./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/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_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/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 64bit --witnessprinter.graph.data.programhash 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:57:24,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:57:24,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-14 03:57:24,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:57:24,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:57:24,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:57:24,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:57:24,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:57:24,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:57:24,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:57:24,787 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:57:24,788 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:57:24,788 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:57:24,788 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:57:24,788 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:57:24,788 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:57:24,789 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:57:24,789 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:57:24,789 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:57:24,789 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:57:24,789 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:57:24,790 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:57:24,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:57:24,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:57:24,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:57:24,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:57:24,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:57:24,791 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:57:24,791 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:57:24,791 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:57:24,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:57:24,792 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:57:24,792 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:57:24,792 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:57:24,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:57:24,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:57:24,793 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:57:24,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:57:24,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:57:24,793 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:57:24,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:57:24,794 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:57:24,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:57:24,794 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:57:24,794 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:57:24,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:57:24,794 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_dae7a013-bfea-4e54-a80a-238a3a9940c8/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e [2024-11-14 03:57:25,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:57:25,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:57:25,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:57:25,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:57:25,201 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:57:25,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i Unable to find full path for "g++" [2024-11-14 03:57:27,468 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:57:27,875 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:57:27,879 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2024-11-14 03:57:27,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/09adadfff/a082bf39070d4246b7301771609e3057/FLAG54d79048a [2024-11-14 03:57:28,033 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/09adadfff/a082bf39070d4246b7301771609e3057 [2024-11-14 03:57:28,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:57:28,038 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:57:28,040 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:57:28,040 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:57:28,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:57:28,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f45b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28, skipping insertion in model container [2024-11-14 03:57:28,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,120 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:57:28,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:57:28,489 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:57:28,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:57:28,578 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:57:28,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28 WrapperNode [2024-11-14 03:57:28,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:57:28,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:57:28,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:57:28,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:57:28,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,628 INFO L138 Inliner]: procedures = 122, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 84 [2024-11-14 03:57:28,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:57:28,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:57:28,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:57:28,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:57:28,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,668 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:57:28,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:57:28,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:57:28,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:57:28,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (1/1) ... [2024-11-14 03:57:28,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:57:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:28,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:57:28,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:57:28,762 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-14 03:57:28,762 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-14 03:57:28,762 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2024-11-14 03:57:28,762 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2024-11-14 03:57:28,762 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-14 03:57:28,763 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-14 03:57:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:57:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:57:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:57:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:57:28,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:57:28,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:57:28,939 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:57:28,942 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:57:29,552 INFO L? ?]: Removed 110 outVars from TransFormulas that were not future-live. [2024-11-14 03:57:29,552 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:57:29,699 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:57:29,703 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:57:29,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:57:29 BoogieIcfgContainer [2024-11-14 03:57:29,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:57:29,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:57:29,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:57:29,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:57:29,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:57:28" (1/3) ... [2024-11-14 03:57:29,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c148910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:57:29, skipping insertion in model container [2024-11-14 03:57:29,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:28" (2/3) ... [2024-11-14 03:57:29,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c148910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:57:29, skipping insertion in model container [2024-11-14 03:57:29,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:57:29" (3/3) ... [2024-11-14 03:57:29,717 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll.i [2024-11-14 03:57:29,739 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:57:29,744 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-nested-sll.i that has 4 procedures, 87 locations, 1 initial locations, 6 loop locations, and 39 error locations. [2024-11-14 03:57:29,811 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:57:29,827 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;@2aa4b186, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:57:29,827 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-14 03:57:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.236842105263158) internal successors, (85), 77 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:57:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:57:29,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:29,840 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:57:29,841 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:29,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 6806765, now seen corresponding path program 1 times [2024-11-14 03:57:29,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:29,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367342067] [2024-11-14 03:57:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:29,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:30,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367342067] [2024-11-14 03:57:30,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367342067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:30,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:30,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319638637] [2024-11-14 03:57:30,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:30,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,143 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.236842105263158) internal successors, (85), 77 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:57:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:30,314 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2024-11-14 03:57:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:57:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:30,324 INFO L225 Difference]: With dead ends: 85 [2024-11-14 03:57:30,324 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 03:57:30,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,335 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:30,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 114 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:57:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 03:57:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-14 03:57:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:57:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2024-11-14 03:57:30,386 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 4 [2024-11-14 03:57:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:30,386 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2024-11-14 03:57:30,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:57:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2024-11-14 03:57:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:57:30,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:30,390 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:57:30,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:57:30,390 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:30,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 6806766, now seen corresponding path program 1 times [2024-11-14 03:57:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:30,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639115247] [2024-11-14 03:57:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:30,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639115247] [2024-11-14 03:57:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639115247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:30,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:30,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518339554] [2024-11-14 03:57:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:30,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:30,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,523 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:57:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:30,662 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2024-11-14 03:57:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:57:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:30,665 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:57:30,665 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 03:57:30,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,668 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:30,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:57:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 03:57:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-14 03:57:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 72 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:57:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-11-14 03:57:30,690 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 4 [2024-11-14 03:57:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:30,691 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-11-14 03:57:30,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:57:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-11-14 03:57:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:57:30,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:30,694 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:30,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:57:30,694 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:30,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1229397557, now seen corresponding path program 1 times [2024-11-14 03:57:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003727237] [2024-11-14 03:57:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:30,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003727237] [2024-11-14 03:57:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003727237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:30,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056140360] [2024-11-14 03:57:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:30,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:30,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,846 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:57:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:30,983 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2024-11-14 03:57:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:30,985 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-14 03:57:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:30,987 INFO L225 Difference]: With dead ends: 81 [2024-11-14 03:57:30,987 INFO L226 Difference]: Without dead ends: 81 [2024-11-14 03:57:30,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:30,988 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:30,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:57:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-14 03:57:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-14 03:57:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 38 states have (on average 2.026315789473684) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:57:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2024-11-14 03:57:31,011 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2024-11-14 03:57:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:31,013 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2024-11-14 03:57:31,013 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:57:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2024-11-14 03:57:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:57:31,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:31,016 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:31,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:57:31,017 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:31,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1229397558, now seen corresponding path program 1 times [2024-11-14 03:57:31,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:31,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239237905] [2024-11-14 03:57:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:31,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239237905] [2024-11-14 03:57:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239237905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:31,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:31,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062610624] [2024-11-14 03:57:31,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:31,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:31,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:31,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:31,171 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:57:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:31,342 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2024-11-14 03:57:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:31,343 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-14 03:57:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:31,344 INFO L225 Difference]: With dead ends: 80 [2024-11-14 03:57:31,344 INFO L226 Difference]: Without dead ends: 80 [2024-11-14 03:57:31,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:31,345 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:31,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:57:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-14 03:57:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-14 03:57:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 38 states have (on average 2.0) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:57:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-11-14 03:57:31,359 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 11 [2024-11-14 03:57:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:31,363 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-11-14 03:57:31,364 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:57:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-11-14 03:57:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:57:31,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:31,365 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:31,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:57:31,365 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:31,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 226866522, now seen corresponding path program 1 times [2024-11-14 03:57:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:31,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167605641] [2024-11-14 03:57:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:31,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167605641] [2024-11-14 03:57:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167605641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:57:31,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123172035] [2024-11-14 03:57:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:31,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:57:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:57:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:57:31,777 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:57:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:32,363 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2024-11-14 03:57:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:57:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2024-11-14 03:57:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:32,367 INFO L225 Difference]: With dead ends: 94 [2024-11-14 03:57:32,367 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 03:57:32,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:57:32,368 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:32,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 222 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:57:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 03:57:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-11-14 03:57:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 77 states have internal predecessors, (91), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 03:57:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-11-14 03:57:32,387 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 18 [2024-11-14 03:57:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:32,387 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-11-14 03:57:32,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:57:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-11-14 03:57:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:57:32,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:32,388 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:32,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:57:32,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:32,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash 226866523, now seen corresponding path program 1 times [2024-11-14 03:57:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678280048] [2024-11-14 03:57:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:33,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678280048] [2024-11-14 03:57:33,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678280048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:33,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 03:57:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729170981] [2024-11-14 03:57:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:33,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:57:33,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:57:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:57:33,129 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:57:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:33,790 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2024-11-14 03:57:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:57:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2024-11-14 03:57:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:33,792 INFO L225 Difference]: With dead ends: 102 [2024-11-14 03:57:33,792 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 03:57:33,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:57:33,793 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:33,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 244 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:57:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 03:57:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-14 03:57:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 83 states have internal predecessors, (99), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 03:57:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2024-11-14 03:57:33,807 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 18 [2024-11-14 03:57:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:33,807 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2024-11-14 03:57:33,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:57:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2024-11-14 