends: 17072 [2024-11-14 03:16:26,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:26,126 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:26,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:16:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2024-11-14 03:16:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 16818. [2024-11-14 03:16:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16818 states, 16711 states have (on average 4.3292442104003355) internal successors, (72346), 16817 states have internal predecessors, (72346), 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 03:16:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16818 states to 16818 states and 72346 transitions. [2024-11-14 03:16:27,137 INFO L78 Accepts]: Start accepts. Automaton has 16818 states and 72346 transitions. Word has length 8 [2024-11-14 03:16:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:27,140 INFO L471 AbstractCegarLoop]: Abstraction has 16818 states and 72346 transitions. [2024-11-14 03:16:27,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:16:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16818 states and 72346 transitions. [2024-11-14 03:16:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:16:27,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:27,142 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:27,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Ended with exit code 0 [2024-11-14 03:16:27,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:27,343 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:27,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -57733200, now seen corresponding path program 1 times [2024-11-14 03:16:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359419683] [2024-11-14 03:16:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:27,345 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 03:16:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:27,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:27,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (8)] Waiting until timeout for monitored process [2024-11-14 03:16:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:27,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:16:27,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:27,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:27,570 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 03:16:27,571 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 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 03:16:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:27,657 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:27,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359419683] [2024-11-14 03:16:27,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359419683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:27,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:27,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424025875] [2024-11-14 03:16:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:27,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:27,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:27,659 INFO L87 Difference]: Start difference. First operand 16818 states and 72346 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:16:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:28,175 INFO L93 Difference]: Finished difference Result 16818 states and 72346 transitions. [2024-11-14 03:16:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:16:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:16:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:28,353 INFO L225 Difference]: With dead ends: 16818 [2024-11-14 03:16:28,353 INFO L226 Difference]: Without dead ends: 14126 [2024-11-14 03:16:28,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:16:28,371 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:28,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:16:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14126 states. [2024-11-14 03:16:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14126 to 14126. [2024-11-14 03:16:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14126 states, 14064 states have (on average 4.298634812286689) internal successors, (60456), 14125 states have internal predecessors, (60456), 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 03:16:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 60456 transitions. [2024-11-14 03:16:29,333 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 60456 transitions. Word has length 10 [2024-11-14 03:16:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:29,334 INFO L471 AbstractCegarLoop]: Abstraction has 14126 states and 60456 transitions. [2024-11-14 03:16:29,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:16:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 60456 transitions. [2024-11-14 03:16:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:16:29,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:29,338 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:29,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:29,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:29,539 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:29,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash -57733199, now seen corresponding path program 1 times [2024-11-14 03:16:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:29,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879196266] [2024-11-14 03:16:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:29,544 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 03:16:29,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:29,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:29,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (9)] Waiting until timeout for monitored process [2024-11-14 03:16:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:29,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:16:29,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:29,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:29,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:16:30,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:16:30,162 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 03:16:30,163 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 13 treesize of output 13 [2024-11-14 03:16:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:30,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:31,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879196266] [2024-11-14 03:16:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879196266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1146862029] [2024-11-14 03:16:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:16:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:16:31,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:16:31,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-14 03:16:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:32,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:16:32,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:32,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:32,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:16:32,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:16:32,903 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 03:16:32,903 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 13 treesize of output 13 [2024-11-14 03:16:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:33,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1146862029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507038340] [2024-11-14 03:16:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:33,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:33,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:16:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:34,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:16:34,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:34,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:34,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:16:34,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:16:34,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 03:16:34,232 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 13 treesize of output 13 [2024-11-14 