./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/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_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/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 32bit --witnessprinter.graph.data.programhash 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:31,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:31,728 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:36:31,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:31,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:31,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:31,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:31,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:31,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:31,788 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:31,789 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:31,789 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:31,790 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:31,790 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:31,793 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:31,793 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:31,794 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:31,794 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:31,795 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:31,795 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:31,796 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:31,800 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:31,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:36:31,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:36:31,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:31,802 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:31,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:31,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:31,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:31,803 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:36:31,804 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:36:31,804 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:36:31,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:31,805 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:36:31,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:31,806 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:36:31,806 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:31,807 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:31,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:31,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:31,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:31,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:31,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:31,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:31,811 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:31,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:31,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:31,812 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:31,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:31,812 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_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2024-11-02 12:36:32,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:32,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:32,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:32,154 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:32,155 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:32,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/memsafety/test-0234-1.i Unable to find full path for "g++" [2024-11-02 12:36:34,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:34,521 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:34,522 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/sv-benchmarks/c/memsafety/test-0234-1.i [2024-11-02 12:36:34,548 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/data/d448f8fe0/ab0379a0a17545dcb6ee8e697c583b51/FLAG8fa3d23b2 [2024-11-02 12:36:34,575 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/data/d448f8fe0/ab0379a0a17545dcb6ee8e697c583b51 [2024-11-02 12:36:34,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:34,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:34,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:34,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:34,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:34,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:34" (1/1) ... [2024-11-02 12:36:34,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713930e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:34, skipping insertion in model container [2024-11-02 12:36:34,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:34" (1/1) ... [2024-11-02 12:36:34,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:35,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:35,240 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:35,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:35,371 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:35,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35 WrapperNode [2024-11-02 12:36:35,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:35,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:35,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:35,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:35,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,437 INFO L138 Inliner]: procedures = 188, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 213 [2024-11-02 12:36:35,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:35,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:35,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:35,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:35,450 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:35,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:35,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:35,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:35,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (1/1) ... [2024-11-02 12:36:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:35,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:36:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:36:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:36:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:36:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2024-11-02 12:36:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2024-11-02 12:36:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:36:35,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:36:35,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:36:35,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:35,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:35,734 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:35,736 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:36,418 INFO L? ?]: Removed 197 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:36,418 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:36,529 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:36,530 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-02 12:36:36,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:36 BoogieIcfgContainer [2024-11-02 12:36:36,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:36,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:36,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:36,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:36,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:34" (1/3) ... [2024-11-02 12:36:36,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4488adbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:36, skipping insertion in model container [2024-11-02 12:36:36,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:35" (2/3) ... [2024-11-02 12:36:36,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4488adbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:36, skipping insertion in model container [2024-11-02 12:36:36,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:36" (3/3) ... [2024-11-02 12:36:36,546 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2024-11-02 12:36:36,570 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:36,570 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2024-11-02 12:36:36,644 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:36,651 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;@1b383eeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:36,651 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-02 12:36:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 76 states have (on average 2.263157894736842) internal successors, (172), 151 states have internal predecessors, (172), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:36:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:36:36,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:36,666 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:36:36,667 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:36,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 369855, now seen corresponding path program 1 times [2024-11-02 12:36:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91486536] [2024-11-02 12:36:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:36,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91486536] [2024-11-02 12:36:36,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91486536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:36,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:36,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734176244] [2024-11-02 12:36:36,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:36,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:36:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:36:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:36:36,905 INFO L87 Difference]: Start difference. First operand has 159 states, 76 states have (on average 2.263157894736842) internal successors, (172), 151 states have internal predecessors, (172), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:37,011 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2024-11-02 12:36:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:36:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:36:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:37,025 INFO L225 Difference]: With dead ends: 159 [2024-11-02 12:36:37,025 INFO L226 Difference]: Without dead ends: 158 [2024-11-02 12:36:37,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:36:37,033 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:37,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-02 12:36:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-02 12:36:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 150 states have internal predecessors, (161), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:36:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2024-11-02 12:36:37,084 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 3 [2024-11-02 12:36:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:37,085 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2024-11-02 12:36:37,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2024-11-02 12:36:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:36:37,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:37,087 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:36:37,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:37,088 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:37,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 351429875, now seen corresponding path program 1 times [2024-11-02 12:36:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:37,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287845933] [2024-11-02 12:36:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:37,301 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 12:36:37,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287845933] [2024-11-02 12:36:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287845933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:37,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:37,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530992019] [2024-11-02 12:36:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:37,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:37,307 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:37,511 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2024-11-02 12:36:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:36:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:37,514 INFO L225 Difference]: With dead ends: 157 [2024-11-02 12:36:37,517 INFO L226 Difference]: Without dead ends: 157 [2024-11-02 12:36:37,518 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 12:36:37,519 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:37,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 243 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-02 12:36:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-02 12:36:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 149 states have internal predecessors, (160), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:36:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 172 transitions. [2024-11-02 12:36:37,545 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 172 transitions. Word has length 5 [2024-11-02 12:36:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:37,545 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 172 transitions. [2024-11-02 12:36:37,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 172 transitions. [2024-11-02 12:36:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:36:37,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:37,546 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:36:37,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:37,547 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:37,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1990575433, now seen corresponding path program 1 times [2024-11-02 12:36:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:37,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664870430] [2024-11-02 12:36:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:36:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224119431] [2024-11-02 12:36:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:37,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:37,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:37,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:37,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:36:37,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:37,893 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 12:36:37,932 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 12:36:37,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:36:37,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664870430] [2024-11-02 12:36:37,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:36:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224119431] [2024-11-02 12:36:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224119431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:37,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:37,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335238988] [2024-11-02 12:36:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:37,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:37,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:37,939 INFO L87 Difference]: Start difference. First operand 157 states and 172 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 12:36:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:38,239 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2024-11-02 12:36:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-02 12:36:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:38,242 INFO L225 Difference]: With dead ends: 162 [2024-11-02 12:36:38,245 INFO L226 Difference]: Without dead ends: 162 [2024-11-02 12:36:38,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:38,246 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 7 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:38,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:36:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-02 12:36:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2024-11-02 12:36:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 80 states have (on average 2.0625) internal successors, (165), 153 states have internal predecessors, (165), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:36:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2024-11-02 12:36:38,268 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 6 [2024-11-02 12:36:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:38,268 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2024-11-02 12:36:38,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 12:36:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2024-11-02 12:36:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:36:38,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:38,272 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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 12:36:38,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:36:38,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:38,473 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:38,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -996929926, now seen corresponding path program 1 times [2024-11-02 12:36:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102602209] [2024-11-02 12:36:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:36:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888496056] [2024-11-02 12:36:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:38,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:36:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:38,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-02 12:36:38,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 12:36:38,962 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:36:38,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102602209] [2024-11-02 12:36:38,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:36:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888496056] [2024-11-02 12:36:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888496056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:36:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551493602] [2024-11-02 12:36:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:38,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:36:38,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:36:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:38,969 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:36:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:39,101 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2024-11-02 12:36:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:36:39,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-02 12:36:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:39,104 INFO L225 Difference]: With dead ends: 166 [2024-11-02 12:36:39,104 INFO L226 Difference]: Without dead ends: 164 [2024-11-02 12:36:39,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:39,108 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 2 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:39,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 424 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-02 12:36:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-02 12:36:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 155 states have internal predecessors, (167), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 12:36:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2024-11-02 12:36:39,123 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 45 [2024-11-02 12:36:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:39,123 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2024-11-02 12:36:39,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:36:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2024-11-02 12:36:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:36:39,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:39,130 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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 12:36:39,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:36:39,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:39,331 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:39,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash -740945522, now seen corresponding path program 1 times [2024-11-02 12:36:39,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:39,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404272502] [2024-11-02 12:36:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:39,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:36:39,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522518593] [2024-11-02 12:36:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:39,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:39,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:36:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:40,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-02 12:36:40,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:40,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-02 12:36:40,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:36:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-02 12:36:40,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-02 12:36:40,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404272502] [2024-11-02 12:36:40,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:36:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522518593] [2024-11-02 