./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU --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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:06:34,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:06:34,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:06:34,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:06:34,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:06:34,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:06:34,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:06:34,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:06:34,466 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:06:34,467 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:06:34,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:06:34,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:06:34,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:06:34,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:06:34,470 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:06:34,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:06:34,470 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:06:34,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:06:34,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:06:34,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:06:34,479 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:06:34,479 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:06:34,480 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:06:34,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:06:34,480 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:06:34,480 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:06:34,481 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:06:34,481 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:06:34,481 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:06:34,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:06:34,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:06:34,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:06:34,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:06:34,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:34,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:06:34,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:06:34,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:06:34,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:06:34,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:06:34,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:06:34,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:06:34,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:06:34,487 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_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-10-31 22:06:34,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:06:34,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:06:34,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:06:34,819 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:06:34,819 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:06:34,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c Unable to find full path for "g++" [2024-10-31 22:06:36,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:06:37,105 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:06:37,106 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-31 22:06:37,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/data/abe8db2dd/a574cfcef75644a89721a2fe41717a53/FLAG4fc746934 [2024-10-31 22:06:37,460 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/data/abe8db2dd/a574cfcef75644a89721a2fe41717a53 [2024-10-31 22:06:37,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:06:37,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:06:37,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:37,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:06:37,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:06:37,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a82e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37, skipping insertion in model container [2024-10-31 22:06:37,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,513 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:06:37,794 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:06:37,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:37,814 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:06:37,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:37,870 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:06:37,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37 WrapperNode [2024-10-31 22:06:37,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:37,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:37,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:06:37,872 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:06:37,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,940 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-10-31 22:06:37,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:37,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:06:37,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:06:37,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:06:37,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,989 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-31 22:06:37,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:37,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:06:38,043 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:06:38,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:06:38,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:06:38,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (1/1) ... [2024-10-31 22:06:38,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:38,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:06:38,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:06:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:06:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:06:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:06:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:06:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:06:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:06:38,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:06:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:06:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:06:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:06:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:06:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:06:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:06:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:06:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:06:38,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:06:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:06:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:06:38,133 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:06:38,251 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:06:38,255 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:06:38,916 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:06:38,917 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:06:39,489 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:06:39,489 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:06:39,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:39 BoogieIcfgContainer [2024-10-31 22:06:39,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:06:39,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:06:39,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:06:39,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:06:39,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:06:37" (1/3) ... [2024-10-31 22:06:39,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2687f2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:39, skipping insertion in model container [2024-10-31 22:06:39,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:37" (2/3) ... [2024-10-31 22:06:39,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2687f2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:39, skipping insertion in model container [2024-10-31 22:06:39,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:39" (3/3) ... [2024-10-31 22:06:39,504 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-10-31 22:06:39,523 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:06:39,523 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-10-31 22:06:39,524 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:06:39,612 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:06:39,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-10-31 22:06:39,715 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-10-31 22:06:39,716 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:06:39,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-10-31 22:06:39,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-10-31 22:06:39,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-10-31 22:06:39,744 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:06:39,754 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=PETRI_NET, 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;@74836f95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:06:39,757 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-10-31 22:06:39,761 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:06:39,761 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:06:39,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:06:39,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:39,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:39,763 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:39,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1034912, now seen corresponding path program 1 times [2024-10-31 22:06:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888919856] [2024-10-31 22:06:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:40,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888919856] [2024-10-31 22:06:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888919856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:40,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:40,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:06:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035871643] [2024-10-31 22:06:40,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:40,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:40,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-31 22:06:40,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-31 22:06:40,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:40,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-31 22:06:40,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:43,436 INFO L124 PetriNetUnfolderBase]: 11258/15925 cut-off events. [2024-10-31 22:06:43,437 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2024-10-31 22:06:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32375 conditions, 15925 events. 