03:16:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:34,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507038340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:35,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:16:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2024-11-14 03:16:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273570503] [2024-11-14 03:16:35,125 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:35,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:16:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:16:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:16:35,127 INFO L87 Difference]: Start difference. First operand 14126 states and 60456 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:43,074 INFO L93 Difference]: Finished difference Result 31388 states and 138220 transitions. [2024-11-14 03:16:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:16:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:16:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:43,323 INFO L225 Difference]: With dead ends: 31388 [2024-11-14 03:16:43,323 INFO L226 Difference]: Without dead ends: 29020 [2024-11-14 03:16:43,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:16:43,350 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:43,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 130 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-14 03:16:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29020 states. [2024-11-14 03:16:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29020 to 21319. [2024-11-14 03:16:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21319 states, 21257 states have (on average 4.345062802841417) internal successors, (92363), 21318 states have internal predecessors, (92363), 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 03:16:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21319 states to 21319 states and 92363 transitions. [2024-11-14 03:16:44,491 INFO L78 Accepts]: Start accepts. Automaton has 21319 states and 92363 transitions. Word has length 10 [2024-11-14 03:16:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:44,491 INFO L471 AbstractCegarLoop]: Abstraction has 21319 states and 92363 transitions. [2024-11-14 03:16:44,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21319 states and 92363 transitions. [2024-11-14 03:16:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:16:44,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:44,496 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:44,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-14 03:16:44,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (9)] Ended with exit code 0 [2024-11-14 03:16:44,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:16:45,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:45,100 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:45,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash -878899686, now seen corresponding path program 1 times [2024-11-14 03:16:45,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750198372] [2024-11-14 03:16:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:45,101 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 03:16:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:45,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:45,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Waiting until timeout for monitored process [2024-11-14 03:16:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:45,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:16:45,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:45,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:16:45,270 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 03:16:45,271 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:45,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:45,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750198372] [2024-11-14 03:16:45,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750198372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:45,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:45,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205146381] [2024-11-14 03:16:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:45,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:45,274 INFO L87 Difference]: Start difference. First operand 21319 states and 92363 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:16:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:45,913 INFO L93 Difference]: Finished difference Result 21319 states and 92363 transitions. [2024-11-14 03:16:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:45,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:16:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:46,031 INFO L225 Difference]: With dead ends: 21319 [2024-11-14 03:16:46,031 INFO L226 Difference]: Without dead ends: 16892 [2024-11-14 03:16:46,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:46,049 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:46,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:16:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16892 states. [2024-11-14 03:16:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16892 to 16892. [2024-11-14 03:16:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16892 states, 16865 states have (on average 4.3264749481174025) internal successors, (72966), 16891 states have internal predecessors, (72966), 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 03:16:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16892 states to 16892 states and 72966 transitions. [2024-11-14 03:16:46,984 INFO L78 Accepts]: Start accepts. Automaton has 16892 states and 72966 transitions. Word has length 10 [2024-11-14 03:16:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:46,985 INFO L471 AbstractCegarLoop]: Abstraction has 16892 states and 72966 transitions. [2024-11-14 03:16:46,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:16:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 16892 states and 72966 transitions. [2024-11-14 03:16:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:16:46,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:46,987 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:46,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Ended with exit code 0 [2024-11-14 03:16:47,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:47,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:47,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -878899685, now seen corresponding path program 1 times [2024-11-14 03:16:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803134231] [2024-11-14 03:16:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,188 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 03:16:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:47,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:47,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:47,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:16:47,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:47,396 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 03:16:47,397 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:47,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803134231] [2024-11-14 03:16:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803134231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009624046] [2024-11-14 03:16:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:47,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:47,399 INFO L87 Difference]: Start difference. First operand 16892 states and 72966 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:16:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:48,134 INFO L93 Difference]: Finished difference Result 40073 states and 176124 transitions. [2024-11-14 03:16:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:48,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:16:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:48,284 INFO L225 Difference]: With dead ends: 40073 [2024-11-14 03:16:48,284 INFO L226 Difference]: Without dead ends: 23048 [2024-11-14 03:16:48,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:48,315 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:48,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 55 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:16:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23048 states. [2024-11-14 03:16:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23048 to 22790. [2024-11-14 03:16:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22790 