03:57:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:57:33,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:33,812 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:33,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:57:33,812 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:33,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash -985725274, now seen corresponding path program 1 times [2024-11-14 03:57:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:33,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47397386] [2024-11-14 03:57:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:34,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47397386] [2024-11-14 03:57:34,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47397386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024772322] [2024-11-14 03:57:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:34,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:34,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:34,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:57:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:34,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:57:34,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:34,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:57:34,309 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-14 03:57:34,355 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:57:34,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-14 03:57:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 03:57:34,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:34,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024772322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:34,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776248242] [2024-11-14 03:57:34,591 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:57:34,591 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:34,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:34,599 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:34,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:34,789 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 50 for LOIs [2024-11-14 03:57:35,283 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 92 for LOIs [2024-11-14 03:57:35,419 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:57:35,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:41,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1297#(and (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (exists ((v_create_internal_~now~0.base_16 Int)) (and (not (= (select |#valid| v_create_internal_~now~0.base_16) 1)) (or (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_100| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_100| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_100| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.base_98| (Array Int (Array Int Int))) (|v_#valid_114| (Array Int Int)) (|v_#memory_$Pointer$.offset_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| Int) (|v_#length_94| (Array Int Int))) (and (= |old(#valid)| (store |v_#valid_114| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0))) (= (select |v_#valid_114| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0) (= (store |v_#length_94| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 16) |old(#length)|) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1) |#StackHeapBarrier|) (= |old(#memory_$Pointer$.base)| (store |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0))) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 0)))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 0) 0)) (= v_create_internal_~now~0.base_16 create_internal_~sll~0.base) (exists ((|v_#length_95| (Array Int Int))) (= |#length| (store |v_#length_95| |create_internal_#t~ret7.base| 8))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_create_internal_#t~nondet6_7| Int)) (and (not (= |v_create_internal_#t~nondet6_7| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_7| 2147483648)) (<= |v_create_internal_#t~nondet6_7| 2147483647))) (exists ((|v_#memory_$Pointer$.offset_101| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_101| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_101| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.offset|)) (exists ((|v_#valid_116| (Array Int Int))) (= (select |v_#valid_116| create_internal_~sll~0.base) 0)) (not (= create_internal_~sll~0.base 0)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_115| (Array Int Int))) (and (= (select |v_#valid_115| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_115| |create_internal_#t~ret7.base| 1) |#valid|)))) (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_100| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_100| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_100| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_#valid_115| (Array Int Int))) (= (select |v_#valid_115| create_internal_~sll~0.base) 0)) (exists ((|v_#memory_$Pointer$.base_98| (Array Int (Array Int Int))) (|v_#valid_114| (Array Int Int)) (|v_#memory_$Pointer$.offset_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| Int) (|v_#length_94| (Array Int Int))) (and (= |old(#valid)| (store |v_#valid_114| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0))) (= (select |v_#valid_114| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0) (= (store |v_#length_94| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 16) |old(#length)|) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1) |#StackHeapBarrier|) (= |old(#memory_$Pointer$.base)| (store |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0))) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 0)))) (exists ((|v_#valid_117| (Array Int Int))) (and (= (select |v_#valid_117| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_117| |create_internal_#t~ret7.base| 1) |#valid|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 0) 0)) (= v_create_internal_~now~0.base_16 create_internal_~sll~0.base) (exists ((|v_#length_95| (Array Int Int))) (= |#length| (store |v_#length_95| |create_internal_#t~ret7.base| 8))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_create_internal_#t~nondet6_7| Int)) (and (not (= |v_create_internal_#t~nondet6_7| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_7| 2147483648)) (<= |v_create_internal_#t~nondet6_7| 2147483647))) (exists ((|v_#memory_$Pointer$.offset_100| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_100| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_100| |create_internal_#t~ret7.base|) 0 0)))) (not (= create_internal_~sll~0.base 0)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|))))) (= create_internal_~now~0.offset 0) (= |create_internal_#t~ret7.offset| 0))' at error location [2024-11-14 03:57:41,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:41,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:41,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2024-11-14 03:57:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460864701] [2024-11-14 03:57:41,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:41,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:57:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:57:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=567, Unknown=2, NotChecked=48, Total=702 [2024-11-14 03:57:41,922 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:57:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:42,575 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2024-11-14 03:57:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:57:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 20 [2024-11-14 03:57:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:42,577 INFO L225 Difference]: With dead ends: 99 [2024-11-14 03:57:42,577 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 03:57:42,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=113, Invalid=819, Unknown=2, NotChecked=58, Total=992 [2024-11-14 03:57:42,578 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 28 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:42,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 282 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 375 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2024-11-14 03:57:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 03:57:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-14 03:57:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 83 states have internal predecessors, (100), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 03:57:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2024-11-14 03:57:42,587 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 20 [2024-11-14 03:57:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:42,587 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2024-11-14 03:57:42,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:57:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2024-11-14 03:57:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:57:42,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:42,588 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:42,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:57:42,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:42,789 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:42,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash -985725273, now seen corresponding path program 1 times [2024-11-14 03:57:42,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:42,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294198760] [2024-11-14 03:57:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:42,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:43,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294198760] [2024-11-14 03:57:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294198760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309869341] [2024-11-14 03:57:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:43,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:43,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:43,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:43,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:57:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:43,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:57:43,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:43,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:57:43,427 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-11-14 03:57:43,447 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:57:43,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-14 03:57:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 03:57:43,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:43,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309869341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:43,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243786465] [2024-11-14 03:57:43,597 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:57:43,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:43,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:43,598 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:43,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:43,688 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 54 for LOIs [2024-11-14 03:57:44,039 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 92 for LOIs [2024-11-14 03:57:44,144 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:57:44,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:48,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1600#(and (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (= |create_internal_#t~ret7.offset| 0) (exists ((v_create_internal_~now~0.base_17 Int)) (and (<= (select |#length| v_create_internal_~now~0.base_17) 7) (or (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_create_internal_#t~nondet6_8| Int)) (and (not (= |v_create_internal_#t~nondet6_8| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_8| 2147483648)) (<= |v_create_internal_#t~nondet6_8| 2147483647))) (exists ((|v_#valid_124| (Array Int Int)) (|v_#length_108| (Array Int Int)) (|v_#memory_$Pointer$.offset_110| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| Int) (|v_#memory_$Pointer$.base_110| (Array Int (Array Int Int)))) (and (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 0)) (= (select |v_#valid_124| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0) (= |old(#valid)| (store |v_#valid_124| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1)) (= (store |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0)) |old(#memory_$Pointer$.base)|) (= |old(#length)| (store |v_#length_108| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 16)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0))) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1) |#StackHeapBarrier|))) (exists ((|v_#memory_$Pointer$.base_112| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_112| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_112| |create_internal_#t~ret7.base|) 0 0)))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_#valid_127| (Array Int Int))) (and (= (store |v_#valid_127| |create_internal_#t~ret7.base| 1) |#valid|) (= (select |v_#valid_127| |create_internal_#t~ret7.base|) 0))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| 0) 0)) (exists ((|v_#valid_125| (Array Int Int))) (= (select |v_#valid_125| create_internal_~sll~0.base) 0)) (not (= create_internal_~sll~0.base 0)) (exists ((|v_#memory_$Pointer$.offset_114| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_114| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_114| |create_internal_#t~ret7.base|) 0 0)))) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (= v_create_internal_~now~0.base_17 create_internal_~sll~0.base) (exists ((|v_#length_111| (Array Int Int))) (= (store |v_#length_111| |create_internal_#t~ret7.base| 8) |#length|))) (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_113| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_113| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_113| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_create_internal_#t~nondet6_8| Int)) (and (not (= |v_create_internal_#t~nondet6_8| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_8| 2147483648)) (<= |v_create_internal_#t~nondet6_8| 2147483647))) (exists ((|v_#valid_124| (Array Int Int)) (|v_#length_108| (Array Int Int)) (|v_#memory_$Pointer$.offset_110| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| Int) (|v_#memory_$Pointer$.base_110| (Array Int (Array Int Int)))) (and (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 0)) (= (select |v_#valid_124| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0) (= |old(#valid)| (store |v_#valid_124| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1)) (= (store |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0)) |old(#memory_$Pointer$.base)|) (= |old(#length)| (store |v_#length_108| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 16)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0))) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1) |#StackHeapBarrier|))) (exists ((|v_#length_110| (Array Int Int))) (= |#length| (store |v_#length_110| |create_internal_#t~ret7.base| 8))) (exists ((|v_#memory_$Pointer$.offset_113| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_113| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_113| |create_internal_#t~ret7.base|) 0 0)))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| 0) 0)) (exists ((|v_#valid_126| (Array Int Int))) (= 0 (select |v_#valid_126| create_internal_~sll~0.base))) (not (= create_internal_~sll~0.base 0)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_125| (Array Int Int))) (and (= (store |v_#valid_125| |create_internal_#t~ret7.base| 1) |#valid|) (= (select |v_#valid_125| |create_internal_#t~ret7.base|) 0))) (= v_create_internal_~now~0.base_17 create_internal_~sll~0.base))))))' at error location [2024-11-14 03:57:48,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:48,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:57:48,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2024-11-14 03:57:48,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347714334] [2024-11-14 03:57:48,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:48,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:57:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:57:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=830, Unknown=1, NotChecked=58, Total=992 [2024-11-14 03:57:48,355 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 14 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:57:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:49,005 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2024-11-14 03:57:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:57:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 20 [2024-11-14 03:57:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:49,007 INFO L225 Difference]: With dead ends: 100 [2024-11-14 03:57:49,007 INFO L226 Difference]: Without dead ends: 100 [2024-11-14 03:57:49,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=127, Invalid=1066, Unknown=1, NotChecked=66, Total=1260 [2024-11-14 03:57:49,010 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:49,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 338 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2024-11-14 03:57:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-14 03:57:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-14 03:57:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 84 states have internal predecessors, (100), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 03:57:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2024-11-14 03:57:49,029 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 20 [2024-11-14 03:57:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:49,029 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2024-11-14 03:57:49,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:57:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2024-11-14 03:57:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:57:49,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:49,030 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 03:57:49,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:57:49,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:49,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:49,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 991776919, now seen corresponding path program 1 times [2024-11-14 03:57:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214336202] [2024-11-14 03:57:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:49,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214336202] [2024-11-14 03:57:49,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214336202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:49,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:57:49,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583461270] [2024-11-14 03:57:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:49,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:57:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:57:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:57:49,327 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:49,517 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2024-11-14 03:57:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:57:49,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-14 03:57:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:49,519 INFO L225 Difference]: With dead ends: 115 [2024-11-14 03:57:49,519 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 03:57:49,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:57:49,521 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:49,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 169 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:57:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 03:57:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2024-11-14 03:57:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 92 states have internal predecessors, (120), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:57:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2024-11-14 03:57:49,536 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 23 [2024-11-14 03:57:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:49,537 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2024-11-14 03:57:49,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2024-11-14 03:57:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:57:49,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:49,540 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 03:57:49,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:57:49,540 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:49,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash 991776920, now seen corresponding path program 1 times [2024-11-14 03:57:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875894485] [2024-11-14 03:57:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:49,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875894485] [2024-11-14 03:57:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875894485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:49,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:57:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962309419] [2024-11-14 03:57:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:49,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:57:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:57:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:57:49,790 INFO L87 Difference]: Start difference. First operand 110 states and 146 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:50,052 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2024-11-14 03:57:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:57:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-14 03:57:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:50,054 INFO L225 Difference]: With dead ends: 120 [2024-11-14 03:57:50,054 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 03:57:50,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:57:50,055 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:50,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 341 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:57:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 03:57:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-14 03:57:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 98 states have internal predecessors, (130), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:57:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 156 transitions. [2024-11-14 03:57:50,073 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 156 transitions. Word has length 23 [2024-11-14 03:57:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:50,073 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 156 transitions. [2024-11-14 03:57:50,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 156 transitions. [2024-11-14 03:57:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 03:57:50,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:50,076 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:50,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:57:50,076 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:50,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 680457517, now seen corresponding path program 1 times [2024-11-14 03:57:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:50,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834661467] [2024-11-14 03:57:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:50,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834661467] [2024-11-14 