./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje --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 6fdb5189ea0a06d32886b44c2108d225ef2901fa5113fdc3856a252d0f653190 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:04:19,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:04:19,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 05:04:19,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:04:19,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:04:19,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:04:19,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:04:19,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:04:19,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:04:19,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:04:19,311 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:04:19,311 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:04:19,312 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:04:19,312 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:04:19,313 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:04:19,313 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:04:19,314 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:04:19,314 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:04:19,314 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:04:19,315 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:04:19,315 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:04:19,320 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:04:19,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 05:04:19,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 05:04:19,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:04:19,322 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:04:19,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:04:19,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:04:19,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:04:19,323 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 05:04:19,327 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 05:04:19,327 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 05:04:19,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:04:19,328 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:04:19,328 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:04:19,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 05:04:19,329 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:04:19,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:04:19,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:04:19,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:04:19,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:04:19,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:04:19,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:04:19,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:04:19,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:04:19,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:04:19,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:04:19,335 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:04:19,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:04:19,335 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_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fdb5189ea0a06d32886b44c2108d225ef2901fa5113fdc3856a252d0f653190 [2024-11-09 05:04:19,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:04:19,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:04:19,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:04:19,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:04:19,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:04:19,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c Unable to find full path for "g++" [2024-11-09 05:04:22,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:04:22,277 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:04:22,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2024-11-09 05:04:22,288 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/data/d3e1f73b8/d35954b1de4b48d989d6ab6ee1f2dade/FLAG09518c7c9 [2024-11-09 05:04:22,622 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/data/d3e1f73b8/d35954b1de4b48d989d6ab6ee1f2dade [2024-11-09 05:04:22,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:04:22,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:04:22,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:04:22,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:04:22,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:04:22,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:04:22" (1/1) ... [2024-11-09 05:04:22,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab7093a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:22, skipping insertion in model container [2024-11-09 05:04:22,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:04:22" (1/1) ... [2024-11-09 05:04:22,670 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:04:23,016 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 05:04:23,037 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 05:04:23,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:04:23,065 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:04:23,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:04:23,152 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:04:23,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23 WrapperNode [2024-11-09 05:04:23,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:04:23,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:04:23,154 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:04:23,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:04:23,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,230 INFO L138 Inliner]: procedures = 27, calls = 60, calls flagged for inlining = 19, calls inlined = 27, statements flattened = 355 [2024-11-09 05:04:23,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:04:23,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:04:23,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:04:23,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:04:23,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:04:23,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:04:23,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:04:23,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:04:23,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (1/1) ... [2024-11-09 05:04:23,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:04:23,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:23,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:04:23,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:04:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:04:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 05:04:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:04:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:04:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 05:04:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 05:04:23,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 05:04:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 05:04:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 05:04:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 05:04:23,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 05:04:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:04:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 05:04:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 05:04:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 05:04:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:04:23,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:04:23,464 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 05:04:23,689 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:04:23,693 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:04:24,801 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 05:04:24,801 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:04:25,593 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:04:25,594 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:04:25,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:04:25 BoogieIcfgContainer [2024-11-09 05:04:25,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:04:25,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:04:25,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:04:25,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:04:25,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:04:22" (1/3) ... [2024-11-09 05:04:25,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f404368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:04:25, skipping insertion in model container [2024-11-09 05:04:25,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:04:23" (2/3) ... [2024-11-09 05:04:25,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f404368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:04:25, skipping insertion in model container [2024-11-09 05:04:25,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:04:25" (3/3) ... [2024-11-09 05:04:25,609 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2024-11-09 05:04:25,632 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:04:25,633 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2024-11-09 05:04:25,633 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 05:04:25,836 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 05:04:25,880 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 148 places, 161 transitions, 343 flow [2024-11-09 05:04:29,841 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 75271 states, 70349 states have (on average 4.10150819485707) internal successors, (288537), 75270 states have internal predecessors, (288537), 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) [2024-11-09 05:04:29,882 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:04:29,888 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;@1b741961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:04:29,889 