states, 22754 states have (on average 4.234464270018458) internal successors, (96351), 22789 states have internal predecessors, (96351), 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 03:16:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22790 states to 22790 states and 96351 transitions. [2024-11-14 03:16:49,580 INFO L78 Accepts]: Start accepts. Automaton has 22790 states and 96351 transitions. Word has length 10 [2024-11-14 03:16:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:49,581 INFO L471 AbstractCegarLoop]: Abstraction has 22790 states and 96351 transitions. [2024-11-14 03:16:49,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 03:16:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 22790 states and 96351 transitions. [2024-11-14 03:16:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:16:49,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:49,583 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-11-14 03:16:49,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Ended with exit code 0 [2024-11-14 03:16:49,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:49,784 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:16:49,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1637397857, now seen corresponding path program 2 times [2024-11-14 03:16:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:16:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76598065] [2024-11-14 03:16:49,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:16:49,785 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 03:16:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:16:49,788 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:16:49,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (14)] Waiting until timeout for monitored process [2024-11-14 03:16:49,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:16:49,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:49,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:16:49,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:49,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:50,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:51,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:16:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76598065] [2024-11-14 03:16:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76598065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1851176994] [2024-11-14 03:16:51,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:16:51,107 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:16:51,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:16:51,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:16:51,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-14 03:16:51,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:16:51,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:51,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:16:51,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:51,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:51,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:52,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1851176994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411761816] [2024-11-14 03:16:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:16:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:52,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:52,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:16:52,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 03:16:52,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:52,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:16:52,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:52,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:16:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:53,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411761816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:53,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:16:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2024-11-14 03:16:53,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935593784] [2024-11-14 03:16:53,336 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:53,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:16:53,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:16:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:16:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:16:53,337 INFO L87 Difference]: Start difference. First operand 22790 states and 96351 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 03:17:00,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:01,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:03,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:05,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:08,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:10,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:12,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:16,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:18,203 INFO L93 Difference]: Finished difference Result 22841 states and 96447 transitions. [2024-11-14 03:17:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:17:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 03:17:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:18,393 INFO L225 Difference]: With dead ends: 22841 [2024-11-14 03:17:18,393 INFO L226 Difference]: Without dead ends: 22839 [2024-11-14 03:17:18,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=864, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:17:18,406 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 142 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:18,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 534 Invalid, 3 Unknown, 0 Unchecked, 20.8s Time] [2024-11-14 03:17:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22839 states. [2024-11-14 03:17:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22839 to 22838. [2024-11-14 03:17:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22838 states, 22802 states have (on average 4.228839575475836) internal successors, (96426), 22837 states have internal predecessors, (96426), 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 03:17:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22838 states to 22838 states and 96426 transitions. [2024-11-14 03:17:19,464 INFO L78 Accepts]: Start accepts. Automaton has 22838 states and 96426 transitions. Word has length 11 [2024-11-14 03:17:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:19,465 INFO L471 AbstractCegarLoop]: Abstraction has 22838 states and 96426 transitions. [2024-11-14 03:17:19,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 03:17:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22838 states and 96426 transitions. [2024-11-14 03:17:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:17:19,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:19,466 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:19,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:17:19,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (14)] Ended with exit code 0 [2024-11-14 03:17:19,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:20,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:17:20,068 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:17:20,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 740562289, now seen corresponding path program 1 times [2024-11-14 03:17:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:17:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745638220] [2024-11-14 03:17:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:20,069 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 03:17:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:17:20,072 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:20,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (17)] Waiting until timeout for monitored process [2024-11-14 03:17:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:20,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:17:20,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:20,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:20,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:21,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:17:21,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745638220] [2024-11-14 