03:57:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834661467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:50,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:50,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:57:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291946244] [2024-11-14 03:57:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:50,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:57:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:57:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:57:50,177 INFO L87 Difference]: Start difference. First operand 116 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:50,314 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2024-11-14 03:57:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:57:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-14 03:57:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:50,316 INFO L225 Difference]: With dead ends: 123 [2024-11-14 03:57:50,316 INFO L226 Difference]: Without dead ends: 123 [2024-11-14 03:57:50,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:57:50,317 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 21 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:50,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 345 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:57:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-14 03:57:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-14 03:57:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 99 states have internal predecessors, (129), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:57:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2024-11-14 03:57:50,325 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 24 [2024-11-14 03:57:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:50,325 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2024-11-14 03:57:50,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2024-11-14 03:57:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:57:50,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:50,327 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:50,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:57:50,327 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:50,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -384994342, now seen corresponding path program 1 times [2024-11-14 03:57:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179230904] [2024-11-14 03:57:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:50,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179230904] [2024-11-14 03:57:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179230904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-14 03:57:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587050236] [2024-11-14 03:57:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:50,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:57:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:57:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:57:50,880 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 14 states, 9 states have (on average 2.111111111111111) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:51,361 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2024-11-14 03:57:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:57:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 2.111111111111111) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-14 03:57:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:51,363 INFO L225 Difference]: With dead ends: 129 [2024-11-14 03:57:51,363 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 03:57:51,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:57:51,364 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:51,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 459 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:57:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 03:57:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2024-11-14 03:57:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 104 states have internal predecessors, (136), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:57:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2024-11-14 03:57:51,376 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 25 [2024-11-14 03:57:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:51,376 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2024-11-14 03:57:51,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 2.111111111111111) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2024-11-14 03:57:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:57:51,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:51,386 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:51,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:57:51,387 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:51,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -384994341, now seen corresponding path program 1 times [2024-11-14 03:57:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752148973] [2024-11-14 03:57:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:52,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:52,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752148973] [2024-11-14 03:57:52,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752148973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:52,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:52,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-14 03:57:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744975601] [2024-11-14 03:57:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:52,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:57:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:57:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:57:52,305 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:52,930 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2024-11-14 03:57:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:57:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-14 03:57:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:52,932 INFO L225 Difference]: With dead ends: 129 [2024-11-14 03:57:52,932 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 03:57:52,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:57:52,933 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:52,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 562 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:57:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 03:57:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2024-11-14 03:57:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.7532467532467533) internal successors, (135), 104 states have internal predecessors, (135), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-14 03:57:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2024-11-14 03:57:52,946 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 25 [2024-11-14 03:57:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:52,948 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 161 transitions. [2024-11-14 03:57:52,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:57:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 161 transitions. [2024-11-14 03:57:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:57:52,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:52,949 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:52,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:57:52,951 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:57:52,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1926466384, now seen corresponding path program 1 times [2024-11-14 03:57:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280958800] [2024-11-14 03:57:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:57:53,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280958800] [2024-11-14 03:57:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280958800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984592284] [2024-11-14 03:57:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:53,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:53,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:53,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:53,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:57:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:53,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:57:53,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:53,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:57:53,804 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-14 03:57:53,843 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-14 03:57:54,121 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2024-11-14 03:57:54,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 104 [2024-11-14 03:57:54,697 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-14 03:57:54,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2024-11-14 03:57:54,743 INFO L349 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2024-11-14 03:57:54,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 59 [2024-11-14 03:57:54,833 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2024-11-14 03:57:54,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 16 [2024-11-14 03:57:55,155 INFO L349 Elim1Store]: treesize reduction 182, result has 30.5 percent of original size [2024-11-14 03:57:55,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 146 [2024-11-14 03:57:56,057 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:57:56,062 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-14 03:57:56,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 9 [2024-11-14 03:57:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-14 03:57:56,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984592284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291558401] [2024-11-14 03:57:56,735 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 03:57:56,735 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:56,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:56,736 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:56,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:57,741 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 54 for LOIs [2024-11-14 03:58:00,957 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 53 for LOIs [2024-11-14 03:58:00,985 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:58:00,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:07,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3187#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_#t~ret10#1.offset| 0) (exists ((|v_ULTIMATE.start_create_~now~1#1.base_29| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_create_~now~1#1.base_29|) 1)) (or (and (exists ((|v_#valid_150| (Array Int Int))) (= (select |v_#valid_150| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_132| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_132| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.offset_132| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (= |v_ULTIMATE.start_create_~now~1#1.base_29| |ULTIMATE.start_create_~sll~1#1.base|) (not (= |ULTIMATE.start_create_#t~ret10#1.base| 0)) (exists ((|v_#valid_151| (Array Int Int))) (and (= (select |v_#valid_151| |ULTIMATE.start_create_#t~ret10#1.base|) 0) (= |#valid| (store |v_#valid_151| |ULTIMATE.start_create_#t~ret10#1.base| 1)))) (exists ((|v_#memory_$Pointer$.base_132| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_132| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.base_132| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_126| (Array Int Int))) (= (store |v_#length_126| |ULTIMATE.start_create_#t~ret10#1.base| 8) |#length|)) (<= (+ |ULTIMATE.start_create_#t~ret10#1.base| 1) |#StackHeapBarrier|)) (and (exists ((|v_#valid_150| (Array Int Int))) (= (select |v_#valid_150| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (= |v_ULTIMATE.start_create_~now~1#1.base_29| |ULTIMATE.start_create_~sll~1#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_151| (Array Int Int)) (|v_#length_126| (Array Int Int)) (|v_#memory_$Pointer$.offset_132| (Array Int (Array Int Int))) (v_create_internal_~now~0.base_25 Int) (v_create_internal_~now~0.offset_22 Int) (|v_#memory_$Pointer$.base_132| (Array Int (Array Int Int)))) (and (<= (+ v_create_internal_~now~0.offset_22 8) (select |#length| v_create_internal_~now~0.base_25)) (= (store |v_#valid_151| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) 1) |#valid|) (<= 0 v_create_internal_~now~0.offset_22) (not (= (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) 0)) (= |#length| (store |v_#length_126| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) 8)) (= (select |#valid| v_create_internal_~now~0.base_25) 1) (= (store (store |v_#memory_$Pointer$.base_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) (store (select |v_#memory_$Pointer$.base_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22)) 0 0)) v_create_internal_~now~0.base_25 (store (select (store |v_#memory_$Pointer$.base_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) (store (select |v_#memory_$Pointer$.base_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22)) 0 0)) v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22 (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) (store (select |v_#memory_$Pointer$.offset_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22)) 0 0)) v_create_internal_~now~0.base_25 (store (select (store |v_#memory_$Pointer$.offset_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) (store (select |v_#memory_$Pointer$.offset_132| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22)) 0 0)) v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22 0))) (= (select |v_#valid_151| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22)) 0) (<= (+ (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_25) v_create_internal_~now~0.offset_22) 1) |#StackHeapBarrier|))))))) (= |ULTIMATE.start_create_~now~1#1.offset| 0) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2024-11-14 03:58:07,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:07,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:58:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2024-11-14 03:58:07,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163487767] [2024-11-14 03:58:07,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:07,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:58:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:58:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1120, Unknown=4, NotChecked=138, Total=1406 [2024-11-14 03:58:07,800 INFO L87 Difference]: Start difference. First operand 122 states and 161 transitions. Second operand has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 03:58:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:09,926 INFO L93 Difference]: Finished difference Result 134 states and 183 transitions. [2024-11-14 03:58:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:58:09,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 26 [2024-11-14 03:58:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:09,928 INFO L225 Difference]: With dead ends: 134 [2024-11-14 03:58:09,928 INFO L226 Difference]: Without dead ends: 134 [2024-11-14 03:58:09,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=216, Invalid=1680, Unknown=4, NotChecked=170, Total=2070 [2024-11-14 03:58:09,930 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:09,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 323 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 563 Invalid, 0 Unknown, 228 Unchecked, 1.3s Time] [2024-11-14 03:58:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-14 03:58:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2024-11-14 03:58:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.7407407407407407) internal successors, (141), 108 states have internal predecessors, (141), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 03:58:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 171 transitions. [2024-11-14 03:58:09,946 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 171 transitions. Word has length 26 [2024-11-14 03:58:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:09,947 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 171 transitions. [2024-11-14 03:58:09,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 03:58:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 171 transitions. [2024-11-14 03:58:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:58:09,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:09,950 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:09,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:58:10,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:10,150 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:58:10,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:10,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1926466383, now seen corresponding path program 1 times [2024-11-14 03:58:10,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:10,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763675189] [2024-11-14 03:58:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:11,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763675189] [2024-11-14 03:58:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763675189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909058959] [2024-11-14 03:58:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:11,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:11,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:58:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:11,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 03:58:11,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:11,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:58:11,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 03:58:11,481 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1)))) is different from true [2024-11-14 03:58:11,569 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-14 03:58:11,612 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_internal_~pi~1.base_47 Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (= (select (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1) v_alloc_and_zero_internal_~pi~1.base_47) 0) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#length| (store (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_47 (select |c_#length| v_alloc_and_zero_internal_~pi~1.base_47))))) is different from true [2024-11-14 03:58:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:58:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:58:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:58:11,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2024-11-14 03:58:11,744 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-14 03:58:11,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2024-11-14 03:58:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-14 03:58:11,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:12,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909058959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:12,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118755603] [2024-11-14 03:58:12,203 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 03:58:12,203 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:12,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:12,204 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:12,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:13,067 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 52 for LOIs [2024-11-14 03:58:14,089 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 55 for LOIs [2024-11-14 03:58:14,124 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:58:14,140 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:21,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3585#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_#t~ret10#1.offset| 0) (exists ((|v_ULTIMATE.start_create_~now~1#1.base_30| Int)) (and (or (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_162| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_162| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.offset_162| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (not (= |ULTIMATE.start_create_#t~ret10#1.base| 0)) (= |v_ULTIMATE.start_create_~now~1#1.base_30| |ULTIMATE.start_create_~sll~1#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_178| (Array Int Int))) (and (= (store |v_#valid_178| |ULTIMATE.start_create_#t~ret10#1.base| 1) |#valid|) (= (select |v_#valid_178| |ULTIMATE.start_create_#t~ret10#1.base|) 0))) (exists ((|v_#length_154| (Array Int Int))) (= |#length| (store |v_#length_154| |ULTIMATE.start_create_#t~ret10#1.base| 8))) (exists ((|v_#memory_$Pointer$.base_162| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_162| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.base_162| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (exists ((|v_#valid_177| (Array Int Int))) (= (select |v_#valid_177| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (<= (+ |ULTIMATE.start_create_#t~ret10#1.base| 1) |#StackHeapBarrier|)) (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_162| (Array Int (Array Int Int))) (|v_#valid_178| (Array Int Int)) (|v_#memory_$Pointer$.offset_162| (Array Int (Array Int Int))) (|v_#length_154| (Array Int Int)) (v_create_internal_~now~0.base_37 Int) (v_create_internal_~now~0.offset_34 Int)) (and (= (select |#valid| v_create_internal_~now~0.base_37) 1) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) (store (select |v_#memory_$Pointer$.offset_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34)) 0 0)) v_create_internal_~now~0.base_37 (store (select (store |v_#memory_$Pointer$.offset_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) (store (select |v_#memory_$Pointer$.offset_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34)) 0 0)) v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34 0))) (= (store (store |v_#memory_$Pointer$.base_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) (store (select |v_#memory_$Pointer$.base_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34)) 0 0)) v_create_internal_~now~0.base_37 (store (select (store |v_#memory_$Pointer$.base_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) (store (select |v_#memory_$Pointer$.base_162| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34)) 0 0)) v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34 (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34))) |#memory_$Pointer$.base|) (= (select |v_#valid_178| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34)) 0) (<= (+ v_create_internal_~now~0.offset_34 8) (select |#length| v_create_internal_~now~0.base_37)) (= (store |v_#length_154| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) 8) |#length|) (<= 0 v_create_internal_~now~0.offset_34) (= (store |v_#valid_178| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) 1) |#valid|) (<= (+ (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) 1) |#StackHeapBarrier|) (not (= (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_37) v_create_internal_~now~0.offset_34) 0)))) (= |v_ULTIMATE.start_create_~now~1#1.base_30| |ULTIMATE.start_create_~sll~1#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_177| (Array Int Int))) (= (select |v_#valid_177| |ULTIMATE.start_create_~sll~1#1.base|) 0)))) (<= (select |#length| |v_ULTIMATE.start_create_~now~1#1.base_30|) 15))) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2024-11-14 03:58:21,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:21,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:58:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2024-11-14 03:58:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919942215] [2024-11-14 03:58:21,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:21,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:58:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:58:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1197, Unknown=4, NotChecked=216, Total=1560 [2024-11-14 03:58:21,182 INFO L87 Difference]: Start difference. First operand 127 states and 171 transitions. Second operand has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 03:58:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:22,870 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2024-11-14 03:58:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:58:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 26 [2024-11-14 03:58:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:22,872 INFO L225 Difference]: With dead ends: 143 [2024-11-14 03:58:22,872 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 03:58:22,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=185, Invalid=1544, Unknown=5, NotChecked=246, Total=1980 [2024-11-14 03:58:22,874 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 27 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:22,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 345 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 627 Invalid, 0 Unknown, 361 Unchecked, 1.0s Time] [2024-11-14 03:58:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 03:58:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2024-11-14 03:58:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 110 states have internal predecessors, (143), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 03:58:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2024-11-14 03:58:22,882 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 26 [2024-11-14 03:58:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:22,882 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2024-11-14 03:58:22,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 03:58:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2024-11-14 03:58:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:58:22,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:22,884 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:22,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:58:23,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:58:23,085 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:58:23,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -164411268, now seen corresponding path program 1 times [2024-11-14 03:58:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644794103] [2024-11-14 03:58:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:58:23,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644794103] [2024-11-14 03:58:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644794103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53130590] [2024-11-14 03:58:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:23,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:23,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:23,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:58:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:23,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:58:23,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:23,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:58:23,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:58:23,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-14 03:58:23,649 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-14 03:58:23,679 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:58:23,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-14 03:58:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 03:58:23,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53130590] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713821126] [2024-11-14 03:58:23,973 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 03:58:23,973 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:23,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:23,973 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:23,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:24,029 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 50 for LOIs [2024-11-14 03:58:29,017 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 53 for LOIs [2024-11-14 03:58:29,053 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:58:29,072 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:37,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4062#(and (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (exists ((v_create_internal_~now~0.base_47 Int)) (not (= (select |#valid| v_create_internal_~now~0.base_47) 1))) (or (and (exists ((|v_#memory_$Pointer$.offset_198| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_198| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_198| |create_internal_#t~ret7.base|) 0 0)))) (exists ((|v_#valid_208| (Array Int Int))) (and (= (select |v_#valid_208| |create_internal_#t~ret7.base|) 0) (= |#valid| (store |v_#valid_208| |create_internal_#t~ret7.base| 1)))) (exists ((|v_#memory_$Pointer$.base_199| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_199| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_199| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |create_internal_#t~ret7.base| 0)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_178| (Array Int Int))) (= (store |v_#length_178| |create_internal_#t~ret7.base| 8) |#length|))) (and (exists ((|v_#memory_$Pointer$.offset_198| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_198| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_198| |create_internal_#t~ret7.base|) 0 0)))) (= create_internal_~now~0.offset 0) (exists ((|v_#valid_208| (Array Int Int))) (and (= (select |v_#valid_208| |create_internal_#t~ret7.base|) 0) (= |#valid| (store |v_#valid_208| |create_internal_#t~ret7.base| 1)))) (exists ((|v_#memory_$Pointer$.base_199| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_199| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_199| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |create_internal_#t~ret7.base| 0)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_178| (Array Int Int))) (= (store |v_#length_178| |create_internal_#t~ret7.base| 8) |#length|)))) (= |create_internal_#t~ret7.offset| 0))' at error location [2024-11-14 03:58:37,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:37,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:37,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 11 [2024-11-14 03:58:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394381614] [2024-11-14 03:58:37,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:37,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:58:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:58:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=713, Unknown=2, NotChecked=54, Total=870 [2024-11-14 03:58:37,273 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 03:58:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:38,966 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2024-11-14 03:58:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:58:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2024-11-14 03:58:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:38,968 INFO L225 Difference]: With dead ends: 128 [2024-11-14 03:58:38,968 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 03:58:38,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=135, Invalid=1057, Unknown=2, NotChecked=66, Total=1260 [2024-11-14 03:58:38,969 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 18 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:38,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 372 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 481 Invalid, 0 Unknown, 91 Unchecked, 1.2s Time] [2024-11-14 03:58:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 03:58:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2024-11-14 03:58:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.7108433734939759) internal successors, (142), 109 states have internal predecessors, (142), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 03:58:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 172 transitions. [2024-11-14 03:58:38,978 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 172 transitions. Word has length 28 [2024-11-14 03:58:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:38,979 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 172 transitions. [2024-11-14 03:58:38,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 03:58:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 172 transitions. [2024-11-14 03:58:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:58:38,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:38,980 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:38,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:58:39,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:58:39,181 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:58:39,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash -164411267, now seen corresponding path program 1 times [2024-11-14 03:58:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:39,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786290161] [2024-11-14 03:58:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:40,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786290161] [2024-11-14 03:58:40,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786290161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572068470] [2024-11-14 03:58:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:40,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:40,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:40,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:58:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:40,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:58:40,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:40,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:58:40,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:58:40,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:58:40,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-14 03:58:40,730 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-11-14 03:58:40,791 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:58:40,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-14 03:58:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 03:58:40,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572068470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:41,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821301503] [2024-11-14 03:58:41,167 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 03:58:41,167 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:41,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:41,167 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:41,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:41,234 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 52 for LOIs [2024-11-14 03:58:44,185 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 55 for LOIs [2024-11-14 03:58:44,213 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:58:44,226 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:48,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4454#(and (= create_internal_~sll~0.offset 0) (exists ((|v_#valid_218| (Array Int Int))) (and (= (select |v_#valid_218| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_218| |create_internal_#t~ret7.base| 1) |#valid|))) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_214| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_214| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_214| |create_internal_#t~ret7.base|) 0 0)))) (not (= |create_internal_#t~ret7.base| 0)) (= |create_internal_#t~ret7.offset| 0) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_192| (Array Int Int))) (= |#length| (store |v_#length_192| |create_internal_#t~ret7.base| 8))) (exists ((|v_#memory_$Pointer$.base_215| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_215| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_215| |create_internal_#t~ret7.base|) 0 0)))))' at error location [2024-11-14 03:58:48,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:48,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:58:48,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-11-14 03:58:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661941596] [2024-11-14 03:58:48,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:48,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:58:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:58:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1007, Unknown=1, NotChecked=64, Total=1190 [2024-11-14 03:58:48,810 INFO L87 Difference]: Start difference. First operand 128 states and 172 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 03:58:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:50,666 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2024-11-14 03:58:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:58:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2024-11-14 03:58:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:50,668 INFO L225 Difference]: With dead ends: 126 [2024-11-14 03:58:50,668 INFO L226 Difference]: Without dead ends: 126 [2024-11-14 03:58:50,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=145, Invalid=1264, Unknown=1, NotChecked=72, Total=1482 [2024-11-14 03:58:50,669 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:50,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 412 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 568 Invalid, 0 Unknown, 90 Unchecked, 1.5s Time] [2024-11-14 03:58:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-14 03:58:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-14 03:58:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 107 states have internal predecessors, (140), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-14 03:58:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2024-11-14 03:58:50,676 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 170 transitions. Word has length 28 [2024-11-14 03:58:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:50,677 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 170 transitions. [2024-11-14 03:58:50,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 03:58:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 170 transitions. [2024-11-14 03:58:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:58:50,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:50,678 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:50,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:50,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:58:50,882 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:58:50,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -612255722, now seen corresponding path program 1 times [2024-11-14 03:58:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400699107] [2024-11-14 03:58:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:58:52,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400699107] [2024-11-14 03:58:52,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400699107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626112695] [2024-11-14 03:58:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:52,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:52,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:58:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:52,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 03:58:52,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:52,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:58:53,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:58:53,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:58:54,026 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:58:54,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 03:58:54,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 03:58:54,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-14 03:58:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:58:54,920 INFO L349 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2024-11-14 03:58:54,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2024-11-14 03:58:54,970 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 03:58:54,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2024-11-14 03:58:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:58:54,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:57,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:57,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 520 treesize of output 518 [2024-11-14 03:58:57,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:57,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2511 treesize of output 2390 [2024-11-14 03:59:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626112695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519865495] [2024-11-14 03:59:01,808 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:59:01,808 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:01,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:01,809 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:01,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:02,101 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 52 for LOIs [2024-11-14 03:59:02,244 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 50 for LOIs [2024-11-14 03:59:02,271 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:59:02,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1519865495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:59:10,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:59:10,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [18, 17] total 50 [2024-11-14 03:59:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583256986] [2024-11-14 03:59:10,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:59:10,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:59:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:59:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:59:10,639 INFO L87 Difference]: Start difference. First operand 126 states and 170 transitions. Second operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:59:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:15,455 INFO L93 Difference]: Finished difference Result 144 states and 189 transitions. [2024-11-14 03:59:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:59:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2024-11-14 03:59:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:15,457 INFO L225 Difference]: With dead ends: 144 [2024-11-14 03:59:15,457 INFO L226 Difference]: Without dead ends: 144 [2024-11-14 03:59:15,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:59:15,459 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:15,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 250 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1231 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 03:59:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-14 03:59:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2024-11-14 03:59:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.6236559139784945) internal successors, (151), 117 states have internal predecessors, (151), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 03:59:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2024-11-14 03:59:15,468 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 27 [2024-11-14 03:59:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:15,468 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2024-11-14 03:59:15,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:59:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2024-11-14 03:59:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:59:15,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:15,470 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:15,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:59:15,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:59:15,674 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:59:15,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 36908712, now seen corresponding path program 1 times [2024-11-14 03:59:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594539408] [2024-11-14 03:59:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:17,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:17,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594539408] [2024-11-14 03:59:17,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594539408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878455689] [2024-11-14 03:59:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:17,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:17,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:17,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:17,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:59:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:17,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 03:59:17,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:17,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:59:17,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:59:17,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:59:17,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 03:59:17,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 03:59:18,807 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:59:18,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 03:59:18,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:59:18,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-14 03:59:19,049 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-14 03:59:19,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2024-11-14 03:59:19,160 INFO L349 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2024-11-14 03:59:19,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 31 [2024-11-14 03:59:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:20,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:21,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878455689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:21,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97974678] [2024-11-14 03:59:21,194 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:59:21,194 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:21,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:21,195 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:21,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:21,507 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 50 for LOIs [2024-11-14 03:59:21,571 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 50 for LOIs [2024-11-14 03:59:21,594 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:59:21,611 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:31,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5333#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~l#1.base_32| Int)) (not (= (select |#valid| |v_ULTIMATE.start_loop_~l#1.base_32|) 1))))' at error location [2024-11-14 03:59:31,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:31,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:59:31,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2024-11-14 03:59:31,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928241951] [2024-11-14 03:59:31,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:31,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:59:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:59:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2486, Unknown=1, NotChecked=0, Total=2652 [2024-11-14 03:59:31,422 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 03:59:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:34,440 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2024-11-14 03:59:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:59:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2024-11-14 03:59:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:34,442 INFO L225 Difference]: With dead ends: 143 [2024-11-14 03:59:34,442 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 03:59:34,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=214, Invalid=3207, Unknown=1, NotChecked=0, Total=3422 [2024-11-14 03:59:34,444 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:34,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 600 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 03:59:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 03:59:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-11-14 03:59:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.6105263157894736) internal successors, (153), 119 states have internal predecessors, (153), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 03:59:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2024-11-14 03:59:34,452 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 29 [2024-11-14 03:59:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:34,452 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2024-11-14 03:59:34,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 03:59:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2024-11-14 03:59:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:59:34,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:34,454 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:34,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:59:34,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:34,658 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:59:34,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1144314172, now seen corresponding path program 1 times [2024-11-14 03:59:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683382214] [2024-11-14 03:59:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:59:34,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683382214] [2024-11-14 03:59:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683382214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:59:34,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:59:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:59:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810046763] [2024-11-14 03:59:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:59:34,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:59:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:59:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:59:34,919 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:35,569 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2024-11-14 03:59:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:59:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-14 03:59:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:35,571 INFO L225 Difference]: With dead ends: 159 [2024-11-14 03:59:35,571 INFO L226 Difference]: Without dead ends: 159 [2024-11-14 03:59:35,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:59:35,572 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 36 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:35,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 325 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:59:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-14 03:59:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2024-11-14 03:59:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 96 states have (on average 1.6041666666666667) internal successors, (154), 120 states have internal predecessors, (154), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 03:59:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2024-11-14 03:59:35,580 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 30 [2024-11-14 03:59:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:35,581 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2024-11-14 03:59:35,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2024-11-14 03:59:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:59:35,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:35,582 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:35,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 03:59:35,582 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:59:35,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1144310567, now seen corresponding path program 1 times [2024-11-14 03:59:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:35,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716203572] [2024-11-14 03:59:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:59:35,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716203572] [2024-11-14 03:59:35,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716203572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:59:35,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:59:35,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:59:35,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918035852] [2024-11-14 03:59:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:59:35,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:59:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:59:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:59:35,752 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:36,515 INFO L93 Difference]: Finished difference Result 172 states and 218 transitions. [2024-11-14 03:59:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:59:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-14 03:59:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:36,517 INFO L225 Difference]: With dead ends: 172 [2024-11-14 03:59:36,517 INFO L226 Difference]: Without dead ends: 172 [2024-11-14 03:59:36,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:59:36,518 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:36,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 184 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:59:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-14 03:59:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2024-11-14 03:59:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 107 states have (on average 1.6355140186915889) internal successors, (175), 130 states have internal predecessors, (175), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 03:59:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 207 transitions. [2024-11-14 03:59:36,527 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 207 transitions. Word has length 30 [2024-11-14 03:59:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:36,527 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 207 transitions. [2024-11-14 03:59:36,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 207 transitions. [2024-11-14 03:59:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:59:36,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:36,528 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:36,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-14 03:59:36,529 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:59:36,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1144310568, now seen corresponding path program 1 times [2024-11-14 03:59:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:36,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620528101] [2024-11-14 03:59:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:36,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:37,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620528101] [2024-11-14 03:59:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620528101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573637838] [2024-11-14 03:59:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:37,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:37,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:37,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:59:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:37,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:59:37,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:59:37,915 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:59:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573637838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:59:37,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:59:37,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-11-14 03:59:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402000907] [2024-11-14 03:59:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:59:37,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:59:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:59:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:59:37,917 INFO L87 Difference]: Start difference. First operand 153 states and 207 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:38,687 INFO L93 Difference]: Finished difference Result 181 states and 239 transitions. [2024-11-14 03:59:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:59:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-14 03:59:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:38,688 INFO L225 Difference]: With dead ends: 181 [2024-11-14 03:59:38,688 INFO L226 Difference]: Without dead ends: 181 [2024-11-14 03:59:38,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:59:38,692 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:38,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 334 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:59:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-14 03:59:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 161. [2024-11-14 03:59:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 115 states have (on average 1.6521739130434783) internal successors, (190), 138 states have internal predecessors, (190), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 03:59:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 222 transitions. [2024-11-14 03:59:38,702 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 222 transitions. Word has length 30 [2024-11-14 03:59:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:38,702 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 222 transitions. [2024-11-14 03:59:38,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:59:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 222 transitions. [2024-11-14 03:59:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:59:38,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:38,703 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:38,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:59:38,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:38,908 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 03:59:38,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2000230460, now seen corresponding path program 1 times [2024-11-14 03:59:38,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:38,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122469929] [2024-11-14 03:59:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:59:39,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122469929] [2024-11-14 03:59:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122469929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619170580] [2024-11-14 03:59:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:39,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:39,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:59:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:39,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:59:39,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:40,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 03:59:40,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-14 03:59:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:59:40,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:40,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-14 03:59:40,516 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 03:59:40,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-11-14 03:59:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:59:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619170580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872195460] [2024-11-14 03:59:40,581 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 03:59:40,581 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:40,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:40,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:40,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:41,446 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 52 for LOIs [2024-11-14 03:59:46,382 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 53 for LOIs [2024-11-14 03:59:46,417 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 03:59:46,431 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:00:15,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6957#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8) 0)) (not (= |ULTIMATE.start_loop_~l#1.base| 0)) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_main_~l~0#1.base|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_loop_~l#1.base|) 1) (= |ULTIMATE.start_loop_~l#1.offset| 0) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8)) 1)) (= |ULTIMATE.start_loop_internal_~l#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_loop_~l#1.base|) 8)) (<= 16 (select |#length| |ULTIMATE.start_loop_~l#1.base|)) (exists ((|v_#memory_$Pointer$.offset_303| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_305| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_37| Int)) (and (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= (store |v_#memory_$Pointer$.base_305| |v_ULTIMATE.start_create_~now~1#1.base_37| (store (select |v_#memory_$Pointer$.base_305| |v_ULTIMATE.start_create_~now~1#1.base_37|) 8 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_~now~1#1.base_37|) 8))) |#memory_$Pointer$.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~l~0#1.base| |v_ULTIMATE.start_create_~now~1#1.base_37|) (exists ((|v_#valid_276| (Array Int Int))) (= (select |v_#valid_276| |ULTIMATE.start_main_~l~0#1.base|) 0)) (exists ((v_create_internal_~now~0.offset_64 Int) (|v_#valid_277| (Array Int Int)) (|v_#memory_$Pointer$.offset_296| (Array Int (Array Int Int))) (|v_#length_241| (Array Int Int)) (v_create_internal_~now~0.base_69 Int) (|v_#memory_$Pointer$.base_298| (Array Int (Array Int Int)))) (and (= (store |v_#valid_277| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) 1) |#valid|) (<= (+ (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) 1) |#StackHeapBarrier|) (<= 0 v_create_internal_~now~0.offset_64) (not (= (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) 0)) (= (store (store |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) (store (select |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64)) 0 0)) v_create_internal_~now~0.base_69 (store (select (store |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) (store (select |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64)) 0 0)) v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64 (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64))) |v_#memory_$Pointer$.base_305|) (= (select |#valid| v_create_internal_~now~0.base_69) 1) (<= (+ v_create_internal_~now~0.offset_64 8) (select |#length| v_create_internal_~now~0.base_69)) (= (select |v_#valid_277| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64)) 0) (= |#length| (store |v_#length_241| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) 8)) (= |v_#memory_$Pointer$.offset_303| (store (store |v_#memory_$Pointer$.offset_296| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) (store (select |v_#memory_$Pointer$.offset_296| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64)) 0 0)) v_create_internal_~now~0.base_69 (store (select (store |v_#memory_$Pointer$.offset_296| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64) (store (select |v_#memory_$Pointer$.offset_296| (select (select |v_#memory_$Pointer$.base_305| v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64)) 0 0)) v_create_internal_~now~0.base_69) v_create_internal_~now~0.offset_64 0))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_303| |v_ULTIMATE.start_create_~now~1#1.base_37| (store (select |v_#memory_$Pointer$.offset_303| |v_ULTIMATE.start_create_~now~1#1.base_37|) 8 0))))))' at error location [2024-11-14 04:00:15,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:00:15,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:00:15,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 18 [2024-11-14 04:00:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057963930] [2024-11-14 04:00:15,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:00:15,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:00:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:00:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1853, Unknown=5, NotChecked=0, Total=1980 [2024-11-14 04:00:15,811 INFO L87 Difference]: Start difference. First operand 161 states and 222 transitions. Second operand has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:00:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:17,576 INFO L93 Difference]: Finished difference Result 175 states and 239 transitions. [2024-11-14 04:00:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:00:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2024-11-14 04:00:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:17,578 INFO L225 Difference]: With dead ends: 175 [2024-11-14 04:00:17,578 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 04:00:17,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=133, Invalid=2024, Unknown=5, NotChecked=0, Total=2162 [2024-11-14 04:00:17,579 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 33 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:17,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 658 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:00:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 04:00:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2024-11-14 04:00:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 120 states have (on average 1.6416666666666666) internal successors, (197), 143 states have internal predecessors, (197), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 04:00:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 229 transitions. [2024-11-14 04:00:17,588 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 229 transitions. Word has length 33 [2024-11-14 04:00:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:17,588 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 229 transitions. [2024-11-14 04:00:17,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:00:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 229 transitions. [2024-11-14 04:00:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:00:17,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:17,589 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:17,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:00:17,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:17,790 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:00:17,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2000230459, now seen corresponding path program 1 times [2024-11-14 04:00:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:17,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705147852] [2024-11-14 04:00:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:17,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:00:19,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705147852] [2024-11-14 04:00:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705147852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:00:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261008596] [2024-11-14 04:00:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:00:19,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:00:19,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:00:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:19,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 04:00:19,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:00:20,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:00:20,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:00:21,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-14 04:00:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:00:21,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:00:21,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-14 04:00:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:00:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:00:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:00:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:00:22,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:00:22,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2024-11-14 04:00:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:00:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261008596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:00:23,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986320569] [2024-11-14 04:00:23,219 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 04:00:23,221 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:00:23,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:00:23,221 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:00:23,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:00:24,031 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 52 for LOIs [2024-11-14 04:00:28,710 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 55 for LOIs [2024-11-14 04:00:28,730 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-14 04:00:28,744 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:10,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7561#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8) 0)) (not (= |ULTIMATE.start_loop_~l#1.base| 0)) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_main_~l~0#1.base|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_loop_~l#1.base|) 1) (<= (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8)) (+ 7 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_loop_~l#1.base|) 8))) (= |ULTIMATE.start_loop_~l#1.offset| 0) (<= 16 (select |#length| |ULTIMATE.start_loop_~l#1.base|)) (exists ((|v_ULTIMATE.start_create_~now~1#1.base_40| Int) (|v_#memory_$Pointer$.offset_349| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_351| (Array Int (Array Int Int)))) (and (exists ((|v_#valid_307| (Array Int Int))) (= (select |v_#valid_307| |ULTIMATE.start_main_~l~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_349| |v_ULTIMATE.start_create_~now~1#1.base_40| (store (select |v_#memory_$Pointer$.offset_349| |v_ULTIMATE.start_create_~now~1#1.base_40|) 8 0))) (exists ((|v_#length_272| (Array Int Int)) (v_create_internal_~now~0.base_82 Int) (|v_#memory_$Pointer$.base_344| (Array Int (Array Int Int))) (v_create_internal_~now~0.offset_79 Int) (|v_#memory_$Pointer$.offset_342| (Array Int (Array Int Int))) (|v_#valid_308| (Array Int Int))) (and (= (select |v_#valid_308| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79)) 0) (= (store (store |v_#memory_$Pointer$.base_344| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) (store (select |v_#memory_$Pointer$.base_344| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79)) 0 0)) v_create_internal_~now~0.base_82 (store (select (store |v_#memory_$Pointer$.base_344| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) (store (select |v_#memory_$Pointer$.base_344| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79)) 0 0)) v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79 (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79))) |v_#memory_$Pointer$.base_351|) (= (select |#valid| v_create_internal_~now~0.base_82) 1) (<= (+ (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) 1) |#StackHeapBarrier|) (= (store (store |v_#memory_$Pointer$.offset_342| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) (store (select |v_#memory_$Pointer$.offset_342| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79)) 0 