./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --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_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/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_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/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_7c2a5753-91d6-49b9-96de-f814edb5b1c8/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 f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:59:12,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:59:12,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:59:12,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:59:12,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:59:12,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:59:12,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:59:12,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:59:12,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:59:12,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:59:12,693 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:59:12,694 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:59:12,694 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:59:12,695 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:59:12,695 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:59:12,695 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:59:12,696 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:59:12,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:59:12,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:59:12,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:59:12,697 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:59:12,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:59:12,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:59:12,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:59:12,697 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:59:12,698 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:59:12,698 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:59:12,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:59:12,698 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:59:12,698 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:59:12,699 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:59:12,699 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:59:12,699 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:59:12,699 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:59:12,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:59:12,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:59:12,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:59:12,700 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:59:12,700 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:59:12,700 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:59:12,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:59:12,701 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:59:12,701 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:59:12,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:59:12,701 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_7c2a5753-91d6-49b9-96de-f814edb5b1c8/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 -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2024-11-14 04:59:13,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:59:13,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:59:13,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:59:13,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:59:13,094 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:59:13,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i Unable to find full path for "g++" [2024-11-14 04:59:15,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:59:15,739 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:59:15,740 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2024-11-14 04:59:15,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/data/fdbc7adfc/a73c1a2205434db58050b6fa4c6695fb/FLAGfd4202485 [2024-11-14 04:59:15,775 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/data/fdbc7adfc/a73c1a2205434db58050b6fa4c6695fb [2024-11-14 04:59:15,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:59:15,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:59:15,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:59:15,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:59:15,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:59:15,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e1c384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15, skipping insertion in model container [2024-11-14 04:59:15,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,864 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:59:16,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:59:16,358 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:59:16,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:59:16,462 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:59:16,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16 WrapperNode [2024-11-14 04:59:16,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:59:16,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:59:16,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:59:16,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:59:16,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,513 INFO L138 Inliner]: procedures = 116, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2024-11-14 04:59:16,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:59:16,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:59:16,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:59:16,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:59:16,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:59:16,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:59:16,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:59:16,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:59:16,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (1/1) ... [2024-11-14 04:59:16,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:59:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:16,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:59:16,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:59:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-14 04:59:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-14 04:59:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:59:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 04:59:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:59:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:59:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:59:16,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:59:16,792 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:59:16,794 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:59:16,825 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-14 04:59:17,347 INFO L? ?]: Removed 121 outVars from TransFormulas that were not future-live. [2024-11-14 04:59:17,347 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:59:17,420 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:59:17,420 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:59:17,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:59:17 BoogieIcfgContainer [2024-11-14 04:59:17,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:59:17,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:59:17,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:59:17,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:59:17,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:59:15" (1/3) ... [2024-11-14 04:59:17,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed56e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:59:17, skipping insertion in model container [2024-11-14 04:59:17,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:16" (2/3) ... [2024-11-14 04:59:17,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed56e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:59:17, skipping insertion in model container [2024-11-14 04:59:17,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:59:17" (3/3) ... [2024-11-14 04:59:17,434 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2024-11-14 04:59:17,452 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:59:17,454 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG dll_nondet_free_order-1.i that has 2 procedures, 132 locations, 1 initial locations, 1 loop locations, and 62 error locations. [2024-11-14 04:59:17,518 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:59:17,535 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;@3cc77d02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:59:17,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-14 04:59:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:59:17,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:17,549 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:59:17,549 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:17,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash 217605, now seen corresponding path program 1 times [2024-11-14 04:59:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:17,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448075448] [2024-11-14 04:59:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:17,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448075448] [2024-11-14 04:59:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448075448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:59:17,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362886676] [2024-11-14 04:59:17,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:17,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:17,885 INFO L87 Difference]: Start difference. First operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 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 04:59:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:18,106 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2024-11-14 04:59:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:18,109 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 04:59:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:18,117 INFO L225 Difference]: With dead ends: 128 [2024-11-14 04:59:18,117 INFO L226 Difference]: Without dead ends: 123 [2024-11-14 04:59:18,120 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 04:59:18,123 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:18,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 190 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-14 04:59:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-14 04:59:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 64 states have (on average 2.0) internal successors, (128), 122 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2024-11-14 04:59:18,183 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 3 [2024-11-14 04:59:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:18,184 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2024-11-14 04:59:18,184 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 04:59:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2024-11-14 04:59:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:59:18,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:18,186 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:59:18,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:59:18,187 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:18,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 217606, now seen corresponding path program 1 times [2024-11-14 04:59:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:18,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665916821] [2024-11-14 04:59:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:18,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665916821] [2024-11-14 04:59:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665916821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:18,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:18,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:59:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167605641] [2024-11-14 04:59:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:18,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:18,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,329 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. 