03:17:21,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745638220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:21,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [196426794] [2024-11-14 03:17:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:17:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:17:21,525 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:17:21,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-14 03:17:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:21,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:17:21,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:21,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:22,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:23,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [196426794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:23,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530525330] [2024-11-14 03:17:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:23,155 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:23,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:17:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:23,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:17:23,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:23,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:23,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:24,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530525330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:24,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:17:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2024-11-14 03:17:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979487389] [2024-11-14 03:17:24,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:24,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:17:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:17:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:17:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:17:24,160 INFO L87 Difference]: Start difference. First operand 22838 states and 96426 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 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 03:17:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:28,567 INFO L93 Difference]: Finished difference Result 52883 states and 229386 transitions. [2024-11-14 03:17:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:17:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 03:17:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:28,922 INFO L225 Difference]: With dead ends: 52883 [2024-11-14 03:17:28,923 INFO L226 Difference]: Without dead ends: 47120 [2024-11-14 03:17:28,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:17:28,950 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 218 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:28,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 196 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:17:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47120 states. [2024-11-14 03:17:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47120 to 34592. [2024-11-14 03:17:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34592 states, 34556 states have (on average 4.275321217733534) internal successors, (147738), 34591 states have internal predecessors, (147738), 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 03:17:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34592 states to 34592 states and 147738 transitions. [2024-11-14 03:17:30,476 INFO L78 Accepts]: Start accepts. Automaton has 34592 states and 147738 transitions. Word has length 12 [2024-11-14 03:17:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:30,476 INFO L471 AbstractCegarLoop]: Abstraction has 34592 states and 147738 transitions. [2024-11-14 03:17:30,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 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 03:17:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34592 states and 147738 transitions. [2024-11-14 03:17:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:17:30,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:30,482 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:30,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (17)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:30,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-14 03:17:30,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:17:31,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:31,083 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:17:31,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -420468232, now seen corresponding path program 2 times [2024-11-14 03:17:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:17:31,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724921644] [2024-11-14 03:17:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:17:31,084 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 03:17:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:17:31,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:31,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (20)] Waiting until timeout for monitored process [2024-11-14 03:17:31,237 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 03:17:31,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:31,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:17:31,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:31,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-14 03:17:31,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:31,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:17:31,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:17:31,614 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 03:17:31,615 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 13 treesize of output 13 [2024-11-14 03:17:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:17:31,739 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:17:31,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:17:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724921644] [2024-11-14 03:17:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724921644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:17:31,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:17:31,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:17:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337215295] [2024-11-14 03:17:31,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:17:31,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:17:31,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:17:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:17:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:17:31,742 INFO L87 Difference]: Start difference. First operand 34592 states and 147738 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:17:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:32,996 INFO L93 Difference]: Finished difference Result 34592 states and 147738 transitions. [2024-11-14 03:17:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:17:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:17:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:33,251 INFO L225 Difference]: With dead ends: 34592 [2024-11-14 03:17:33,251 INFO L226 Difference]: Without dead ends: 29577 [2024-11-14 03:17:33,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:17:33,272 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:33,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:33,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29577 states. [2024-11-14 03:17:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29577 to 17867. [2024-11-14 03:17:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17867 states, 17852 states have (on average 4.196840690118754) internal successors, (74922), 17866 states have internal predecessors, (74922), 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 03:17:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17867 states to 17867 states and 74922 transitions. [2024-11-14 03:17:34,317 INFO L78 Accepts]: Start accepts. Automaton has 17867 states and 74922 transitions. Word has length 16 [2024-11-14 03:17:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:34,318 INFO L471 AbstractCegarLoop]: Abstraction has 17867 states and 74922 transitions. [2024-11-14 03:17:34,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:17:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 17867 states and 74922 transitions. [2024-11-14 