11258/15925 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 90309 event pairs, 10184 based on Foata normal form. 1/9499 useless extension candidates. Maximal degree in co-relation 31435. Up to 15894 conditions per place. [2024-10-31 22:06:43,561 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-31 22:06:43,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-10-31 22:06:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-31 22:06:43,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-10-31 22:06:43,577 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-10-31 22:06:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-10-31 22:06:43,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:06:43,597 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-10-31 22:06:43,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-10-31 22:06:43,606 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-10-31 22:06:43,607 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-10-31 22:06:43,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-31 22:06:43,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:43,607 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:43,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:06:43,608 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:43,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1034913, now seen corresponding path program 1 times [2024-10-31 22:06:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:43,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584308692] [2024-10-31 22:06:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:43,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:43,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584308692] [2024-10-31 22:06:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584308692] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:43,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:43,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:43,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824793635] [2024-10-31 22:06:43,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:43,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:43,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:43,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:44,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-31 22:06:44,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-31 22:06:44,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:44,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-31 22:06:44,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:46,482 INFO L124 PetriNetUnfolderBase]: 11261/15934 cut-off events. [2024-10-31 22:06:46,482 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-10-31 22:06:46,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32059 conditions, 15934 events. 11261/15934 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90442 event pairs, 10184 based on Foata normal form. 0/9503 useless extension candidates. Maximal degree in co-relation 32009. Up to 15907 conditions per place. [2024-10-31 22:06:46,577 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-31 22:06:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-10-31 22:06:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:06:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:06:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-10-31 22:06:46,580 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-31 22:06:46,580 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-10-31 22:06:46,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-10-31 22:06:46,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:46,586 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-10-31 22:06:46,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-10-31 22:06:46,588 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-10-31 22:06:46,589 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-10-31 22:06:46,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-31 22:06:46,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:46,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:06:46,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:06:46,592 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:46,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 994583983, now seen corresponding path program 1 times [2024-10-31 22:06:46,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:46,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286662425] [2024-10-31 22:06:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:47,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286662425] [2024-10-31 22:06:47,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286662425] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:47,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935881410] [2024-10-31 22:06:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:47,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:47,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:47,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:06:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:47,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:06:47,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:47,257 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 [2024-10-31 22:06:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:47,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935881410] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:06:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104043007] [2024-10-31 22:06:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:47,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:06:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:06:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:06:47,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-31 22:06:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2024-10-31 22:06:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-31 22:06:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:50,923 INFO L124 PetriNetUnfolderBase]: 11264/15940 cut-off events. [2024-10-31 22:06:50,923 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-10-31 22:06:50,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32110 conditions, 15940 events. 11264/15940 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90556 event pairs, 10184 based on Foata normal form. 0/9514 useless extension candidates. Maximal degree in co-relation 32023. Up to 15896 conditions per place. [2024-10-31 22:06:51,022 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 48 selfloop transitions, 26 changer transitions 0/78 dead transitions. [2024-10-31 22:06:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 390 flow [2024-10-31 22:06:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:06:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:06:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-10-31 22:06:51,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-10-31 22:06:51,027 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 8 states and 168 transitions. [2024-10-31 22:06:51,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 390 flow [2024-10-31 22:06:51,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:06:51,031 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 294 flow [2024-10-31 22:06:51,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-10-31 22:06:51,032 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-10-31 22:06:51,032 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 294 flow [2024-10-31 22:06:51,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2024-10-31 22:06:51,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:51,034 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:51,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:06:51,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:51,235 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:51,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1537323912, now seen corresponding path program 1 times [2024-10-31 22:06:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624319822] [2024-10-31 22:06:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:51,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624319822] [2024-10-31 22:06:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624319822] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:51,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:06:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281865828] [2024-10-31 22:06:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:51,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:51,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:51,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-31 22:06:51,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-31 22:06:51,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:51,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-31 22:06:51,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:53,469 INFO L124 PetriNetUnfolderBase]: 13086/18562 cut-off events. [2024-10-31 22:06:53,469 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-31 22:06:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37407 conditions, 18562 events. 