0)) v_create_internal_~now~0.base_82 (store (select (store |v_#memory_$Pointer$.offset_342| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) (store (select |v_#memory_$Pointer$.offset_342| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79)) 0 0)) v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79 0)) |v_#memory_$Pointer$.offset_349|) (<= 0 v_create_internal_~now~0.offset_79) (= |#length| (store |v_#length_272| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) 8)) (<= (+ v_create_internal_~now~0.offset_79 8) (select |#length| v_create_internal_~now~0.base_82)) (= (store |v_#valid_308| (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) 1) |#valid|) (not (= (select (select |v_#memory_$Pointer$.base_351| v_create_internal_~now~0.base_82) v_create_internal_~now~0.offset_79) 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~l~0#1.base| |v_ULTIMATE.start_create_~now~1#1.base_40|) (= (store |v_#memory_$Pointer$.base_351| |v_ULTIMATE.start_create_~now~1#1.base_40| (store (select |v_#memory_$Pointer$.base_351| |v_ULTIMATE.start_create_~now~1#1.base_40|) 8 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_~now~1#1.base_40|) 8))) |#memory_$Pointer$.base|))))' at error location [2024-11-14 04:01:10,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:10,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:10,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 40 [2024-11-14 04:01:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42372406] [2024-11-14 04:01:10,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:10,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:01:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:01:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4198, Unknown=10, NotChecked=0, Total=4422 [2024-11-14 04:01:10,907 INFO L87 Difference]: Start difference. First operand 166 states and 229 transitions. Second operand has 41 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 33 states have internal predecessors, (67), 6 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (11), 11 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 04:01:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:19,913 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2024-11-14 04:01:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:01:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 33 states have internal predecessors, (67), 6 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (11), 11 states have call predecessors, (11), 6 states have call successors, (11) Word has length 33 [2024-11-14 04:01:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:19,916 INFO L225 Difference]: With dead ends: 175 [2024-11-14 04:01:19,916 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 04:01:19,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=297, Invalid=5699, Unknown=10, NotChecked=0, Total=6006 [2024-11-14 04:01:19,919 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:19,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 896 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 04:01:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 04:01:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2024-11-14 04:01:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 120 states have (on average 1.6333333333333333) internal successors, (196), 143 states have internal predecessors, (196), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-14 04:01:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 228 transitions. [2024-11-14 04:01:19,933 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 228 transitions. Word has length 33 [2024-11-14 04:01:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:19,933 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 228 transitions. [2024-11-14 04:01:19,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 33 states have internal predecessors, (67), 6 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (11), 11 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 04:01:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 228 transitions. [2024-11-14 04:01:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:01:19,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:19,934 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:19,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:01:20,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:20,135 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:01:20,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash -459178490, now seen corresponding path program 2 times [2024-11-14 04:01:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:20,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224242826] [2024-11-14 04:01:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:20,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:01:23,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:23,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224242826] [2024-11-14 04:01:23,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224242826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:23,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762885231] [2024-11-14 04:01:23,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:01:23,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:23,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:23,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:01:23,523 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:01:23,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:01:23,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:01:23,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:23,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:01:23,682 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-14 04:01:24,370 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-14 04:01:32,873 WARN L286 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 497 DAG size of output: 146 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 04:01:32,873 INFO L349 Elim1Store]: treesize reduction 1483, result has 16.9 percent of original size [2024-11-14 04:01:32,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 83 case distinctions, treesize of input 131 treesize of output 628 [2024-11-14 04:11:04,760 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 04:11:04,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-14 04:11:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137811331] [2024-11-14 04:11:04,762 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 04:11:04,762 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:04,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:04,762 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:04,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:04,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2024-11-14 04:11:04,765 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-14 04:11:04,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:11:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-14 04:11:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724044723] [2024-11-14 04:11:04,770 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:04,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:11:04,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:11:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=276, Unknown=2, NotChecked=70, Total=420 [2024-11-14 04:11:04,772 INFO L87 Difference]: Start difference. First operand 166 states and 228 transitions. Second operand has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 04:11:04,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=276, Unknown=2, NotChecked=70, Total=420 [2024-11-14 04:11:04,776 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:04,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:11:04,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:11:04,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:04,978 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2024-11-14 04:11:04,980 INFO L158 Benchmark]: Toolchain (without parser) took 816942.91ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 90.6MB in the beginning and 781.9MB in the end (delta: -691.4MB). Peak memory consumption was 772.5MB. Max. memory is 16.1GB. [2024-11-14 04:11:04,980 INFO L158 Benchmark]: CDTParser took 2.11ms. Allocated memory is still 117.4MB. Free memory was 74.5MB in the beginning and 74.3MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:11:04,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 539.88ms. Allocated memory is still 117.4MB. Free memory was 90.3MB in the beginning and 71.3MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:11:04,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.80ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 69.6MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:11:04,982 INFO L158 Benchmark]: Boogie Preprocessor took 44.84ms. Allocated memory is still 117.4MB. Free memory was 69.4MB in the beginning and 68.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:11:04,982 INFO L158 Benchmark]: RCFGBuilder took 1023.60ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 40.7MB in the end (delta: 27.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-14 04:11:04,983 INFO L158 Benchmark]: TraceAbstraction took 815273.77ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 40.2MB in the beginning and 781.9MB in the end (delta: -741.7MB). Peak memory consumption was 722.2MB. Max. memory is 16.1GB. [2024-11-14 04:11:04,984 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.11ms. Allocated memory is still 117.4MB. Free memory was 74.5MB in the beginning and 74.3MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 539.88ms. Allocated memory is still 117.4MB. Free memory was 90.3MB in the beginning and 71.3MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.80ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 69.6MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.84ms. Allocated memory is still 117.4MB. Free memory was 69.4MB in the beginning and 68.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1023.60ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 40.7MB in the end (delta: 27.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 815273.77ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 40.2MB in the beginning and 781.9MB in the end (delta: -741.7MB). Peak memory consumption was 722.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/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_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/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 64bit --witnessprinter.graph.data.programhash 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:11:07,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:11:07,682 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2024-11-14 04:11:07,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:11:07,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:11:07,716 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:11:07,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:11:07,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:11:07,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:11:07,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:11:07,746 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:11:07,746 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:11:07,747 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:11:07,747 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:11:07,747 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:11:07,747 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:11:07,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:11:07,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:11:07,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:11:07,748 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:11:07,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:11:07,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:11:07,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:11:07,755 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 04:11:07,755 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:07,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:11:07,755 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:11:07,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e [2024-11-14 04:11:08,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:11:08,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:11:08,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:11:08,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:11:08,139 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:11:08,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i Unable to find full path for "g++" [2024-11-14 04:11:10,236 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:11:10,591 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:11:10,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2024-11-14 04:11:10,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/3889bd2a1/b211ea4da3634bfea089c50780ecb438/FLAGb304b8759 [2024-11-14 04:11:10,657 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/data/3889bd2a1/b211ea4da3634bfea089c50780ecb438 [2024-11-14 04:11:10,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:11:10,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:11:10,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:10,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:11:10,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:11:10,678 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:10" (1/1) ... [2024-11-14 04:11:10,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e6a6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:10, skipping insertion in model container [2024-11-14 04:11:10,679 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:10" (1/1) ... [2024-11-14 04:11:10,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:11:11,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:11,189 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:11:11,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:11,316 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:11:11,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11 WrapperNode [2024-11-14 04:11:11,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:11,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:11,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:11:11,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:11:11,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,352 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,385 INFO L138 Inliner]: procedures = 123, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 84 [2024-11-14 04:11:11,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:11,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:11:11,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:11:11,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:11:11,399 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:11:11,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:11:11,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:11:11,431 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:11:11,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (1/1) ... [2024-11-14 04:11:11,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:11:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:11,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:11:11,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:11:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-14 04:11:11,507 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-14 04:11:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2024-11-14 04:11:11,507 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-14 04:11:11,508 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:11:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:11:11,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:11:11,682 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:11:11,684 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:11:12,374 INFO L? ?]: Removed 110 outVars from TransFormulas that were not future-live. [2024-11-14 04:11:12,375 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:11:12,394 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:11:12,396 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 04:11:12,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:12 BoogieIcfgContainer [2024-11-14 04:11:12,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:11:12,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:11:12,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:11:12,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:11:12,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:11:10" (1/3) ... [2024-11-14 04:11:12,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9990a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:12, skipping insertion in model container [2024-11-14 04:11:12,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:11" (2/3) ... [2024-11-14 04:11:12,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9990a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:12, skipping insertion in model container [2024-11-14 04:11:12,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:12" (3/3) ... [2024-11-14 04:11:12,411 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll.i [2024-11-14 04:11:12,425 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:11:12,427 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-nested-sll.i that has 4 procedures, 111 locations, 1 initial locations, 6 loop locations, and 39 error locations. [2024-11-14 04:11:12,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:11:12,483 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;@3095d83b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:11:12,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-14 04:11:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 101 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:11:12,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:12,496 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:11:12,496 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:12,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 37431913, now seen corresponding path program 1 times [2024-11-14 04:11:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487110380] [2024-11-14 04:11:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:12,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:12,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:12,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:12,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 04:11:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:12,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:11:12,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:12,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:12,729 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 04:11:12,730 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:12,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487110380] [2024-11-14 04:11:12,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487110380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:12,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:12,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:11:12,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617020026] [2024-11-14 04:11:12,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:12,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:12,764 INFO L87 Difference]: Start difference. First operand has 111 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 101 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:11:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:12,996 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2024-11-14 04:11:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 04:11:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:13,004 INFO L225 Difference]: With dead ends: 109 [2024-11-14 04:11:13,005 INFO L226 Difference]: Without dead ends: 107 [2024-11-14 04:11:13,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:11:13,009 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:13,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 186 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-14 04:11:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-14 04:11:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 97 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2024-11-14 04:11:13,048 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 5 [2024-11-14 04:11:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:13,048 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2024-11-14 04:11:13,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:11:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2024-11-14 04:11:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:11:13,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:13,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:11:13,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 04:11:13,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:13,252 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:13,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash 37431914, now seen corresponding path program 1 times [2024-11-14 04:11:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630684781] [2024-11-14 04:11:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:13,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:13,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:13,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:13,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 04:11:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:13,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:11:13,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:13,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:13,377 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 04:11:13,378 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:13,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:13,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630684781] [2024-11-14 04:11:13,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630684781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:13,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:13,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:11:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446336655] [2024-11-14 04:11:13,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:13,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:13,383 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:11:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:13,733 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2024-11-14 04:11:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 04:11:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:13,736 INFO L225 Difference]: With dead ends: 105 [2024-11-14 04:11:13,736 INFO L226 Difference]: Without dead ends: 105 [2024-11-14 04:11:13,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:11:13,739 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:13,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 190 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:11:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-14 04:11:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-14 04:11:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 95 states have internal predecessors, (101), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2024-11-14 04:11:13,757 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 5 [2024-11-14 04:11:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:13,757 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2024-11-14 04:11:13,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:11:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2024-11-14 04:11:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:11:13,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:13,759 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:13,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 04:11:13,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:13,960 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:13,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1899324441, now seen corresponding path program 1 times [2024-11-14 04:11:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680728755] [2024-11-14 04:11:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:13,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:13,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 04:11:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:14,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:11:14,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:14,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:14,072 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 04:11:14,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:14,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680728755] [2024-11-14 04:11:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680728755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:14,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:14,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:11:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33489874] [2024-11-14 04:11:14,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:14,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:14,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:14,075 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:11:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:14,318 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2024-11-14 04:11:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 04:11:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:14,320 INFO L225 Difference]: With dead ends: 104 [2024-11-14 04:11:14,320 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 04:11:14,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:11:14,322 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:14,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 04:11:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-14 04:11:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.639344262295082) internal successors, (100), 94 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2024-11-14 04:11:14,331 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 14 [2024-11-14 04:11:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:14,337 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2024-11-14 04:11:14,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:11:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2024-11-14 04:11:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:11:14,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:14,338 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:14,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 04:11:14,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:14,541 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:14,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1899324440, now seen corresponding path program 1 times [2024-11-14 04:11:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:14,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324070527] [2024-11-14 04:11:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:14,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 04:11:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:14,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:11:14,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:14,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:14,672 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 04:11:14,673 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:14,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324070527] [2024-11-14 04:11:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324070527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:14,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:11:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496388019] [2024-11-14 04:11:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:14,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:14,675 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:11:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:14,970 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2024-11-14 04:11:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 04:11:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:14,972 INFO L225 Difference]: With dead ends: 103 [2024-11-14 04:11:14,973 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 04:11:14,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:11:14,973 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:14,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 188 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:11:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 04:11:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-14 04:11:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.6229508196721312) internal successors, (99), 93 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2024-11-14 04:11:14,982 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 14 [2024-11-14 04:11:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:14,982 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2024-11-14 04:11:14,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:11:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2024-11-14 04:11:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:11:14,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:14,983 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:14,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 04:11:15,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:15,184 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:15,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 166995789, now seen corresponding path program 1 times [2024-11-14 04:11:15,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:15,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957015841] [2024-11-14 04:11:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:15,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:15,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 04:11:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:15,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:11:15,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:15,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:15,469 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)))) is different from true [2024-11-14 04:11:15,573 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:11:15,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 04:11:15,604 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 04:11:15,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:15,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:15,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957015841] [2024-11-14 04:11:15,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957015841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:15,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:15,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:11:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901038240] [2024-11-14 04:11:15,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:15,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:11:15,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:11:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2024-11-14 04:11:15,607 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:16,203 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2024-11-14 04:11:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:11:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-11-14 04:11:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:16,206 INFO L225 Difference]: With dead ends: 113 [2024-11-14 04:11:16,206 INFO L226 Difference]: Without dead ends: 113 [2024-11-14 04:11:16,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2024-11-14 04:11:16,208 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 8 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:16,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 376 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2024-11-14 04:11:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-14 04:11:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2024-11-14 04:11:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 04:11:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2024-11-14 04:11:16,221 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 24 [2024-11-14 04:11:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:16,221 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2024-11-14 04:11:16,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2024-11-14 04:11:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:11:16,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:16,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:16,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 04:11:16,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:16,427 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:16,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 166995790, now seen corresponding path program 1 times [2024-11-14 04:11:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712371818] [2024-11-14 04:11:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:16,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:16,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:16,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:16,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-14 04:11:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:16,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:11:16,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:16,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:16,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:16,931 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-14 04:11:17,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:17,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:17,096 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:17,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-14 04:11:17,132 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 04:11:17,133 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:17,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712371818] [2024-11-14 04:11:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712371818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:11:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944684281] [2024-11-14 04:11:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:17,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:11:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:11:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2024-11-14 04:11:17,135 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:17,935 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2024-11-14 04:11:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:11:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-11-14 04:11:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:17,937 INFO L225 Difference]: With dead ends: 114 [2024-11-14 04:11:17,937 INFO L226 Difference]: Without dead ends: 114 [2024-11-14 04:11:17,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2024-11-14 04:11:17,938 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 11 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:17,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 348 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 267 Invalid, 0 Unknown, 196 Unchecked, 0.8s Time] [2024-11-14 04:11:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-14 04:11:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2024-11-14 04:11:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 97 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 04:11:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2024-11-14 04:11:17,952 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 24 [2024-11-14 04:11:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:17,957 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2024-11-14 04:11:17,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2024-11-14 04:11:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:11:17,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:17,962 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:17,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-14 04:11:18,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:18,162 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:18,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1764761172, now seen corresponding path program 1 times [2024-11-14 04:11:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:18,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419866265] [2024-11-14 04:11:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:18,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:18,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:18,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:18,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-14 04:11:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:18,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:11:18,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:18,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:18,418 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)))) is different from true [2024-11-14 04:11:18,453 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:11:18,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 04:11:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:18,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:18,700 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419866265] [2024-11-14 04:11:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419866265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [208911795] [2024-11-14 04:11:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:11:18,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:11:18,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-14 04:11:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:18,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:11:18,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:18,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:19,008 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:11:19,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 04:11:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:19,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [208911795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773097738] [2024-11-14 04:11:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:19,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:19,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:19,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:19,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:11:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:19,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:11:19,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:19,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:19,459 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-14 04:11:19,517 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 04:11:19,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 04:11:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:19,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773097738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:19,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 04:11:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2024-11-14 04:11:19,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776141964] [2024-11-14 04:11:19,781 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:19,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:11:19,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:11:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2024-11-14 04:11:19,782 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:11:22,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 04:11:24,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 04:11:26,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 04:11:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:26,617 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2024-11-14 04:11:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:11:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2024-11-14 04:11:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:26,619 INFO L225 Difference]: With dead ends: 109 [2024-11-14 04:11:26,619 INFO L226 Difference]: Without dead ends: 109 [2024-11-14 04:11:26,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=104, Unknown=2, NotChecked=42, Total=182 [2024-11-14 04:11:26,620 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 29 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:26,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 393 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 246 Invalid, 3 Unknown, 232 Unchecked, 6.7s Time] [2024-11-14 04:11:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-14 04:11:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-14 04:11:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 97 states have internal predecessors, (105), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 04:11:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2024-11-14 04:11:26,632 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 27 [2024-11-14 04:11:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:26,632 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2024-11-14 04:11:26,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:11:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2024-11-14 04:11:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:11:26,636 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:26,636 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:26,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:26,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-11-14 04:11:27,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:27,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:27,237 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:27,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1764761173, now seen corresponding path program 1 times [2024-11-14 04:11:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053512958] [2024-11-14 04:11:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:27,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:27,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:27,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:27,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-11-14 04:11:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:27,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:11:27,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:27,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:27,531 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (_ bv8 64)) |c_#length|)) is different from true [2024-11-14 04:11:27,569 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 04:11:27,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-14 04:11:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:27,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:27,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:27,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053512958] [2024-11-14 04:11:27,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053512958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558650190] [2024-11-14 04:11:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:11:27,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:11:27,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-14 04:11:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:28,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:11:28,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:28,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:28,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:28,416 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-14 04:11:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:28,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:28,484 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:28,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-14 04:11:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:28,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558650190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:28,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566236480] [2024-11-14 04:11:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:28,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:28,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:28,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:11:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:28,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:11:28,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:28,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:28,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:29,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:29,165 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:29,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-14 04:11:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-14 04:11:29,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566236480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:29,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:29,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2024-11-14 04:11:29,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760015851] [2024-11-14 04:11:29,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:29,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:11:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:11:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=174, Unknown=2, NotChecked=54, Total=272 [2024-11-14 04:11:29,467 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 04:11:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:30,724 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2024-11-14 04:11:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:11:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2024-11-14 04:11:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:30,725 INFO L225 Difference]: With dead ends: 111 [2024-11-14 04:11:30,725 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 04:11:30,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=226, Unknown=4, NotChecked=62, Total=342 [2024-11-14 04:11:30,726 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:30,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 593 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 367 Invalid, 0 Unknown, 234 Unchecked, 1.0s Time] [2024-11-14 04:11:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 04:11:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-14 04:11:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.536231884057971) internal successors, (106), 99 states have internal predecessors, (106), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 04:11:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2024-11-14 04:11:30,742 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 27 [2024-11-14 04:11:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:30,743 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2024-11-14 04:11:30,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 