03:17:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:17:34,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:34,333 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:34,678 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (20)] Forcibly destroying the process [2024-11-14 03:17:34,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (20)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:34,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:34,680 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:17:34,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1672198771, now seen corresponding path program 2 times [2024-11-14 03:17:34,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:17:34,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543592914] [2024-11-14 03:17:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 03:17:34,682 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 03:17:34,682 WARN L724 oredProcess$PipePump]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (20)] The stream was forcibly closed: stdIn [2024-11-14 03:17:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:17:34,685 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:34,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (21)] Waiting until timeout for monitored process [2024-11-14 03:17:34,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 03:17:34,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:34,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:17:34,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:34,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:17:35,132 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:17:35,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:17:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543592914] [2024-11-14 03:17:35,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543592914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:17:35,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:17:35,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:17:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318767436] [2024-11-14 03:17:35,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:17:35,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:17:35,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:17:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:17:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:17:35,134 INFO L87 Difference]: Start difference. First operand 17867 states and 74922 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:35,496 INFO L93 Difference]: Finished difference Result 17867 states and 74922 transitions. [2024-11-14 03:17:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:17:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 03:17:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:35,617 INFO L225 Difference]: With dead ends: 17867 [2024-11-14 03:17:35,617 INFO L226 Difference]: Without dead ends: 14786 [2024-11-14 03:17:35,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:17:35,632 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:35,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:17:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2024-11-14 03:17:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 8717. [2024-11-14 03:17:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8717 states, 8714 states have (on average 4.106036263484048) internal successors, (35780), 8716 states have internal predecessors, (35780), 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 03:17:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 35780 transitions. [2024-11-14 03:17:35,919 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 35780 transitions. Word has length 18 [2024-11-14 03:17:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:35,919 INFO L471 AbstractCegarLoop]: Abstraction has 8717 states and 35780 transitions. [2024-11-14 03:17:35,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 35780 transitions. [2024-11-14 03:17:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:17:35,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:35,936 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2024-11-14 03:17:35,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (21)] Ended with exit code 0 [2024-11-14 03:17:36,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:36,137 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:17:36,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1830228384, now seen corresponding path program 1 times [2024-11-14 03:17:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:17:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320102419] [2024-11-14 03:17:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:36,139 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 03:17:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:17:36,141 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:36,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:17:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:36,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:17:36,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:36,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:37,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:39,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:17:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320102419] [2024-11-14 03:17:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320102419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616219810] [2024-11-14 03:17:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:17:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:17:39,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:17:39,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-14 03:17:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:40,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:17:40,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:40,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:41,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1616219810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:42,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338093045] [2024-11-14 03:17:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:42,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:42,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:42,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:17:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:42,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:17:42,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:42,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:17:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:42,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338093045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:43,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:17:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 11, 11] total 30 [2024-11-14 03:17:43,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986875201] [2024-11-14 03:17:43,545 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:43,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:17:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:17:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:17:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:17:43,547 INFO L87 Difference]: Start difference. First operand 8717 states and 35780 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 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 03:17:52,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:54,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:56,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:57,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:17:59,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:18:01,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:18:03,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:18:05,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:18:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:17,493 INFO L93 Difference]: Finished difference Result 8753 states and 35848 transitions. [2024-11-14 03:18:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 03:18:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 03:18:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:17,561 INFO L225 Difference]: With dead ends: 8753 [2024-11-14 03:18:17,561 INFO L226 Difference]: Without dead ends: 8751 [2024-11-14 