INFO L334 AbstractCegarLoop]: Starting to check reachability of 109 error locations. [2024-11-09 05:04:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 75271 states, 70349 states have (on average 4.10150819485707) internal successors, (288537), 75270 states have internal predecessors, (288537), 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) [2024-11-09 05:04:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 05:04:29,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:29,986 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 05:04:29,986 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:04:29,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 36582994, now seen corresponding path program 1 times [2024-11-09 05:04:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:30,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377140231] [2024-11-09 05:04:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:30,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:30,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:30,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377140231] [2024-11-09 05:04:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377140231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:30,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:30,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 05:04:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797386428] [2024-11-09 05:04:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:30,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:04:30,610 INFO L87 Difference]: Start difference. First operand has 75271 states, 70349 states have (on average 4.10150819485707) internal successors, (288537), 75270 states have internal predecessors, (288537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:33,020 INFO L93 Difference]: Finished difference Result 75271 states and 288537 transitions. [2024-11-09 05:04:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 05:04:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:34,052 INFO L225 Difference]: With dead ends: 75271 [2024-11-09 05:04:34,052 INFO L226 Difference]: Without dead ends: 75266 [2024-11-09 05:04:34,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:04:34,109 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:34,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:04:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75266 states. [2024-11-09 05:04:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75266 to 75266. [2024-11-09 05:04:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75266 states, 70348 states have (on average 4.101495422755445) internal successors, (288532), 75265 states have internal predecessors, (288532), 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) [2024-11-09 05:04:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75266 states to 75266 states and 288532 transitions. [2024-11-09 05:04:39,561 INFO L78 Accepts]: Start accepts. Automaton has 75266 states and 288532 transitions. Word has length 4 [2024-11-09 05:04:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:39,562 INFO L471 AbstractCegarLoop]: Abstraction has 75266 states and 288532 transitions. [2024-11-09 05:04:39,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 75266 states and 288532 transitions. [2024-11-09 05:04:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 05:04:39,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:39,564 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 05:04:39,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:04:39,565 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:04:39,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash 36582995, now seen corresponding path program 1 times [2024-11-09 05:04:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302610456] [2024-11-09 05:04:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:40,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302610456] [2024-11-09 05:04:40,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302610456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:40,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:40,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:04:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904749084] [2024-11-09 05:04:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:40,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:04:40,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:04:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:04:40,240 INFO L87 Difference]: Start difference. First operand 75266 states and 288532 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:44,069 INFO L93 Difference]: Finished difference Result 150532 states and 577064 transitions. [2024-11-09 05:04:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:04:44,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 05:04:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:45,096 INFO L225 Difference]: With dead ends: 150532 [2024-11-09 05:04:45,096 INFO L226 Difference]: Without dead ends: 75270 [2024-11-09 05:04:45,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:04:45,285 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:45,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 182 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75270 states. [2024-11-09 05:04:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75270 to 75269. [2024-11-09 05:04:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75269 states, 70351 states have (on average 4.1013773791417325) internal successors, (288536), 75268 states have internal predecessors, (288536), 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) [2024-11-09 05:04:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75269 states to 75269 states and 288536 transitions. [2024-11-09 05:04:49,613 INFO L78 Accepts]: Start accepts. Automaton has 75269 states and 288536 transitions. Word has length 4 [2024-11-09 05:04:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:49,614 INFO L471 AbstractCegarLoop]: Abstraction has 75269 states and 288536 transitions. [2024-11-09 05:04:49,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 75269 states and 288536 transitions. [2024-11-09 05:04:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:04:49,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:49,615 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:04:49,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:04:49,616 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:04:49,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 798308117, now seen corresponding path program 1 times [2024-11-09 05:04:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:49,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306273592] [2024-11-09 05:04:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:49,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:49,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:49,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306273592] [2024-11-09 05:04:49,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306273592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:49,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:49,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:04:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815946611] [2024-11-09 05:04:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:49,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:04:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:04:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:04:49,768 INFO L87 Difference]: Start difference. First operand 75269 states and 288536 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-09 05:04:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:52,343 INFO L93 Difference]: Finished difference Result 150547 states and 577085 transitions. [2024-11-09 05:04:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:04:52,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:04:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:54,232 INFO L225 Difference]: With dead ends: 150547 [2024-11-09 05:04:54,232 INFO L226 Difference]: Without dead ends: 75286 [2024-11-09 05:04:54,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:54,372 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 27 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:54,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 263 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:04:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75286 states. [2024-11-09 05:04:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75286 to 75281. [2024-11-09 05:04:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75281 states, 70363 states have (on average 4.100947941389651) internal successors, (288555), 75280 states have internal predecessors, (288555), 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) [2024-11-09 05:04:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75281 states to 75281 states and 288555 transitions. [2024-11-09 05:04:58,736 INFO L78 Accepts]: Start accepts. Automaton has 75281 states and 288555 transitions. Word has length 6 [2024-11-09 05:04:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:58,736 INFO L471 AbstractCegarLoop]: Abstraction has 75281 states and 288555 transitions. [2024-11-09 05:04:58,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-11-09 05:04:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 75281 states and 288555 transitions. [2024-11-09 05:04:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:04:58,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:58,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 05:04:58,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:04:58,738 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:04:58,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1076527643, now seen corresponding path program 1 times [2024-11-09 05:04:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638273732] [2024-11-09 