12:36:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522518593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:40,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906483869] [2024-11-02 12:36:40,650 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-02 12:36:40,651 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:40,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:40,661 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:40,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:43,782 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2024-11-02 12:36:44,049 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1906483869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:49,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:36:49,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6] total 31 [2024-11-02 12:36:49,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301581709] [2024-11-02 12:36:49,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:49,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-02 12:36:49,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-02 12:36:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-11-02 12:36:49,924 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 12:36:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:53,055 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2024-11-02 12:36:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 12:36:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2024-11-02 12:36:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:53,057 INFO L225 Difference]: With dead ends: 238 [2024-11-02 12:36:53,057 INFO L226 Difference]: Without dead ends: 238 [2024-11-02 12:36:53,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2024-11-02 12:36:53,059 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 151 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:53,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 735 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-02 12:36:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-02 12:36:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 209. [2024-11-02 12:36:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 119 states have (on average 1.9831932773109244) internal successors, (236), 192 states have internal predecessors, (236), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-02 12:36:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 260 transitions. [2024-11-02 12:36:53,083 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 260 transitions. Word has length 50 [2024-11-02 12:36:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:53,084 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 260 transitions. [2024-11-02 12:36:53,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 12:36:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 260 transitions. [2024-11-02 12:36:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:36:53,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:53,085 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 12:36:53,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:53,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:53,289 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:53,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -254520829, now seen corresponding path program 1 times [2024-11-02 12:36:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846579864] [2024-11-02 12:36:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-02 12:36:54,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846579864] [2024-11-02 12:36:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846579864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180079141] [2024-11-02 12:36:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:54,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:54,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:54,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:36:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:54,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:36:54,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:54,435 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2024-11-02 12:36:54,461 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-02 12:36:54,461 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 12:36:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 6 not checked. [2024-11-02 12:36:54,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:54,668 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-02 12:36:54,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-11-02 12:36:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-02 12:36:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180079141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255393781] [2024-11-02 12:36:54,694 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:36:54,694 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:54,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:54,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:54,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:55,712 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2024-11-02 12:36:55,950 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:58,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2716#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (exists ((|v_ULTIMATE.start_l4_insert_~item~0#1.base_23| Int)) (not (= (select |#valid| |v_ULTIMATE.start_l4_insert_~item~0#1.base_23|) 1))) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_66| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#value#1_65| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#res#1.offset_57| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr34#1_88| Int)) (and (= |v_zalloc_or_die_#Ultimate.C_memset_#value#1_65| 0) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_66| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr34#1_88| 4294967296)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr34#1_88|) (= 0 |v_zalloc_or_die_#Ultimate.C_memset_#res#1.offset_57|))) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)))' at error location [2024-11-02 12:36:58,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:36:58,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:36:58,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2024-11-02 12:36:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609905117] [2024-11-02 12:36:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:58,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:36:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:36:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=777, Unknown=1, NotChecked=56, Total=930 [2024-11-02 12:36:58,016 INFO L87 Difference]: Start difference. First operand 209 states and 260 transitions. Second operand has 14 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:36:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:58,509 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2024-11-02 12:36:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2024-11-02 12:36:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:58,511 INFO L225 Difference]: With dead ends: 207 [2024-11-02 12:36:58,511 INFO L226 Difference]: Without dead ends: 207 [2024-11-02 12:36:58,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=119, Invalid=940, Unknown=1, NotChecked=62, Total=1122 [2024-11-02 12:36:58,512 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 17 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:58,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 701 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 470 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2024-11-02 12:36:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-02 12:36:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-11-02 12:36:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 119 states have (on average 1.949579831932773) internal successors, (232), 190 states have internal predecessors, (232), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-02 12:36:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2024-11-02 12:36:58,522 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 54 [2024-11-02 12:36:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:58,523 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2024-11-02 12:36:58,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:36:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2024-11-02 12:36:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:36:58,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:58,524 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 12:36:58,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:36:58,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:58,726 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-02 12:36:58,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -254520828, now seen corresponding path program 1 times [2024-11-02 12:36:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:58,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177783788] [2024-11-02 12:36:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:58,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:36:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096418225] [2024-11-02 12:36:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:59,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:59,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a18c672-4213-46eb-a19c-fa6b6eec3d4e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:36:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:59,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-02 12:36:59,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:59,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-02 12:36:59,477 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2024-11-02 12:36:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:36:59,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-02 12:36:59,515 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:36:59,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-02 12:36:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 7 not checked. [2024-11-02 12:36:59,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:59,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177783788] [2024-11-02 12:36:59,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:36:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096418225] [2024-11-02 12:36:59,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096418225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158916801] [2024-11-02 12:36:59,650 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:36:59,651 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:59,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:59,651 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:59,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:01,756 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2024-11-02 12:37:01,967 INFO L180 IcfgInterpreter]: Interpretation finished