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 04:59:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:18,392 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2024-11-14 04:59:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:18,393 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 04:59:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:18,394 INFO L225 Difference]: With dead ends: 120 [2024-11-14 04:59:18,394 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 04:59:18,394 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 04:59:18,395 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:18,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 214 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 04:59:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-14 04:59:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.953125) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2024-11-14 04:59:18,405 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 3 [2024-11-14 04:59:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:18,406 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2024-11-14 04:59:18,406 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 04:59:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2024-11-14 04:59:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:59:18,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:18,406 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:18,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:59:18,407 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:18,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash -895567445, now seen corresponding path program 1 times [2024-11-14 04:59:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:18,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843887968] [2024-11-14 04:59:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:18,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843887968] [2024-11-14 04:59:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843887968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:18,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:18,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:59:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22991849] [2024-11-14 04:59:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:18,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:18,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,534 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:18,578 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2024-11-14 04:59:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:18,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:59:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:18,580 INFO L225 Difference]: With dead ends: 128 [2024-11-14 04:59:18,580 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 04:59:18,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,581 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 7 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:18,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 232 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:59:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 04:59:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2024-11-14 04:59:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2024-11-14 04:59:18,591 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 7 [2024-11-14 04:59:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:18,592 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2024-11-14 04:59:18,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2024-11-14 04:59:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:59:18,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:18,593 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:18,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:59:18,594 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:18,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash -895731200, now seen corresponding path program 1 times [2024-11-14 04:59:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181870243] [2024-11-14 04:59:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:18,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181870243] [2024-11-14 04:59:18,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181870243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:18,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:18,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:59:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588418080] [2024-11-14 04:59:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:18,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,678 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:18,819 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2024-11-14 04:59:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:59:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:18,821 INFO L225 Difference]: With dead ends: 120 [2024-11-14 04:59:18,822 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 04:59:18,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,823 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 3 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:18,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 188 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 04:59:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-14 04:59:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2024-11-14 04:59:18,833 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 7 [2024-11-14 04:59:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:18,833 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2024-11-14 04:59:18,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2024-11-14 04:59:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:59:18,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:18,834 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:18,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:59:18,835 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:18,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -895731199, now seen corresponding path program 1 times [2024-11-14 04:59:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:18,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782748244] [2024-11-14 04:59:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:18,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:18,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782748244] [2024-11-14 04:59:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782748244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:18,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:18,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:59:18,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440936999] [2024-11-14 04:59:18,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:18,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:18,976 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:19,056 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2024-11-14 04:59:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:19,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:59:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:19,058 INFO L225 Difference]: With dead ends: 119 [2024-11-14 04:59:19,058 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 04:59:19,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:59:19,060 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:19,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 219 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 04:59:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-14 04:59:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 118 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2024-11-14 04:59:19,069 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 7 [2024-11-14 04:59:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:19,069 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2024-11-14 04:59:19,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2024-11-14 04:59:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:59:19,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:19,070 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:19,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:59:19,070 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:19,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1997863414, now seen corresponding path program 1 times [2024-11-14 04:59:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:19,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84029315] [2024-11-14 04:59:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:19,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84029315] [2024-11-14 04:59:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84029315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:19,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:19,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:59:19,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309647590] [2024-11-14 04:59:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:19,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:59:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:59:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:59:19,337 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 04:59:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:19,560 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2024-11-14 04:59:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:59:19,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 04:59:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:19,563 INFO L225 Difference]: With dead ends: 122 [2024-11-14 04:59:19,564 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 04:59:19,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:19,565 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:19,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 328 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 04:59:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-14 04:59:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 121 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2024-11-14 04:59:19,582 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 8 [2024-11-14 04:59:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:19,582 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2024-11-14 04:59:19,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 04:59:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2024-11-14 04:59:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:59:19,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:19,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:19,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:59:19,583 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:19,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1997863413, now seen corresponding path program 1 times [2024-11-14 04:59:19,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:19,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279894921] [2024-11-14 04:59:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:19,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279894921] [2024-11-14 04:59:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279894921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:19,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:19,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:59:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141981347] [2024-11-14 04:59:19,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:19,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:59:19,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:59:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:19,905 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:59:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:20,162 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2024-11-14 04:59:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:59:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:59:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:20,164 INFO L225 Difference]: With dead ends: 122 [2024-11-14 04:59:20,164 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 04:59:20,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:59:20,170 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:20,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 459 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 04:59:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-14 04:59:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 121 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2024-11-14 04:59:20,181 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 8 [2024-11-14 04:59:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:20,184 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2024-11-14 04:59:20,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:59:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2024-11-14 04:59:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:59:20,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:20,185 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:20,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:59:20,185 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:20,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1312572264, now seen corresponding path program 1 times [2024-11-14 04:59:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632144457] [2024-11-14 04:59:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:20,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632144457] [2024-11-14 04:59:20,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632144457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004448230] [2024-11-14 04:59:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:20,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:20,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:20,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:20,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:59:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:20,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:59:20,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:20,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:20,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004448230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:20,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504333816] [2024-11-14 