03:18:17,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:18:17,565 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 92 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:17,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 189 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 914 Invalid, 7 Unknown, 0 Unchecked, 19.4s Time] [2024-11-14 03:18:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2024-11-14 03:18:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 8751. [2024-11-14 03:18:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8748 states have (on average 4.095679012345679) internal successors, (35829), 8750 states have internal predecessors, (35829), 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 03:18:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 35829 transitions. [2024-11-14 03:18:17,848 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 35829 transitions. Word has length 20 [2024-11-14 03:18:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:17,848 INFO L471 AbstractCegarLoop]: Abstraction has 8751 states and 35829 transitions. [2024-11-14 03:18:17,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 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 03:18:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 35829 transitions. [2024-11-14 03:18:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:18:17,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:17,883 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 1, 1] [2024-11-14 03:18:17,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:18,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-14 03:18:18,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Ended with exit code 0 [2024-11-14 03:18:18,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:18:18,485 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:18:18,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1060322746, now seen corresponding path program 3 times [2024-11-14 03:18:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:18:18,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649953046] [2024-11-14 03:18:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:18,486 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 03:18:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:18:18,494 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:18:18,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:18:18,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:18:18,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:18,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:18:18,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:18,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:18:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:20,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:25,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:18:25,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649953046] [2024-11-14 03:18:25,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649953046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:25,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1613348343] [2024-11-14 03:18:25,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:25,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 03:18:25,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 03:18:25,358 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 03:18:25,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-14 03:18:25,849 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:18:25,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:25,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:18:25,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:25,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:18:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:26,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1613348343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13940715] [2024-11-14 03:18:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:32,530 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:32,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:18:33,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:18:33,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:33,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:18:33,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:33,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2024-11-14 03:18:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:33,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13940715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:34,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 03:18:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 37 [2024-11-14 03:18:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912592088] [2024-11-14 03:18:34,880 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:34,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 03:18:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:18:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 03:18:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:18:34,883 INFO L87 Difference]: Start difference. First operand 8751 states and 35829 transitions. Second operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 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 03:18:57,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:18:59,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:01,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:03,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:05,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:07,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:09,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:11,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:13,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:15,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:17,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:19,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:21,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:23,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:25,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:27,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:29,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:31,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:33,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:35,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:19:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:57,707 INFO L93 Difference]: Finished difference Result 8778 states and 35881 transitions. [2024-11-14 03:19:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 03:19:57,708 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 03:19:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:57,771 INFO L225 Difference]: With dead ends: 8778 [2024-11-14 03:19:57,771 INFO L226 Difference]: Without dead ends: 8777 [2024-11-14 03:19:57,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=1591, Invalid=3665, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 03:19:57,776 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 297 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:57,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 308 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1523 Invalid, 20 Unknown, 0 Unchecked, 48.8s Time] [2024-11-14 03:19:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2024-11-14 03:19:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 8777. [2024-11-14 03:19:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8777 states, 8774 states have (on average 4.0879872350125375) internal successors, (35868), 8776 states have internal predecessors, (35868), 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 03:19:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8777 states to 8777 states and 35868 transitions. [2024-11-14 03:19:58,126 INFO L78 Accepts]: Start accepts. Automaton has 8777 states and 35868 transitions. Word has length 25 [2024-11-14 03:19:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:58,126 INFO L471 AbstractCegarLoop]: Abstraction has 8777 states and 35868 transitions. [2024-11-14 03:19:58,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 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 03:19:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8777 states and 35868 transitions. [2024-11-14 