04:11:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2024-11-14 04:11:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:11:30,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:30,744 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:30,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:30,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:11:31,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2024-11-14 04:11:31,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:31,345 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:31,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1620249651, now seen corresponding path program 1 times [2024-11-14 04:11:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284881600] [2024-11-14 04:11:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:31,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:31,347 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:31,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-11-14 04:11:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:31,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:11:31,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:31,550 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 04:11:31,550 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:31,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284881600] [2024-11-14 04:11:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284881600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:31,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:31,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:11:31,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814770026] [2024-11-14 04:11:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:31,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:11:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:11:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:11:31,552 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:32,063 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2024-11-14 04:11:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:11:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-14 04:11:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:32,065 INFO L225 Difference]: With dead ends: 132 [2024-11-14 04:11:32,066 INFO L226 Difference]: Without dead ends: 132 [2024-11-14 04:11:32,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:11:32,068 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 27 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:32,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 339 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:11:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-14 04:11:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2024-11-14 04:11:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.5595238095238095) internal successors, (131), 113 states have internal predecessors, (131), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2024-11-14 04:11:32,081 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 31 [2024-11-14 04:11:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:32,082 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2024-11-14 04:11:32,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2024-11-14 04:11:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:11:32,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:32,084 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:32,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-11-14 04:11:32,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:32,285 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:32,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1620249650, now seen corresponding path program 1 times [2024-11-14 04:11:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956051074] [2024-11-14 04:11:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:32,288 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:32,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-14 04:11:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:32,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:11:32,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:32,582 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 04:11:32,582 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:32,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956051074] [2024-11-14 04:11:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956051074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:11:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281385729] [2024-11-14 04:11:32,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:32,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:11:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:11:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:11:32,583 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:33,346 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2024-11-14 04:11:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:11:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-14 04:11:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:33,348 INFO L225 Difference]: With dead ends: 141 [2024-11-14 04:11:33,348 INFO L226 Difference]: Without dead ends: 141 [2024-11-14 04:11:33,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:11:33,348 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 22 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:33,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 609 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:11:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-14 04:11:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-11-14 04:11:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 94 states have (on average 1.5425531914893618) internal successors, (145), 123 states have internal predecessors, (145), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2024-11-14 04:11:33,355 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 31 [2024-11-14 04:11:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:33,355 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2024-11-14 04:11:33,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2024-11-14 04:11:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:11:33,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:33,357 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:33,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-11-14 04:11:33,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:33,557 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:33,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2013182251, now seen corresponding path program 1 times [2024-11-14 04:11:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029246234] [2024-11-14 04:11:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:33,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:33,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:33,560 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:33,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-14 04:11:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:33,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:11:33,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:33,812 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 04:11:33,812 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:33,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:33,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029246234] [2024-11-14 04:11:33,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029246234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:33,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:11:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235948394] [2024-11-14 04:11:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:33,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:11:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:11:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:11:33,814 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:34,017 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2024-11-14 04:11:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:11:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-14 04:11:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:34,018 INFO L225 Difference]: With dead ends: 147 [2024-11-14 04:11:34,019 INFO L226 Difference]: Without dead ends: 147 [2024-11-14 04:11:34,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:11:34,019 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 27 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:34,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 657 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-14 04:11:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2024-11-14 04:11:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 124 states have internal predecessors, (144), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 165 transitions. [2024-11-14 04:11:34,026 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 165 transitions. Word has length 33 [2024-11-14 04:11:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:34,026 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 165 transitions. [2024-11-14 04:11:34,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 165 transitions. [2024-11-14 04:11:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:11:34,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:34,028 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:34,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-11-14 04:11:34,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:34,232 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:34,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2014848460, now seen corresponding path program 1 times [2024-11-14 04:11:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832545421] [2024-11-14 04:11:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:34,234 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:34,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-11-14 04:11:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:34,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 04:11:34,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:34,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:34,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:11:34,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:11:34,724 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 04:11:34,724 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:34,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:34,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832545421] [2024-11-14 04:11:34,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832545421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:34,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:34,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-14 04:11:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598332461] [2024-11-14 04:11:34,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:34,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:11:34,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:11:34,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:11:34,726 INFO L87 Difference]: Start difference. First operand 138 states and 165 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:36,121 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2024-11-14 04:11:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:11:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-14 04:11:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:36,123 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:11:36,123 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 04:11:36,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:11:36,124 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 32 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:36,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 687 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:11:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 04:11:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2024-11-14 04:11:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 134 states have internal predecessors, (157), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2024-11-14 04:11:36,131 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 34 [2024-11-14 04:11:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:36,132 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2024-11-14 04:11:36,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2024-11-14 04:11:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:11:36,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:36,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:36,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-11-14 04:11:36,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:36,337 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:36,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2014848459, now seen corresponding path program 1 times [2024-11-14 04:11:36,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:36,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546833726] [2024-11-14 04:11:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:36,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:36,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-14 04:11:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:36,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 04:11:36,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:36,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:36,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:11:36,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 04:11:37,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-14 04:11:37,194 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 04:11:37,194 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:37,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:37,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546833726] [2024-11-14 04:11:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546833726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:37,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:37,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-14 04:11:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552432201] [2024-11-14 04:11:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:37,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:11:37,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:11:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:11:37,196 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:38,869 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2024-11-14 04:11:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:11:38,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-14 04:11:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:38,871 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:11:38,871 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 04:11:38,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:11:38,872 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:38,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 746 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:11:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 04:11:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2024-11-14 04:11:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 105 states have (on average 1.4857142857142858) internal successors, (156), 134 states have internal predecessors, (156), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-11-14 04:11:38,879 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 34 [2024-11-14 04:11:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:38,879 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-11-14 04:11:38,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:11:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-11-14 04:11:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:11:38,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:38,881 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:38,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-11-14 04:11:39,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:39,085 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:39,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash 85174448, now seen corresponding path program 1 times [2024-11-14 04:11:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:39,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180749447] [2024-11-14 04:11:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:39,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:39,087 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-11-14 04:11:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:39,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 04:11:39,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:39,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:39,311 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-14 04:11:39,419 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 04:11:39,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 04:11:39,451 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (_ bv1 1)))) is different from true [2024-11-14 04:11:39,486 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:11:39,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 04:11:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-14 04:11:39,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:39,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180749447] [2024-11-14 04:11:39,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180749447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [780940509] [2024-11-14 04:11:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:11:39,926 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:11:39,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-14 04:11:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:40,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:11:40,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:40,218 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:11:40,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 04:11:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:40,239 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:40,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [780940509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:40,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:11:40,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 8 [2024-11-14 04:11:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373719134] [2024-11-14 04:11:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:40,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:11:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 04:11:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:11:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2024-11-14 04:11:40,241 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:11:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:40,504 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2024-11-14 04:11:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:11:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-14 04:11:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:40,506 INFO L225 Difference]: With dead ends: 148 [2024-11-14 04:11:40,507 INFO L226 Difference]: Without dead ends: 148 [2024-11-14 04:11:40,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2024-11-14 04:11:40,507 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 5 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:40,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 216 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2024-11-14 04:11:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-14 04:11:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-11-14 04:11:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 105 states have (on average 1.4761904761904763) internal successors, (155), 134 states have internal predecessors, (155), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 04:11:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 176 transitions. [2024-11-14 04:11:40,518 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 176 transitions. Word has length 35 [2024-11-14 04:11:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:40,519 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 176 transitions. [2024-11-14 04:11:40,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:11:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 176 transitions. [2024-11-14 04:11:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:11:40,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:40,521 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:40,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-14 04:11:40,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-11-14 04:11:40,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:40,922 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-14 04:11:40,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash 85174449, now seen corresponding path program 1 times [2024-11-14 04:11:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 04:11:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293376370] [2024-11-14 04:11:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 04:11:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 04:11:40,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 04:11:40,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-11-14 04:11:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:41,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:11:41,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:41,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:41,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:41,306 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-14 04:11:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:41,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:41,429 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:41,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-14 04:11:41,510 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-14 04:11:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:41,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:41,573 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:41,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-14 04:11:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-14 04:11:41,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:41,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 04:11:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293376370] [2024-11-14 04:11:41,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293376370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1784411296] [2024-11-14 04:11:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:41,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 04:11:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 04:11:41,875 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 04:11:41,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dae7a013-bfea-4e54-a80a-238a3a9940c8/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-14 04:11:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:42,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:11:42,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:42,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:11:42,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-14 04:11:42,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:11:42,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:11:42,390 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 04:11:42,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13