05:04:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:58,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:59,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638273732] [2024-11-09 05:04:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638273732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:59,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111762157] [2024-11-09 05:04:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:59,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:59,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:59,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:04:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:59,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:04:59,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:59,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 05:05:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:00,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:00,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111762157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:05:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582519568] [2024-11-09 05:05:00,309 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:259) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 05:05:00,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:05:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 05:05:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431522721] [2024-11-09 05:05:00,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:05:00,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:05:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:05:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:05:00,316 INFO L87 Difference]: Start difference. First operand 75281 states and 288555 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:04,257 INFO L93 Difference]: Finished difference Result 150552 states and 577097 transitions. [2024-11-09 05:05:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:05:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:05:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:05,274 INFO L225 Difference]: With dead ends: 150552 [2024-11-09 05:05:05,274 INFO L226 Difference]: Without dead ends: 75280 [2024-11-09 05:05:05,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:05:05,538 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:05,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 498 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:05:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75280 states. [2024-11-09 05:05:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75280 to 75278. [2024-11-09 05:05:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75278 states, 70361 states have (on average 4.10100766049374) internal successors, (288551), 75277 states have internal predecessors, (288551), 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) [2024-11-09 05:05:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75278 states to 75278 states and 288551 transitions. [2024-11-09 05:05:09,651 INFO L78 Accepts]: Start accepts. Automaton has 75278 states and 288551 transitions. Word has length 7 [2024-11-09 05:05:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:09,651 INFO L471 AbstractCegarLoop]: Abstraction has 75278 states and 288551 transitions. [2024-11-09 05:05:09,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 75278 states and 288551 transitions. [2024-11-09 05:05:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:05:09,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:09,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:05:09,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:05:09,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:09,853 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:05:09,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 545841703, now seen corresponding path program 1 times [2024-11-09 05:05:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995099808] [2024-11-09 05:05:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:10,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:05:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995099808] [2024-11-09 05:05:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995099808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624509811] [2024-11-09 05:05:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:10,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:05:10,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:05:10,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:05:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:10,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:05:10,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:10,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 05:05:10,555 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 05:05:10,556 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 32 treesize of output 27 [2024-11-09 05:05:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:10,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:10,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624509811] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:10,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:05:10,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-09 05:05:10,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654860832] [2024-11-09 05:05:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:05:10,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:05:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:10,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:05:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:05:10,768 INFO L87 Difference]: Start difference. First operand 75278 states and 288551 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 05:05:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:13,037 INFO L93 Difference]: Finished difference Result 75293 states and 288568 transitions. [2024-11-09 05:05:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:05:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2024-11-09 05:05:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:13,898 INFO L225 Difference]: With dead ends: 75293 [2024-11-09 05:05:13,898 INFO L226 Difference]: Without dead ends: 75292 [2024-11-09 05:05:13,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:05:13,929 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 303 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:13,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 121 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:05:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75292 states. [2024-11-09 05:05:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75292 to 75279. [2024-11-09 05:05:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75279 states, 70362 states have (on average 4.100963588300503) internal successors, (288552), 75278 states have internal predecessors, (288552), 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) [2024-11-09 05:05:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75279 states to 75279 states and 288552 transitions. [2024-11-09 05:05:18,365 INFO L78 Accepts]: Start accepts. Automaton has 75279 states and 288552 transitions. Word has length 9 [2024-11-09 05:05:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:18,366 INFO L471 AbstractCegarLoop]: Abstraction has 75279 states and 288552 transitions. [2024-11-09 05:05:18,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 05:05:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 75279 states and 288552 transitions. [2024-11-09 05:05:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:05:18,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:18,367 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:05:18,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:05:18,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a4f4e31-fa7a-48c7-89c6-fb4f72bba9ef/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:18,568 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2024-11-09 05:05:18,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1207581524, now seen corresponding path program 1 times [2024-11-09 05:05:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:18,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608831940] [2024-11-09 05:05:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:18,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:05:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608831940] [2024-11-09 05:05:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608831940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:05:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:05:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:05:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920850853] [2024-11-09 05:05:18,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:05:18,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:05:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:05:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:05:18,750 INFO L87 Difference]: Start difference. First operand 75279 states and 288552 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:19,541 INFO L93 Difference]: Finished difference Result 75279 states and 288552 transitions. [2024-11-09 05:05:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:05:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 05:05:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:21,179 INFO L225 Difference]: With dead ends: 75279 [2024-11-09 05:05:21,179 INFO L226 Difference]: Without dead ends: 68742 [2024-11-09 05:05:21,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:05:21,219 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:21,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 68 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:05:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68742 states.