03:19:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:19:58,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:58,162 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:58,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Forceful destruction successful, exit code 0 [2024-11-14 03:19:58,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:19:58,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2024-11-14 03:19:58,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 03:19:58,764 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:19:58,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1047688106, now seen corresponding path program 1 times [2024-11-14 03:19:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:19:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679092695] [2024-11-14 03:19:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:58,765 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 03:19:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:19:58,768 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:19:58,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:19:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:58,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:19:58,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:59,097 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 03:19:59,098 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:19:59,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 03:19:59,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679092695] [2024-11-14 03:19:59,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679092695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:19:59,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:19:59,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:19:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169116537] [2024-11-14 03:19:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:19:59,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:19:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 03:19:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:19:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:19:59,100 INFO L87 Difference]: Start difference. First operand 8777 states and 35868 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:59,826 INFO L93 Difference]: Finished difference Result 16529 states and 70273 transitions. [2024-11-14 03:19:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:19:59,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 03:19:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:59,915 INFO L225 Difference]: With dead ends: 16529 [2024-11-14 03:19:59,915 INFO L226 Difference]: Without dead ends: 9267 [2024-11-14 03:19:59,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:19:59,932 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:59,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 84 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:19:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2024-11-14 03:20:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 7775. [2024-11-14 03:20:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7772 states have (on average 4.114899639732372) internal successors, (31981), 7774 states have internal predecessors, (31981), 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 03:20:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 31981 transitions. [2024-11-14 03:20:00,297 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 31981 transitions. Word has length 29 [2024-11-14 03:20:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:00,297 INFO L471 AbstractCegarLoop]: Abstraction has 7775 states and 31981 transitions. [2024-11-14 03:20:00,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 31981 transitions. [2024-11-14 03:20:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:20:00,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:00,323 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:00,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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)] Ended with exit code 0 [2024-11-14 03:20:00,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:20:00,524 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-14 03:20:00,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 607059588, now seen corresponding path program 1 times [2024-11-14 03:20:00,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 03:20:00,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176936623] [2024-11-14 03:20:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:00,525 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 03:20:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 03:20:00,527 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:20:00,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (29)] Waiting until timeout for monitored process [2024-11-14 03:20:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 03:20:00,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 03:20:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 03:20:00,927 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2024-11-14 03:20:00,928 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 03:20:00,929 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2024-11-14 03:20:00,931 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2024-11-14 03:20:00,932 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2024-11-14 03:20:00,932 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2024-11-14 03:20:00,932 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2024-11-14 03:20:00,932 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2024-11-14 03:20:00,932 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (14 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 26 remaining) [2024-11-14 03:20:00,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2024-11-14 03:20:00,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2024-11-14 03:20:00,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 26 remaining) [2024-11-14 03:20:00,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 26 remaining) [2024-11-14 03:20:00,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 (29)] Ended with exit code 0 [2024-11-14 03:20:01,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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 03:20:01,138 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:01,244 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-14 03:20:01,244 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:20:01,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:20:01 BasicIcfg [2024-11-14 03:20:01,249 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:20:01,249 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:20:01,250 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:20:01,250 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:20:01,253 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:16:11" (3/4) ... [2024-11-14 03:20:01,255 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-14 03:20:01,256 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:20:01,260 INFO L158 Benchmark]: Toolchain (without parser) took 232863.35ms. Allocated memory was 117.4MB in the beginning and 9.7GB in the end (delta: 9.6GB). Free memory was 92.4MB in the beginning and 7.2GB in the end (delta: -7.1GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2024-11-14 03:20:01,260 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 117.4MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:20:01,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 509.95ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 78.7MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:20:01,261 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.44ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.2MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:20:01,261 INFO L158 Benchmark]: Boogie Preprocessor took 64.53ms. Allocated memory is still 117.4MB. Free memory was 76.2MB in the beginning and 74.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:20:01,262 INFO L158 Benchmark]: RCFGBuilder took 2103.27ms. Allocated memory was 117.4MB in the beginning and 251.7MB in the end (delta: 134.2MB). Free memory was 74.3MB in the beginning and 133.9MB in the end (delta: -59.6MB). Peak memory consumption was 71.6MB. Max. memory is 16.1GB. [2024-11-14 03:20:01,262 INFO L158 Benchmark]: TraceAbstraction took 230098.34ms. Allocated memory was 251.7MB in the beginning and 9.7GB in the end (delta: 9.4GB). Free memory was 133.4MB in the beginning and 7.2GB in the end (delta: -7.0GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2024-11-14 03:20:01,263 INFO L158 Benchmark]: Witness Printer took 6.76ms. Allocated memory is still 9.7GB. Free memory was 7.2GB in the beginning and 7.2GB in the end (delta: 258.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:20:01,265 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 117.4MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 509.95ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 78.7MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.44ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.2MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 64.53ms. Allocated memory is still 117.4MB. Free memory was 76.2MB in the beginning and 74.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2103.27ms. Allocated memory was 117.4MB in the beginning and 251.7MB in the end (delta: 134.2MB). Free memory was 74.3MB in the beginning and 133.9MB in the end (delta: -59.6MB). Peak memory consumption was 71.6MB. Max. memory is 16.1GB. * TraceAbstraction took 230098.34ms. Allocated memory was 251.7MB in the beginning and 9.7GB in the end (delta: 9.4GB). Free memory was 133.4MB in the beginning and 7.2GB in the end (delta: -7.0GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. * Witness Printer took 6.76ms. Allocated memory is still 9.7GB. Free memory was 7.2GB in the beginning and 7.2GB in the end (delta: 258.0kB). Peak memory consumption was 8.4MB. 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 - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L40] 0 int* q1; [L41] 0 int* q2; [L42] 0 int i, j, total, C, N, M, q1_front, q1_back, q2_front, q2_back, n1, n2; [L124] 0 pthread_t t1, t2, t3, t4; [L126] 0 C = __VERIFIER_nondet_int() [L127] 0 M = __VERIFIER_nondet_int() [L128] 0 N = __VERIFIER_nondet_int() [L130] 0 q1_front = __VERIFIER_nondet_int() [L131] 0 q1_back = __VERIFIER_nondet_int() [L132] 0 q2_front = __VERIFIER_nondet_int() [L133] 0 q2_back = __VERIFIER_nondet_int() [L135] 0 n1 = __VERIFIER_nondet_int() [L136] 0 n2 = __VERIFIER_nondet_int() [L137] CALL, EXPR 0 create_fresh_int_array(n1) [L160] CALL 0 assume_abort_if_not(size >= 0) [L37] COND FALSE 0 !(!cond) [L160] RET 0 assume_abort_if_not(size >= 0) [L161] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND FALSE 0 !(!cond) [L161] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L163] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L164] 0 int i = 0; VAL [\old(size)=1, arr={6:0}, i=0, i=0, j=0, n1=1, q1={0:0}, q2={0:0}, size=1, total=0] [L164] COND TRUE 0 i < size [L165] 0 arr[i] = __VERIFIER_nondet_int() [L164] 0 i++ VAL [\old(size)=1, arr={6:0}, i=0, i=1, j=0, n1=1, q1={0:0}, q2={0:0}, size=1, total=0] [L164] COND FALSE 0 !(i < size) [L167] 0 return arr; [L137] RET, EXPR 0 create_fresh_int_array(n1) [L137] 0 q1 = create_fresh_int_array(n1) [L138] CALL, EXPR 0 create_fresh_int_array(n2) [L160] CALL 0 assume_abort_if_not(size >= 0) [L37] COND FALSE 0 !(!cond) [L160] RET 0 assume_abort_if_not(size >= 0) [L161] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L37] COND FALSE 0 !(!cond) [L161] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L163] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L164] 0 int i = 0; VAL [\old(size)=0, arr={3:0}, i=0, i=0, j=0, n1=1, n2=0, q1={6:0}, q2={0:0}, size=0, total=0] [L164] COND FALSE 0 !(i < size) [L167] 0 return arr; [L138] RET, EXPR 0 create_fresh_int_array(n2) [L138] 0 q2 = create_fresh_int_array(n2) [L140] CALL 0 assume_abort_if_not(C > -2147483648) [L37] COND FALSE 0 !(!cond) [L140] RET 0 assume_abort_if_not(C > -2147483648) [L141] CALL 0 assume_abort_if_not(N > M && M >= 0 && C > 0 && q1_front == q1_back && q2_front == q2_back) [L37] COND FALSE 0 !(!cond) [L141] RET 0 assume_abort_if_not(N > M && M >= 0 && C > 0 && q1_front == q1_back && q2_front == q2_back) [L144] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [C=2, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, total=0] [L145] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [C=2, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, total=0] [L69] 2 _Bool cond = j < M; VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L71] COND FALSE 2 !(\read(cond)) [L84] 2 return 0; [L146] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) VAL [C=2, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, total=0] [L147] FCALL, FORK 0 pthread_create(&t4, 0, thread4, 0) VAL [C=2, M=0, N=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, t4=2, total=0] [L107] 4 _Bool cond = j < M || q2_front < q2_back; VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L109] COND FALSE 4 !(\read(cond)) [L120] 4 return 0; [L49] 1 _Bool cond = i < N; VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L51] COND TRUE 1 \read(cond) VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=0, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L53] EXPR 1 q1_back >= 0 && q1_back < n1 && q1[q1_back] == C [L53] EXPR 1 q1[q1_back] [L53] EXPR 1 q1_back >= 0 && q1_back < n1 && q1[q1_back] == C [L53] CALL 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1 && q1[q1_back] == C) [L37] COND FALSE 1 !(!cond) [L53] RET 1 assume_abort_if_not(q1_back >= 0 && q1_back < n1 && q1[q1_back] == C) [L54] 1 i++ VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L89] 3 _Bool cond = i < N || q1_front < q1_back; VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L91] COND FALSE 3 !(\read(cond)) [L102] 3 return 0; [L57] 1 q1_back++ VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L60] 1 cond = i < N VAL [C=2, M=0, N=1, \old(_argptr)={0:0}, _argptr={0:0}, cond=0, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L51] COND FALSE 1 !(\read(cond)) [L64] 1 return 0; [L148] FCALL, JOIN 1 pthread_join(t1, 0) VAL [C=2, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, t4=2, total=0] [L149] FCALL, JOIN 2 pthread_join(t2, 0) VAL [C=2, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, t4=2, total=0] [L150] FCALL, JOIN 3 pthread_join(t3, 0) VAL [C=2, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, t4=2, total=0] [L151] FCALL, JOIN 4 pthread_join(t4, 0) VAL [C=2, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, t1=-1, t2=0, t3=1, t4=2, total=0] [L153] CALL 0 assume_abort_if_not(total <= 0) [L37] COND FALSE 0 !(!cond) [L153] RET 0 assume_abort_if_not(total <= 0) [L154] CALL 0 reach_error() [L21] 0 __assert_fail("0", "popl20-bad-buffer-mult-alt.wvr.c", 21, __extension__ __PRETTY_FUNCTION__) VAL [C=2, M=0, N=1, i=1, j=0, n1=1, n2=0, q1={6:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 145]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 147]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 144]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 146]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 99 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 229.7s, OverallIterations: 16, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.2s, AutomataDifference: 166.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 948 SdHoareTripleChecker+Valid, 103.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 948 mSDsluCounter, 1448 SdHoareTripleChecker+Invalid, 100.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1139 mSDsCounter, 606 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4640 IncrementalHoareTripleChecker+Invalid, 5276 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 606 mSolverCounterUnsat, 309 mSDtfsCounter, 4640 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 649 GetRequests, 424 SyntacticMatches, 4 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 71.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34592occurred in iteration=10, InterpolantAutomatonStates: 187, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.8s AutomataMinimizationTime, 15 MinimizatonAttempts, 40013 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 36.5s InterpolantComputationTime, 391 NumberOfCodeBlocks, 375 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 560 ConstructedInterpolants, 76 QuantifiedInterpolants, 14632 SizeOfPredicates, 56 NumberOfNonLiveVariables, 2214 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 33/1401 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-14 03:20:01,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96968940-b67b-4bd6-8085-7c983b776c38/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: UNKNOWN: Overapproximated counterexample