04:59:20,540 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:59:20,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:20,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:20,551 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:20,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:21,725 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:37,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [504333816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:37,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2024-11-14 04:59:37,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472659906] [2024-11-14 04:59:37,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:37,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:59:37,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:59:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=80, Unknown=3, NotChecked=0, Total=110 [2024-11-14 04:59:37,610 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:40,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:59:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:43,812 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2024-11-14 04:59:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:59:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:59:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:43,814 INFO L225 Difference]: With dead ends: 118 [2024-11-14 04:59:43,815 INFO L226 Difference]: Without dead ends: 118 [2024-11-14 04:59:43,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=34, Invalid=95, Unknown=3, NotChecked=0, Total=132 [2024-11-14 04:59:43,816 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 1 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:43,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 352 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 3 Unknown, 0 Unchecked, 6.0s Time] [2024-11-14 04:59:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-14 04:59:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-11-14 04:59:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 114 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2024-11-14 04:59:43,829 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 11 [2024-11-14 04:59:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:43,829 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2024-11-14 04:59:43,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2024-11-14 04:59:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:59:43,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:43,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:43,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:59:44,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:59:44,031 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 04:59:44,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2035038979, now seen corresponding path program 1 times [2024-11-14 04:59:44,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:44,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718559432] [2024-11-14 04:59:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:44,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718559432] [2024-11-14 04:59:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718559432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043612775] [2024-11-14 04:59:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:44,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:44,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:59:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:44,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:59:44,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:44,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043612775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:44,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461198397] [2024-11-14 04:59:44,437 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:59:44,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:44,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:44,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:44,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:44,989 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:58,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [461198397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:58,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:58,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2024-11-14 04:59:58,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021062259] [2024-11-14 04:59:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:58,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:59:58,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:59:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=99, Unknown=4, NotChecked=0, Total=132 [2024-11-14 04:59:58,980 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:00:08,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 8.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:00:10,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:00:16,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:00:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:21,585 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2024-11-14 05:00:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:00:21,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 05:00:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:21,587 INFO L225 Difference]: With dead ends: 110 [2024-11-14 05:00:21,587 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 05:00:21,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=36, Invalid=116, Unknown=4, NotChecked=0, Total=156 [2024-11-14 05:00:21,588 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 16 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:21,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 387 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 605 Invalid, 4 Unknown, 0 Unchecked, 22.4s Time] [2024-11-14 05:00:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 05:00:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-14 05:00:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 109 states have internal predecessors, (115), 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 05:00:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2024-11-14 05:00:21,594 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 12 [2024-11-14 05:00:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:21,595 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2024-11-14 05:00:21,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:00:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2024-11-14 05:00:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:00:21,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:21,596 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:00:21,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:00:21,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:21,797 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:00:21,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash 988863948, now seen corresponding path program 1 times [2024-11-14 05:00:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:21,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700462370] [2024-11-14 05:00:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:21,922 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 05:00:21,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700462370] [2024-11-14 05:00:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700462370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531703108] [2024-11-14 05:00:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:21,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:21,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:21,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:00:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:22,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:00:22,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:22,120 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 05:00:22,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:22,245 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 05:00:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531703108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982637062] [2024-11-14 05:00:22,247 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:00:22,247 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:22,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:22,248 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:22,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:22,900 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:00:42,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [982637062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:42,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:00:42,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 15 [2024-11-14 05:00:42,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3611898] [2024-11-14 05:00:42,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:42,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:00:42,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:42,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:00:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=191, Unknown=4, NotChecked=0, Total=240 [2024-11-14 05:00:42,509 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:00:52,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:00:54,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:01:01,815 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2024-11-14 05:01:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:01:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 05:01:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:01:01,816 INFO L225 Difference]: With dead ends: 106 [2024-11-14 05:01:01,817 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 05:01:01,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=52, Invalid=216, Unknown=4, NotChecked=0, Total=272 [2024-11-14 05:01:01,818 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 19 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:01:01,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 351 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 740 Invalid, 3 Unknown, 0 Unchecked, 19.1s Time] [2024-11-14 05:01:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 05:01:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-14 05:01:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 105 states have internal predecessors, (111), 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 05:01:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2024-11-14 05:01:01,823 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 16 [2024-11-14 05:01:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:01:01,824 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2024-11-14 05:01:01,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:01:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2024-11-14 05:01:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:01:01,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:01:01,825 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:01:01,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:01:02,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:02,026 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:01:02,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:01:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 591219937, now seen corresponding path program 1 times [2024-11-14 05:01:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:01:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780795355] [2024-11-14 05:01:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:01:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:02,164 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 05:01:02,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:01:02,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780795355] [2024-11-14 05:01:02,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780795355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:01:02,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757063014] [2024-11-14 05:01:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:02,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:01:02,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:01:02,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:01:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:02,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:01:02,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:01:02,321 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 05:01:02,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:01:02,446 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 05:01:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757063014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:01:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760604357] [2024-11-14 05:01:02,451 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 05:01:02,451 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:01:02,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:01:02,452 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:01:02,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:01:03,047 