./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67d3e2c6779f32015be5c9fe966e6a739e1c762dcde7f287ad383839eb490e84 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:53,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:20:53,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:20:53,270 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:20:53,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:20:53,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:20:53,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:20:53,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:20:53,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:20:53,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:20:53,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:20:53,305 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:20:53,305 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:20:53,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:20:53,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:20:53,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:20:53,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:20:53,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:20:53,310 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:20:53,311 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:20:53,312 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:20:53,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:20:53,319 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:20:53,320 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:20:53,321 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:20:53,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:20:53,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:20:53,323 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:20:53,323 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:20:53,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:53,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:20:53,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:20:53,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:20:53,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:20:53,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:20:53,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:20:53,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:20:53,328 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:20:53,328 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67d3e2c6779f32015be5c9fe966e6a739e1c762dcde7f287ad383839eb490e84 [2023-11-12 02:20:53,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:20:53,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:20:53,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:20:53,727 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:20:53,728 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:20:53,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i [2023-11-12 02:20:57,132 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:20:57,471 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:20:57,472 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i [2023-11-12 02:20:57,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/data/a76561b7e/c7923bb5ff65448ba6d0858de46bc942/FLAG784054322 [2023-11-12 02:20:57,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/data/a76561b7e/c7923bb5ff65448ba6d0858de46bc942 [2023-11-12 02:20:57,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:20:57,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:20:57,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:57,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:20:57,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:20:57,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:57" (1/1) ... [2023-11-12 02:20:57,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12923834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:57, skipping insertion in model container [2023-11-12 02:20:57,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:57" (1/1) ... [2023-11-12 02:20:57,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:20:58,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:58,168 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:20:58,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:58,362 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:58,362 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:58,371 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:20:58,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58 WrapperNode [2023-11-12 02:20:58,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:58,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:58,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:20:58,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:20:58,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,490 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-11-12 02:20:58,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:58,493 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:20:58,493 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:20:58,493 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:20:58,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:20:58,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:20:58,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:20:58,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:20:58,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (1/1) ... [2023-11-12 02:20:58,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:58,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:58,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b010ef4-739e-43d2-99f3-bd835d86e005/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:20:58,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:20:58,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:20:58,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:20:58,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:20:58,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:20:58,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:20:58,715 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-12 02:20:58,715 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-12 02:20:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-12 02:20:58,716 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-12 02:20:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-12 02:20:58,716 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-12 02:20:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:20:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:20:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:20:58,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:20:58,721 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:20:58,942 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:20:58,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:20:59,869 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:01,323 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:01,324 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:21:01,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:01 BoogieIcfgContainer [2023-11-12 02:21:01,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:01,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:01,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:01,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:01,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:20:57" (1/3) ... [2023-11-12 02:21:01,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196201fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:01, skipping insertion in model container [2023-11-12 02:21:01,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:58" (2/3) ... [2023-11-12 02:21:01,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196201fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:01, skipping insertion in model container [2023-11-12 02:21:01,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:01" (3/3) ... [2023-11-12 02:21:01,351 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2023-11-12 02:21:01,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:01,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2023-11-12 02:21:01,377 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:21:01,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:21:01,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 200 transitions, 412 flow [2023-11-12 02:21:01,817 INFO L124 PetriNetUnfolderBase]: 3/197 cut-off events. [2023-11-12 02:21:01,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:01,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 197 events. 3/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 391 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-11-12 02:21:01,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 200 transitions, 412 flow [2023-11-12 02:21:01,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 197 transitions, 403 flow [2023-11-12 02:21:01,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:01,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 197 transitions, 403 flow [2023-11-12 02:21:01,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 197 transitions, 403 flow [2023-11-12 02:21:01,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 197 transitions, 403 flow [2023-11-12 02:21:02,006 INFO L124 PetriNetUnfolderBase]: 3/197 cut-off events. [2023-11-12 02:21:02,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:02,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 197 events. 3/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 393 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-11-12 02:21:02,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 10428 [2023-11-12 02:21:38,881 INFO L134 LiptonReduction]: Checked pairs total: 49296 [2023-11-12 02:21:38,882 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-12 02:21:38,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:38,909 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5f98b919, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:38,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 109 error locations. [2023-11-12 02:21:38,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:38,912 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:21:38,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:38,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:38,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:21:38,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-12 02:21:38,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1396, now seen corresponding path program 1 times [2023-11-12 02:21:38,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:38,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653510989] [2023-11-12 02:21:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653510989] [2023-11-12 02:21:39,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653510989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:39,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:39,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:21:39,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486801210] [2023-11-12 02:21:39,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:21:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:21:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:39,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 373 [2023-11-12 02:21:39,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 95 transitions, 199 flow. Second operand has 2 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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) [2023-11-12 02:21:39,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:39,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 373 [2023-11-12 02:21:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:47,486 INFO L124 PetriNetUnfolderBase]: 17324/24361 cut-off events. [2023-11-12 02:21:47,486 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:21:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48718 conditions, 24361 events. 17324/24361 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2174. Compared 168712 event pairs, 17324 based on Foata normal form. 0/9946 useless extension candidates. Maximal degree in co-relation 48707. Up to 24261 conditions per place. [2023-11-12 02:21:47,740 INFO L140 encePairwiseOnDemand]: 330/373 looper letters, 44 selfloop transitions, 0 changer transitions 0/50 dead transitions. [2023-11-12 02:21:47,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 197 flow [2023-11-12 02:21:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:21:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:21:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 353 transitions. [2023-11-12 02:21:47,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47319034852546915 [2023-11-12 02:21:47,771 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 353 transitions. [2023-11-12 02:21:47,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 353 transitions. [2023-11-12 02:21:47,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:47,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 353 transitions. [2023-11-12 02:21:47,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 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) [2023-11-12 02:21:47,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 373.0) internal successors, (1119), 3 states have internal predecessors, (1119), 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) [2023-11-12 02:21:47,796 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 373.0) internal successors, (1119), 3 states have internal predecessors, (1119), 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) [2023-11-12 02:21:47,799 INFO L175 Difference]: Start difference. First operand has 103 places, 95 transitions, 199 flow. Second operand 2 states and 353 transitions. [2023-11-12 02:21:47,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 197 flow [2023-11-12 02:21:47,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:21:47,812 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 106 flow [2023-11-12 02:21:47,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-12 02:21:47,821 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -45 predicate places. [2023-11-12 02:21:47,822 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 106 flow [2023-11-12 02:21:47,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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) [2023-11-12 02:21:47,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:47,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:21:47,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:21:47,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-12 02:21:47,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1381650, now seen corresponding path program 1 times [2023-11-12 02:21:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244622952] [2023-11-12 02:21:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244622952] [2023-11-12 02:21:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244622952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:48,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:21:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088726506] [2023-11-12 02:21:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:48,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:48,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 373 [2023-11-12 02:21:48,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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) [2023-11-12 02:21:48,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:48,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 373 [2023-11-12 02:21:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand