./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 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2 --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 0.2.5-dev-4fc63b2 [2024-11-02 11:25:54,018 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:54,120 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-02 11:25:54,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:54,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:54,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:54,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:54,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:54,161 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:54,162 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:54,165 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:54,165 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:54,166 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:54,168 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:54,169 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:54,169 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:54,169 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:54,170 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:54,170 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:54,171 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:54,175 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:54,176 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:54,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 11:25:54,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 11:25:54,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:54,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:54,178 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:54,178 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 11:25:54,178 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 11:25:54,178 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 11:25:54,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:54,180 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 11:25:54,181 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:54,182 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 11:25:54,182 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:54,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:54,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:54,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:54,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:54,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:54,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:54,184 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:54,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:54,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:54,186 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:54,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:54,186 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e [2024-11-02 11:25:54,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:54,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:54,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:54,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:54,563 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:54,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i Unable to find full path for "g++" [2024-11-02 11:25:56,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:56,902 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:56,903 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2024-11-02 11:25:56,927 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/data/46f7ce054/ece769eb4efd49c685ce8c165317507f/FLAG05ffba3da [2024-11-02 11:25:56,945 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/data/46f7ce054/ece769eb4efd49c685ce8c165317507f [2024-11-02 11:25:56,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:56,951 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:56,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:56,953 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:56,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:56,963 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:56" (1/1) ... [2024-11-02 11:25:56,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5715ec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:56, skipping insertion in model container [2024-11-02 11:25:56,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:56" (1/1) ... [2024-11-02 11:25:57,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:57,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:57,416 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:57,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:57,522 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:57,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57 WrapperNode [2024-11-02 11:25:57,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:57,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:57,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:57,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:57,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,577 INFO L138 Inliner]: procedures = 122, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 89 [2024-11-02 11:25:57,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:57,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:57,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:57,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:57,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:57,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:57,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:57,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:57,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:57,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:57,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:57,704 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-02 11:25:57,704 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-02 11:25:57,704 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2024-11-02 11:25:57,704 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2024-11-02 11:25:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-02 11:25:57,705 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-02 11:25:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:25:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:25:57,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:25:57,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:25:57,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:57,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:57,840 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:57,843 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:58,315 INFO L? ?]: Removed 110 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:58,315 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:58,413 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:58,414 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 11:25:58,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:58 BoogieIcfgContainer [2024-11-02 11:25:58,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:58,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:58,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:58,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:58,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:56" (1/3) ... [2024-11-02 11:25:58,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507bf612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:58, skipping insertion in model container [2024-11-02 11:25:58,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57" (2/3) ... [2024-11-02 11:25:58,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507bf612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:58, skipping insertion in model container [2024-11-02 11:25:58,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:58" (3/3) ... [2024-11-02 11:25:58,426 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll.i [2024-11-02 11:25:58,447 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:58,447 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2024-11-02 11:25:58,506 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:58,514 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;@2b413572, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:58,515 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-02 11:25:58,524 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) [2024-11-02 11:25:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 11:25:58,533 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:58,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 11:25:58,534 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)] === [2024-11-02 11:25:58,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 6991277, now seen corresponding path program 1 times [2024-11-02 11:25:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506197589] [2024-11-02 11:25:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:58,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506197589] [2024-11-02 11:25:58,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506197589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:58,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:58,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059266315] [2024-11-02 11:25:58,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:58,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:58,968 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) [2024-11-02 11:25:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:59,115 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2024-11-02 11:25:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:59,118 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 [2024-11-02 11:25:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:59,127 INFO L225 Difference]: With dead ends: 85 [2024-11-02 11:25:59,128 INFO L226 Difference]: Without dead ends: 84 [2024-11-02 11:25:59,130 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 [2024-11-02 11:25:59,135 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 [2024-11-02 11:25:59,136 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] [2024-11-02 11:25:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-02 11:25:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-02 11:25:59,185 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) [2024-11-02 11:25:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2024-11-02 11:25:59,190 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 4 [2024-11-02 11:25:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:59,191 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2024-11-02 11:25:59,191 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) [2024-11-02 11:25:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2024-11-02 11:25:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 11:25:59,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,192 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 11:25:59,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:25:59,195 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)] === [2024-11-02 11:25:59,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 6991278, now seen corresponding path program 1 times [2024-11-02 11:25:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865077322] [2024-11-02 11:25:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:59,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865077322] [2024-11-02 11:25:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865077322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:59,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:59,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111906065] [2024-11-02 11:25:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:59,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:59,346 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) [2024-11-02 11:25:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:59,439 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2024-11-02 11:25:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:59,439 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 [2024-11-02 11:25:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:59,441 INFO L225 Difference]: With dead ends: 82 [2024-11-02 11:25:59,441 INFO L226 Difference]: Without dead ends: 82 [2024-11-02 11:25:59,441 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 [2024-11-02 11:25:59,442 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 [2024-11-02 11:25:59,443 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] [2024-11-02 11:25:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-02 11:25:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-02 11:25:59,450 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) [2024-11-02 11:25:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-11-02 11:25:59,452 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 4 [2024-11-02 11:25:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:59,452 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-11-02 11:25:59,452 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) [2024-11-02 11:25:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-11-02 11:25:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 11:25:59,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,453 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:59,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:25:59,454 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)] === [2024-11-02 11:25:59,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -939442667, now seen corresponding path program 1 times [2024-11-02 11:25:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432658964] [2024-11-02 11:25:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:59,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:59,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432658964] [2024-11-02 11:25:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432658964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:59,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:59,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713719805] [2024-11-02 11:25:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:59,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:59,542 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) [2024-11-02 11:25:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:59,647 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2024-11-02 11:25:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:59,649 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 [2024-11-02 11:25:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:59,650 INFO L225 Difference]: With dead ends: 81 [2024-11-02 11:25:59,650 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 11:25:59,651 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 [2024-11-02 11:25:59,652 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 [2024-11-02 11:25:59,654 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] [2024-11-02 11:25:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 11:25:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-02 11:25:59,667 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) [2024-11-02 11:25:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2024-11-02 11:25:59,671 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2024-11-02 11:25:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:59,672 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2024-11-02 11:25:59,672 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) [2024-11-02 11:25:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2024-11-02 11:25:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 11:25:59,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,674 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:59,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:25:59,674 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)] === [2024-11-02 11:25:59,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -939442666, now seen corresponding path program 1 times [2024-11-02 11:25:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125023388] [2024-11-02 11:25:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:59,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125023388] [2024-11-02 11:25:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125023388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:59,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212299790] [2024-11-02 11:25:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:59,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:59,817 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) [2024-11-02 11:25:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:59,904 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2024-11-02 11:25:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:59,905 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 [2024-11-02 11:25:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:59,906 INFO L225 Difference]: With dead ends: 80 [2024-11-02 11:25:59,906 INFO L226 Difference]: Without dead ends: 80 [2024-11-02 11:25:59,907 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 [2024-11-02 11:25:59,908 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:59,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-02 11:25:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-02 11:25:59,915 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) [2024-11-02 11:25:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-11-02 11:25:59,917 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 11 [2024-11-02 11:25:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:59,917 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-11-02 11:25:59,918 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) [2024-11-02 11:25:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-11-02 11:25:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 11:25:59,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,919 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:59,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:25:59,919 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)] === [2024-11-02 11:25:59,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149562, now seen corresponding path program 1 times [2024-11-02 11:25:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958140006] [2024-11-02 11:25:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:00,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958140006] [2024-11-02 11:26:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958140006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:00,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 11:26:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167864071] [2024-11-02 11:26:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:00,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 11:26:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 11:26:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:26:00,318 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) [2024-11-02 11:26:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:00,826 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2024-11-02 11:26:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 11:26:00,827 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 [2024-11-02 11:26:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:00,830 INFO L225 Difference]: With dead ends: 94 [2024-11-02 11:26:00,830 INFO L226 Difference]: Without dead ends: 94 [2024-11-02 11:26:00,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-02 11:26:00,833 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:00,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 222 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:26:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-02 11:26:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-11-02 11:26:00,853 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) [2024-11-02 11:26:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-11-02 11:26:00,855 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 18 [2024-11-02 11:26:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:00,856 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-11-02 11:26:00,856 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) [2024-11-02 11:26:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-11-02 11:26:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 11:26:00,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:00,860 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:00,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:26:00,860 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)] === [2024-11-02 11:26:00,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149563, now seen corresponding path program 1 times [2024-11-02 11:26:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:00,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881145512] [2024-11-02 11:26:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:00,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:01,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:01,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881145512] [2024-11-02 11:26:01,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881145512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:01,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:01,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-02 11:26:01,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568204450] [2024-11-02 11:26:01,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:01,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 11:26:01,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 11:26:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:26:01,410 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) [2024-11-02 11:26:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:01,993 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2024-11-02 11:26:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:26:01,994 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 [2024-11-02 11:26:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:01,995 INFO L225 Difference]: With dead ends: 102 [2024-11-02 11:26:01,995 INFO L226 Difference]: Without dead ends: 102 [2024-11-02 11:26:01,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-02 11:26:01,997 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-11-02 11:26:01,997 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] [2024-11-02 11:26:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-02 11:26:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-02 11:26:02,004 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) [2024-11-02 11:26:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2024-11-02 11:26:02,006 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 18 [2024-11-02 11:26:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:02,006 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2024-11-02 11:26:02,006 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) [2024-11-02 11:26:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2024-11-02 11:26:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 11:26:02,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:02,007 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:02,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:26:02,008 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)] === [2024-11-02 11:26:02,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403091, now seen corresponding path program 1 times [2024-11-02 11:26:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924748640] [2024-11-02 11:26:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:02,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924748640] [2024-11-02 11:26:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924748640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846338949] [2024-11-02 11:26:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:02,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:02,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:26:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:02,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-02 11:26:02,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:02,461 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 [2024-11-02 11:26:02,520 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 [2024-11-02 11:26:02,572 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-02 11:26:02,573 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 12 treesize of output 14 [2024-11-02 11:26:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-02 11:26:02,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846338949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:02,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563998394] [2024-11-02 11:26:02,950 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 11:26:02,951 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:02,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:02,964 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:02,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:03,187 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 50 for LOIs [2024-11-02 11:26:03,806 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 92 for LOIs [2024-11-02 11:26:04,010 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-02 11:26:04,037 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:09,775 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 [2024-11-02 11:26:09,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:09,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:09,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2024-11-02 11:26:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432482023] [2024-11-02 11:26:09,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:09,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 11:26:09,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 11:26:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=567, Unknown=2, NotChecked=48, Total=702 [2024-11-02 11:26:09,786 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) [2024-11-02 11:26:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:10,362 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2024-11-02 11:26:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:26:10,364 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 [2024-11-02 11:26:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:10,365 INFO L225 Difference]: With dead ends: 99 [2024-11-02 11:26:10,365 INFO L226 Difference]: Without dead ends: 99 [2024-11-02 11:26:10,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=113, Invalid=819, Unknown=2, NotChecked=58, Total=992 [2024-11-02 11:26:10,366 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:10,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 282 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 375 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2024-11-02 11:26:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-02 11:26:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-02 11:26:10,373 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) [2024-11-02 11:26:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2024-11-02 11:26:10,374 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 20 [2024-11-02 11:26:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:10,374 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2024-11-02 11:26:10,375 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) [2024-11-02 11:26:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2024-11-02 11:26:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 11:26:10,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:10,376 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:10,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:26:10,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 11:26:10,577 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)] === [2024-11-02 11:26:10,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403090, now seen corresponding path program 1 times [2024-11-02 11:26:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:10,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477034362] [2024-11-02 11:26:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:10,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477034362] [2024-11-02 11:26:10,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477034362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792421391] [2024-11-02 11:26:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:10,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:10,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:10,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:10,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:26:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:11,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-02 11:26:11,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:11,030 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 [2024-11-02 11:26:11,110 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 [2024-11-02 11:26:11,129 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-02 11:26:11,129 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 [2024-11-02 11:26:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-02 11:26:11,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792421391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919287181] [2024-11-02 11:26:11,347 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 11:26:11,347 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:11,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:11,348 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:11,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:11,527 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 54 for LOIs [2024-11-02 11:26:11,866 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 92 for LOIs [2024-11-02 11:26:11,938 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-02 11:26:11,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:15,861 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 [2024-11-02 11:26:15,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:15,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:26:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2024-11-02 11:26:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808456543] [2024-11-02 11:26:15,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:15,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 11:26:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 11:26:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=830, Unknown=1, NotChecked=58, Total=992 [2024-11-02 11:26:15,865 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) [2024-11-02 11:26:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:16,483 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2024-11-02 11:26:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:26:16,484 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 [2024-11-02 11:26:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:16,485 INFO L225 Difference]: With dead ends: 100 [2024-11-02 11:26:16,485 INFO L226 Difference]: Without dead ends: 100 [2024-11-02 11:26:16,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=127, Invalid=1066, Unknown=1, NotChecked=66, Total=1260 [2024-11-02 11:26:16,489 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-02 11:26:16,489 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] [2024-11-02 11:26:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-02 11:26:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-02 11:26:16,504 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) [2024-11-02 11:26:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2024-11-02 11:26:16,506 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 20 [2024-11-02 11:26:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:16,506 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2024-11-02 11:26:16,506 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) [2024-11-02 11:26:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2024-11-02 11:26:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 11:26:16,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:16,507 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] [2024-11-02 11:26:16,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:26:16,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-02 11:26:16,708 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)] === [2024-11-02 11:26:16,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash -222925609, now seen corresponding path program 1 times [2024-11-02 11:26:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:16,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612197053] [2024-11-02 11:26:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:16,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:16,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612197053] [2024-11-02 11:26:16,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612197053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:16,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929262456] [2024-11-02 11:26:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:16,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:26:16,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:26:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:26:16,810 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) [2024-11-02 11:26:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:16,978 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2024-11-02 11:26:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:26:16,979 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 [2024-11-02 11:26:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:16,981 INFO L225 Difference]: With dead ends: 115 [2024-11-02 11:26:16,981 INFO L226 Difference]: Without dead ends: 115 [2024-11-02 11:26:16,981 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 [2024-11-02 11:26:16,982 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 [2024-11-02 11:26:16,984 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] [2024-11-02 11:26:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-02 11:26:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2024-11-02 11:26:16,992 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) [2024-11-02 11:26:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2024-11-02 11:26:16,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 23 [2024-11-02 11:26:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:16,994 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2024-11-02 11:26:16,995 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) [2024-11-02 11:26:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2024-11-02 11:26:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 11:26:16,996 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:16,996 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] [2024-11-02 11:26:16,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 11:26:16,996 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)] === [2024-11-02 11:26:16,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -222925608, now seen corresponding path program 1 times [2024-11-02 11:26:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399380623] [2024-11-02 11:26:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:17,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:17,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399380623] [2024-11-02 11:26:17,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399380623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:17,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:17,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 11:26:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492717057] [2024-11-02 11:26:17,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:17,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:26:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:26:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:26:17,190 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) [2024-11-02 11:26:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:17,422 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2024-11-02 11:26:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 11:26:17,422 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 [2024-11-02 11:26:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:17,424 INFO L225 Difference]: With dead ends: 120 [2024-11-02 11:26:17,424 INFO L226 Difference]: Without dead ends: 120 [2024-11-02 11:26:17,424 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 [2024-11-02 11:26:17,425 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 [2024-11-02 11:26:17,426 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] [2024-11-02 11:26:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-02 11:26:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-02 11:26:17,438 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) [2024-11-02 11:26:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 156 transitions. [2024-11-02 11:26:17,442 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 156 transitions. Word has length 23 [2024-11-02 11:26:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:17,442 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 156 transitions. [2024-11-02 11:26:17,443 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) [2024-11-02 11:26:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 156 transitions. [2024-11-02 11:26:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:26:17,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:17,444 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:17,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 11:26:17,444 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)] === [2024-11-02 11:26:17,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1679385118, now seen corresponding path program 1 times [2024-11-02 11:26:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:17,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097249303] [2024-11-02 11:26:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:17,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097249303] [2024-11-02 11:26:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097249303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 11:26:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278527184] [2024-11-02 11:26:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:17,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 11:26:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 11:26:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 11:26:17,538 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) [2024-11-02 11:26:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:17,678 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2024-11-02 11:26:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:26:17,679 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 [2024-11-02 11:26:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:17,680 INFO L225 Difference]: With dead ends: 123 [2024-11-02 11:26:17,680 INFO L226 Difference]: Without dead ends: 123 [2024-11-02 11:26:17,681 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 [2024-11-02 11:26:17,681 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 [2024-11-02 11:26:17,682 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] [2024-11-02 11:26:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-02 11:26:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-02 11:26:17,688 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) [2024-11-02 11:26:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2024-11-02 11:26:17,690 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 24 [2024-11-02 11:26:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:17,690 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2024-11-02 11:26:17,691 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) [2024-11-02 11:26:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2024-11-02 11:26:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 11:26:17,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:17,692 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] [2024-11-02 11:26:17,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 11:26:17,693 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:26:17,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -126915569, now seen corresponding path program 1 times [2024-11-02 11:26:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:17,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710902219] [2024-11-02 11:26:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:17,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 11:26:18,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:18,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710902219] [2024-11-02 11:26:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710902219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241184014] [2024-11-02 11:26:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:18,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:18,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d80fce23-65c8-4050-843d-abc78487b3ee/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:26:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:18,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 11:26:18,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:18,414 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 [2024-11-02 11:26:18,438 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 [2024-11-02 11:26:18,477 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 [2024-11-02 11:26:18,801 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2024-11-02 11:26:18,802 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 [2024-11-02 11:26:19,303 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-02 11:26:19,303 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 [2024-11-02 11:26:19,341 INFO L349 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2024-11-02 11:26:19,341 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 [2024-11-02 11:26:19,414 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2024-11-02 11:26:19,414 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 [2024-11-02 11:26:19,681 INFO L349 Elim1Store]: treesize reduction 182, result has 30.5 percent of original size [2024-11-02 11:26:19,682 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 [2024-11-02 11:26:20,443 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:26:20,447 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-02 11:26:20,447 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 [2024-11-02 11:26:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-02 11:26:20,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241184014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472423452] [2024-11-02 11:26:21,121 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-02 11:26:21,121 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:21,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:21,122 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:21,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:22,080 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 54 for LOIs [2024-11-02 11:26:23,126 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 53 for LOIs [2024-11-02 11:26:23,194 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-02 11:26:23,214 INFO L180 IcfgInterpreter]: Interpretation finished