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:01:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1760604357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:01:31,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:01:31,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [3, 3, 3] total 16 [2024-11-14 05:01:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787581685] [2024-11-14 05:01:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:01:31,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 05:01:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:01:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 05:01:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=217, Unknown=3, NotChecked=0, Total=272 [2024-11-14 05:01:31,848 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:01:34,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:38,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:41,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:43,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:45,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:51,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:01:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:01:57,991 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2024-11-14 05:01:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:01:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 17 [2024-11-14 05:01:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:01:57,992 INFO L225 Difference]: With dead ends: 104 [2024-11-14 05:01:57,992 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 05:01:57,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=59, Invalid=244, Unknown=3, NotChecked=0, Total=306 [2024-11-14 05:01:57,994 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 10 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:01:57,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 335 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 721 Invalid, 7 Unknown, 0 Unchecked, 25.9s Time] [2024-11-14 05:01:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 05:01:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-14 05:01:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.676923076923077) internal successors, (109), 103 states have internal predecessors, (109), 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 05:01:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2024-11-14 05:01:57,998 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 17 [2024-11-14 05:01:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:01:57,998 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2024-11-14 05:01:57,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:01:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2024-11-14 05:01:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:01:57,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:01:57,999 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:01:58,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:01:58,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:58,200 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:01:58,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:01:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 591182203, now seen corresponding path program 1 times [2024-11-14 05:01:58,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:01:58,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987731279] [2024-11-14 05:01:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:58,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:01:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:58,352 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 05:01:58,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:01:58,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987731279] [2024-11-14 05:01:58,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987731279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:01:58,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412332317] [2024-11-14 05:01:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:58,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:01:58,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:01:58,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:01:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:58,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:01:58,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:01:58,529 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 05:01:58,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:01:58,663 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 05:01:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412332317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:01:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444581518] [2024-11-14 05:01:58,666 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 05:01:58,666 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:01:58,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:01:58,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:01:58,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:01:59,176 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:02:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1444581518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:02:30,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:02:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [3, 3, 3] total 16 [2024-11-14 05:02:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732558488] [2024-11-14 05:02:30,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:02:30,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 05:02:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:02:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 05:02:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=212, Unknown=7, NotChecked=0, Total=272 [2024-11-14 05:02:30,905 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:02:36,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:02:38,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:02:41,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:02:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:02:47,727 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2024-11-14 05:02:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:02:47,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 17 [2024-11-14 05:02:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:02:47,728 INFO L225 Difference]: With dead ends: 102 [2024-11-14 05:02:47,729 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 05:02:47,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=60, Invalid=239, Unknown=7, NotChecked=0, Total=306 [2024-11-14 05:02:47,730 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 7 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:02:47,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 349 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 785 Invalid, 5 Unknown, 0 Unchecked, 16.6s Time] [2024-11-14 05:02:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 05:02:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-14 05:02:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.646153846153846) internal successors, (107), 101 states have internal predecessors, (107), 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 05:02:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2024-11-14 05:02:47,734 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 17 [2024-11-14 05:02:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:02:47,735 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2024-11-14 05:02:47,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:02:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2024-11-14 05:02:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:02:47,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:02:47,736 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:02:47,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:02:47,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:47,937 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:02:47,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:02:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 65293436, now seen corresponding path program 1 times [2024-11-14 05:02:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:02:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82246081] [2024-11-14 05:02:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:47,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:02:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:48,072 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 05:02:48,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:02:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82246081] [2024-11-14 05:02:48,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82246081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:02:48,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227846543] [2024-11-14 05:02:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:48,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:48,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:02:48,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:02:48,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:02:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:48,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:02:48,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:02:48,244 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 05:02:48,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:02:48,348 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 05:02:48,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227846543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:02:48,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795181097] [2024-11-14 05:02:48,350 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 05:02:48,351 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:02:48,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:02:48,351 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:02:48,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:02:48,836 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:17,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1795181097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:03:17,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:03:17,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2024-11-14 05:03:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388882333] [2024-11-14 05:03:17,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:03:17,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:03:17,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:03:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=249, Unknown=8, NotChecked=0, Total=306 [2024-11-14 05:03:17,268 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:03:20,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:03:22,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:03:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:03:31,545 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2024-11-14 05:03:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:03:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 05:03:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:03:31,546 INFO L225 Difference]: With dead ends: 101 [2024-11-14 05:03:31,547 INFO L226 Difference]: Without dead ends: 101 [2024-11-14 05:03:31,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=56, Invalid=278, Unknown=8, NotChecked=0, Total=342 [2024-11-14 05:03:31,548 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 18 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:03:31,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 341 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 887 Invalid, 6 Unknown, 0 Unchecked, 14.0s Time] [2024-11-14 05:03:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-14 05:03:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-14 05:03:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 100 states have internal predecessors, (106), 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 05:03:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2024-11-14 05:03:31,552 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 19 [2024-11-14 05:03:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:03:31,552 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2024-11-14 05:03:31,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:03:31,552 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2024-11-14 05:03:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:03:31,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:03:31,553 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:03:31,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 05:03:31,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:03:31,754 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:03:31,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:03:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 65292988, now seen corresponding path program 1 times [2024-11-14 05:03:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:03:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045856397] [2024-11-14 05:03:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:03:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:31,868 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 05:03:31,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:03:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045856397] [2024-11-14 05:03:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045856397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:03:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487865875] [2024-11-14 05:03:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:31,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:03:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:03:31,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:03:31,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:03:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:31,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:03:31,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:03:32,086 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 05:03:32,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:03:32,198 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 05:03:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487865875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:03:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066133438] [2024-11-14 05:03:32,201 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 05:03:32,201 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:03:32,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:03:32,201 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:03:32,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:03:32,749 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1066133438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:03:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:03:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2024-11-14 05:03:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61965411] [2024-11-14 05:03:55,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:03:55,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:03:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:03:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=252, Unknown=4, NotChecked=0, Total=306 [2024-11-14 05:03:55,183 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:04:04,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 8.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:04:06,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:04:07,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:04:09,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:04:12,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:04:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:21,509 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2024-11-14 05:04:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:04:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 05:04:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:21,510 INFO L225 Difference]: With dead ends: 100 [2024-11-14 05:04:21,510 INFO L226 Difference]: Without dead ends: 100 [2024-11-14 05:04:21,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=57, Invalid=281, Unknown=4, NotChecked=0, Total=342 [2024-11-14 05:04:21,511 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 11 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:21,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 304 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1010 Invalid, 4 Unknown, 0 Unchecked, 26.0s Time] [2024-11-14 05:04:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-14 05:04:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-14 05:04:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 99 states have internal predecessors, (105), 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 05:04:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2024-11-14 05:04:21,513 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 19 [2024-11-14 05:04:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:21,514 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2024-11-14 05:04:21,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:04:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2024-11-14 05:04:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:04:21,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:21,514 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] [2024-11-14 05:04:21,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:21,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 05:04:21,715 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:04:21,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2024096639, now seen corresponding path program 1 times [2024-11-14 05:04:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724361424] [2024-11-14 05:04:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:21,842 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 05:04:21,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724361424] [2024-11-14 05:04:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724361424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599357141] [2024-11-14 05:04:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:21,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:21,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:21,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:04:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:21,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:04:21,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:22,015 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 05:04:22,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:22,122 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 05:04:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599357141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227614616] [2024-11-14 05:04:22,124 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:04:22,124 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:22,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:22,124 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:22,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:22,749 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [227614616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:49,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2024-11-14 05:04:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930230733] [2024-11-14 05:04:49,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:49,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:04:49,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:04:49,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=285, Unknown=3, NotChecked=0, Total=342 [2024-11-14 05:04:49,311 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:04:57,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:05:01,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:05:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:10,438 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2024-11-14 05:05:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:05:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:05:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:10,439 INFO L225 Difference]: With dead ends: 98 [2024-11-14 05:05:10,439 INFO L226 Difference]: Without dead ends: 98 [2024-11-14 05:05:10,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2024-11-14 05:05:10,440 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:10,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 306 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 980 Invalid, 4 Unknown, 0 Unchecked, 20.8s Time] [2024-11-14 05:05:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-14 05:05:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-14 05:05:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 97 states have internal predecessors, (103), 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 05:05:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2024-11-14 05:05:10,443 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 20 [2024-11-14 05:05:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:10,443 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2024-11-14 05:05:10,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:05:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2024-11-14 05:05:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:05:10,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:10,444 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] [2024-11-14 05:05:10,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:05:10,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 05:05:10,648 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:05:10,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2024082737, now seen corresponding path program 1 times [2024-11-14 05:05:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:10,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49332412] [2024-11-14 05:05:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:10,765 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 05:05:10,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:05:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49332412] [2024-11-14 05:05:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49332412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:05:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759796484] [2024-11-14 05:05:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:10,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:10,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:10,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:05:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:10,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:05:10,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:05:10,945 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 05:05:10,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:05:11,075 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 05:05:11,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759796484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:05:11,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405146796] [2024-11-14 05:05:11,077 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:05:11,077 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:05:11,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:05:11,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:05:11,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:05:11,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:33,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [405146796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:05:33,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:33,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2024-11-14 05:05:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879155045] [2024-11-14 05:05:33,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:05:33,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:05:33,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:05:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=285, Unknown=6, NotChecked=0, Total=342 [2024-11-14 05:05:33,886 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:05:44,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:05:47,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:05:49,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:06:05,168 WARN L286 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 146 DAG size of output: 146 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:06:17,611 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 142 DAG size of output: 142 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:06:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:06:29,587 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2024-11-14 05:06:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:06:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:06:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:06:29,588 INFO L225 Difference]: With dead ends: 96 [2024-11-14 05:06:29,588 INFO L226 Difference]: Without dead ends: 96 [2024-11-14 05:06:29,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=68, Invalid=388, Unknown=6, NotChecked=0, Total=462 [2024-11-14 05:06:29,589 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 12 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:06:29,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 324 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1026 Invalid, 5 Unknown, 0 Unchecked, 33.2s Time] [2024-11-14 05:06:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-14 05:06:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-14 05:06:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 95 states have internal predecessors, (101), 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 05:06:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2024-11-14 05:06:29,596 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 20 [2024-11-14 05:06:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:06:29,596 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2024-11-14 05:06:29,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:06:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2024-11-14 05:06:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:06:29,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:06:29,597 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] [2024-11-14 05:06:29,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:06:29,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:06:29,798 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:06:29,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:06:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash -627557450, now seen corresponding path program 1 times [2024-11-14 05:06:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:06:29,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317869446] [2024-11-14 05:06:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:06:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:29,916 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 05:06:29,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:06:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317869446] [2024-11-14 05:06:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317869446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:06:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576417270] [2024-11-14 05:06:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:29,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:06:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:06:29,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:06:29,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:06:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:30,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:06:30,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:06:30,089 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 05:06:30,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:06:30,188 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 05:06:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576417270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:06:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99692597] [2024-11-14 05:06:30,189 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:06:30,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:06:30,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:06:30,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:06:30,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:06:30,668 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:06:58,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [99692597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:06:58,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:06:58,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2024-11-14 05:06:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981301858] [2024-11-14 05:06:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:06:58,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:06:58,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:06:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:06:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=282, Unknown=3, NotChecked=0, Total=342 [2024-11-14 05:06:58,682 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:07:01,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:07:08,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:07:11,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:07:16,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:07:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:07:24,452 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2024-11-14 05:07:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:07:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:07:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:07:24,453 INFO L225 Difference]: With dead ends: 94 [2024-11-14 05:07:24,453 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 05:07:24,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2024-11-14 05:07:24,454 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 5 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:07:24,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 293 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1033 Invalid, 6 Unknown, 0 Unchecked, 25.5s Time] [2024-11-14 05:07:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 05:07:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-14 05:07:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.523076923076923) internal successors, (99), 93 states have internal predecessors, (99), 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 05:07:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2024-11-14 05:07:24,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 20 [2024-11-14 05:07:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:07:24,457 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2024-11-14 05:07:24,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:07:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2024-11-14 05:07:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:07:24,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:07:24,458 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] [2024-11-14 05:07:24,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 05:07:24,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:07:24,659 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:07:24,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:07:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1751728778, now seen corresponding path program 1 times [2024-11-14 05:07:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:07:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743644790] [2024-11-14 05:07:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:07:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:24,767 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 05:07:24,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:07:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743644790] [2024-11-14 05:07:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743644790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:07:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623814479] [2024-11-14 05:07:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:07:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:07:24,770 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:07:24,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:07:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:24,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:07:24,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:07:24,953 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 05:07:24,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:07:25,048 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 05:07:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623814479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:07:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185954555] [2024-11-14 05:07:25,049 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:07:25,049 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:07:25,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:07:25,049 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:07:25,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:07:25,555 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:07:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1185954555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:07:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:07:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2024-11-14 05:07:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358763714] [2024-11-14 05:07:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:07:55,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:07:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:07:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:07:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=280, Unknown=4, NotChecked=0, Total=342 [2024-11-14 05:07:55,655 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:07:57,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:08:07,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:08:10,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:08:19,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:08:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:08:27,563 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-14 05:08:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:08:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:08:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:08:27,564 INFO L225 Difference]: With dead ends: 92 [2024-11-14 05:08:27,564 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 05:08:27,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=65, Invalid=311, Unknown=4, NotChecked=0, Total=380 [2024-11-14 05:08:27,565 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 9 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:08:27,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 869 Invalid, 5 Unknown, 0 Unchecked, 31.7s Time] [2024-11-14 05:08:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 05:08:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-14 05:08:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 91 states have internal predecessors, (97), 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 05:08:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2024-11-14 05:08:27,568 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 20 [2024-11-14 05:08:27,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:08:27,568 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2024-11-14 05:08:27,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:08:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2024-11-14 05:08:27,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:08:27,570 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:08:27,570 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] [2024-11-14 05:08:27,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:08:27,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:08:27,771 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:08:27,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:08:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2020555732, now seen corresponding path program 1 times [2024-11-14 05:08:27,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:08:27,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239638053] [2024-11-14 05:08:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:08:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:08:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:08:27,885 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 05:08:27,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:08:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239638053] [2024-11-14 05:08:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239638053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:08:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907899416] [2024-11-14 05:08:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:08:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:08:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:08:27,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:08:27,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:08:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:08:27,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:08:27,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:08:28,065 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 05:08:28,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:08:28,171 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 05:08:28,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907899416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:08:28,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134245286] [2024-11-14 05:08:28,173 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 05:08:28,173 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:08:28,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:08:28,174 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:08:28,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:08:28,653 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:08:51,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [134245286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:08:51,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:08:51,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:08:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068331011] [2024-11-14 05:08:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:08:51,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:08:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:08:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:08:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2024-11-14 05:08:51,544 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:08:54,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:03,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:06,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:15,255 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2024-11-14 05:09:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:09:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:09:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:15,256 INFO L225 Difference]: With dead ends: 90 [2024-11-14 05:09:15,256 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 05:09:15,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=68, Invalid=349, Unknown=3, NotChecked=0, Total=420 [2024-11-14 05:09:15,257 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 11 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:15,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 250 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 852 Invalid, 5 Unknown, 0 Unchecked, 23.4s Time] [2024-11-14 05:09:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 05:09:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-14 05:09:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 89 states have internal predecessors, (95), 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 05:09:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2024-11-14 05:09:15,260 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 21 [2024-11-14 05:09:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:15,260 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2024-11-14 05:09:15,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:09:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2024-11-14 05:09:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:09:15,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:15,261 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] [2024-11-14 05:09:15,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:09:15,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:09:15,461 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:09:15,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2020541830, now seen corresponding path program 1 times [2024-11-14 05:09:15,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:15,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404954001] [2024-11-14 05:09:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:15,567 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 05:09:15,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404954001] [2024-11-14 05:09:15,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404954001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:09:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068500275] [2024-11-14 05:09:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:09:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:09:15,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:09:15,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:09:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:15,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:09:15,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:09:15,782 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 05:09:15,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:09:15,921 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 05:09:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068500275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:09:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116730583] [2024-11-14 05:09:15,922 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 05:09:15,922 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:09:15,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:09:15,922 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:09:15,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:09:16,483 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:09:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [116730583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:39,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:09:39,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:09:39,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70880541] [2024-11-14 05:09:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:39,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:09:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:09:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2024-11-14 05:09:39,678 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:09:42,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:49,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:52,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:09:56,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:10:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:05,051 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-11-14 05:10:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:10:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:10:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:05,052 INFO L225 Difference]: With dead ends: 88 [2024-11-14 05:10:05,052 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 05:10:05,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=68, Invalid=349, Unknown=3, NotChecked=0, Total=420 [2024-11-14 05:10:05,052 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 8 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:05,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 253 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 825 Invalid, 6 Unknown, 0 Unchecked, 25.1s Time] [2024-11-14 05:10:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 05:10:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-14 05:10:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 87 states have internal predecessors, (93), 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 05:10:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2024-11-14 05:10:05,055 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 21 [2024-11-14 05:10:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:05,056 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2024-11-14 05:10:05,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:10:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2024-11-14 05:10:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:10:05,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:05,056 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] [2024-11-14 05:10:05,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:10:05,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:05,257 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:10:05,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1530982894, now seen corresponding path program 1 times [2024-11-14 05:10:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:05,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720094044] [2024-11-14 05:10:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:05,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:05,375 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 05:10:05,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720094044] [2024-11-14 05:10:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720094044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612205635] [2024-11-14 05:10:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:05,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:05,378 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:05,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:10:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:05,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:10:05,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:05,586 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 05:10:05,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:10:05,692 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 05:10:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612205635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:10:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188531667] [2024-11-14 05:10:05,694 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 05:10:05,694 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:10:05,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:10:05,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:10:05,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:10:06,210 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:10:28,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1188531667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:28,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:10:28,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:10:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130912653] [2024-11-14 05:10:28,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:28,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:10:28,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:10:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=315, Unknown=3, NotChecked=0, Total=380 [2024-11-14 05:10:28,986 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:10:36,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:10:39,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:10:41,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:10:46,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:10:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:54,315 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-11-14 05:10:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:10:54,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:10:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:54,316 INFO L225 Difference]: With dead ends: 86 [2024-11-14 05:10:54,316 INFO L226 Difference]: Without dead ends: 86 [2024-11-14 05:10:54,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=69, Invalid=348, Unknown=3, NotChecked=0, Total=420 [2024-11-14 05:10:54,317 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:54,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 236 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 728 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2024-11-14 05:10:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-14 05:10:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-14 05:10:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.4) internal successors, (91), 85 states have internal predecessors, (91), 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 05:10:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2024-11-14 05:10:54,319 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 21 [2024-11-14 05:10:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:54,320 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2024-11-14 05:10:54,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:10:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2024-11-14 05:10:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:10:54,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:54,320 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] [2024-11-14 05:10:54,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:10:54,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:54,521 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:10:54,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1530968992, now seen corresponding path program 1 times [2024-11-14 05:10:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049219107] [2024-11-14 05:10:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:54,642 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 05:10:54,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049219107] [2024-11-14 05:10:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049219107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717181451] [2024-11-14 05:10:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:54,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:54,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:10:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:54,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:10:54,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:54,829 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 05:10:54,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:10:54,971 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 05:10:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717181451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:10:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489136589] [2024-11-14 05:10:54,973 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-14 05:10:54,973 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:10:54,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:10:54,973 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:10:54,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:10:55,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:11:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [489136589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:11:28,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:11:28,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:11:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324502471] [2024-11-14 05:11:28,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:11:28,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:11:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:11:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=312, Unknown=6, NotChecked=0, Total=380 [2024-11-14 05:11:28,256 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:11:33,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:11:35,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:11:41,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:11:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:51,248 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-11-14 05:11:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:11:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:11:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:51,250 INFO L225 Difference]: With dead ends: 84 [2024-11-14 05:11:51,250 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 05:11:51,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=69, Invalid=345, Unknown=6, NotChecked=0, Total=420 [2024-11-14 05:11:51,252 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:51,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 259 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 853 Invalid, 5 Unknown, 0 Unchecked, 22.7s Time] [2024-11-14 05:11:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 05:11:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-14 05:11:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 83 states have internal predecessors, (89), 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 05:11:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2024-11-14 05:11:51,256 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 21 [2024-11-14 05:11:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:51,257 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2024-11-14 05:11:51,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:11:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2024-11-14 05:11:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:11:51,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:51,258 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] [2024-11-14 05:11:51,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 05:11:51,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:51,458 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:11:51,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash -463311007, now seen corresponding path program 1 times [2024-11-14 05:11:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:51,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628642103] [2024-11-14 05:11:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:51,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:51,587 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 05:11:51,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:51,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628642103] [2024-11-14 05:11:51,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628642103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:11:51,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068546104] [2024-11-14 05:11:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:51,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:51,591 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:11:51,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:11:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:51,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:11:51,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:11:51,837 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 05:11:51,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:11:51,961 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 05:11:51,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068546104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:11:51,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681284875] [2024-11-14 05:11:51,962 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 05:11:51,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:11:51,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:11:51,962 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:11:51,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:11:52,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:15,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [681284875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:15,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:15,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:12:15,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707282143] [2024-11-14 05:12:15,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:15,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:12:15,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:12:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=322, Unknown=2, NotChecked=0, Total=380 [2024-11-14 05:12:15,774 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 05:12:25,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:12:28,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:12:30,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:12:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:41,613 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-11-14 05:12:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:12:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 22 [2024-11-14 05:12:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:41,614 INFO L225 Difference]: With dead ends: 83 [2024-11-14 05:12:41,614 INFO L226 Difference]: Without dead ends: 83 [2024-11-14 05:12:41,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=63, Invalid=355, Unknown=2, NotChecked=0, Total=420 [2024-11-14 05:12:41,615 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:41,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 259 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 4 Unknown, 0 Unchecked, 25.5s Time] [2024-11-14 05:12:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-14 05:12:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-14 05:12:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.353846153846154) internal successors, (88), 82 states have internal predecessors, (88), 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 05:12:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2024-11-14 05:12:41,619 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 22 [2024-11-14 05:12:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:41,619 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2024-11-14 05:12:41,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 05:12:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2024-11-14 05:12:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:12:41,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:41,620 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] [2024-11-14 05:12:41,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:12:41,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 05:12:41,820 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:12:41,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -476671277, now seen corresponding path program 1 times [2024-11-14 05:12:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:41,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875709763] [2024-11-14 05:12:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:41,973 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 05:12:41,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875709763] [2024-11-14 05:12:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875709763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355285602] [2024-11-14 05:12:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:41,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:41,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:41,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:41,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:12:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:42,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:12:42,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:42,192 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 05:12:42,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:42,312 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 05:12:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355285602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979015821] [2024-11-14 05:12:42,314 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 05:12:42,314 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:42,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:42,314 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:42,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:43,016 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1979015821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:13,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:13,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2024-11-14 05:13:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459846712] [2024-11-14 05:13:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:13,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:13:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:13:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=319, Unknown=5, NotChecked=0, Total=380 [2024-11-14 05:13:13,490 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 05:13:16,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:13:25,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 8.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:13:28,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:13:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:36,508 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-11-14 05:13:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:13:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 22 [2024-11-14 05:13:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:36,510 INFO L225 Difference]: With dead ends: 82 [2024-11-14 05:13:36,510 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 05:13:36,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=63, Invalid=352, Unknown=5, NotChecked=0, Total=420 [2024-11-14 05:13:36,510 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 21 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:36,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 230 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 695 Invalid, 5 Unknown, 0 Unchecked, 22.7s Time] [2024-11-14 05:13:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 05:13:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-14 05:13:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 81 states have internal predecessors, (87), 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 05:13:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2024-11-14 05:13:36,514 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 22 [2024-11-14 05:13:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:36,515 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2024-11-14 05:13:36,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 05:13:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2024-11-14 05:13:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:13:36,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:36,519 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] [2024-11-14 05:13:36,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:13:36,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 05:13:36,720 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 05:13:36,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1477739200, now seen corresponding path program 1 times [2024-11-14 05:13:36,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:36,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115795367] [2024-11-14 05:13:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:36,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:36,843 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 05:13:36,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:36,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115795367] [2024-11-14 05:13:36,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115795367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:36,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822709198] [2024-11-14 05:13:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:36,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:36,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:36,846 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2a5753-91d6-49b9-96de-f814edb5b1c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:13:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:36,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:13:36,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:37,095 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 05:13:37,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:37,238 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 05:13:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822709198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910621437] [2024-11-14 05:13:37,239 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 05:13:37,239 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:37,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:37,240 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:37,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:37,910 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [910621437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:07,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:07,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [3, 3, 3] total 20 [2024-11-14 05:14:07,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284230685] [2024-11-14 05:14:07,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:07,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:14:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:14:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=359, Unknown=2, NotChecked=0, Total=420 [2024-11-14 05:14:07,420 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:18,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:14:21,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:14:23,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:14:25,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]