13086/18562 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 107601 event pairs, 4436 based on Foata normal form. 162/11415 useless extension candidates. Maximal degree in co-relation 37295. Up to 15883 conditions per place. [2024-10-31 22:06:53,601 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 99 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2024-10-31 22:06:53,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 558 flow [2024-10-31 22:06:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-10-31 22:06:53,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-10-31 22:06:53,603 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 294 flow. Second operand 3 states and 129 transitions. [2024-10-31 22:06:53,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 558 flow [2024-10-31 22:06:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 487 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-31 22:06:53,608 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 246 flow [2024-10-31 22:06:53,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2024-10-31 22:06:53,609 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2024-10-31 22:06:53,609 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 246 flow [2024-10-31 22:06:53,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-31 22:06:53,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:53,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:53,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:06:53,610 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:53,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash -117045361, now seen corresponding path program 1 times [2024-10-31 22:06:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:53,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588776287] [2024-10-31 22:06:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:53,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:53,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588776287] [2024-10-31 22:06:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588776287] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098400182] [2024-10-31 22:06:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:53,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:53,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:53,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-31 22:06:53,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-31 22:06:53,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:53,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-31 22:06:53,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:55,752 INFO L124 PetriNetUnfolderBase]: 12333/17526 cut-off events. [2024-10-31 22:06:55,753 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2024-10-31 22:06:55,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36974 conditions, 17526 events. 12333/17526 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 95948 event pairs, 4948 based on Foata normal form. 297/11634 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2024-10-31 22:06:55,846 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 102 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2024-10-31 22:06:55,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 518 flow [2024-10-31 22:06:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-10-31 22:06:55,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-10-31 22:06:55,851 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 246 flow. Second operand 3 states and 130 transitions. [2024-10-31 22:06:55,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 518 flow [2024-10-31 22:06:55,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:55,860 INFO L231 Difference]: Finished difference. Result has 70 places, 80 transitions, 255 flow [2024-10-31 22:06:55,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=70, PETRI_TRANSITIONS=80} [2024-10-31 22:06:55,864 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-10-31 22:06:55,864 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 80 transitions, 255 flow [2024-10-31 22:06:55,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-31 22:06:55,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:55,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:55,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:06:55,865 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:55,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232416, now seen corresponding path program 1 times [2024-10-31 22:06:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539128007] [2024-10-31 22:06:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:55,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:56,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:56,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539128007] [2024-10-31 22:06:56,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539128007] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:56,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:56,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187945334] [2024-10-31 22:06:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:56,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:56,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-31 22:06:56,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 80 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-10-31 22:06:56,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:56,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-31 22:06:56,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:57,851 INFO L124 PetriNetUnfolderBase]: 12946/18508 cut-off events. [2024-10-31 22:06:57,851 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-10-31 22:06:57,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40328 conditions, 18508 events. 12946/18508 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 102937 event pairs, 11912 based on Foata normal form. 112/12564 useless extension candidates. Maximal degree in co-relation 12447. Up to 17508 conditions per place. [2024-10-31 22:06:57,947 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 105 selfloop transitions, 8 changer transitions 3/120 dead transitions. [2024-10-31 22:06:57,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 611 flow [2024-10-31 22:06:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-10-31 22:06:57,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-10-31 22:06:57,949 INFO L175 Difference]: Start difference. First operand has 70 places, 80 transitions, 255 flow. Second operand 5 states and 166 transitions. [2024-10-31 22:06:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 611 flow [2024-10-31 22:06:57,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:57,954 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 320 flow [2024-10-31 22:06:57,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-10-31 22:06:57,955 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-10-31 22:06:57,955 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 320 flow [2024-10-31 22:06:57,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-10-31 22:06:57,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:57,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:57,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:06:57,956 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:06:57,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599918, now seen corresponding path program 1 times [2024-10-31 22:06:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233706665] [2024-10-31 22:06:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233706665] [2024-10-31 22:06:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233706665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:58,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376451127] [2024-10-31 22:06:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:58,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:58,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-31 22:06:58,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-10-31 22:06:58,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:58,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-31 22:06:58,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:59,988 INFO L124 PetriNetUnfolderBase]: 9843/14132 cut-off events. [2024-10-31 22:06:59,988 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-10-31 22:07:00,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31166 conditions, 14132 events. 9843/14132 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 76943 event pairs, 9001 based on Foata normal form. 0/10250 useless extension candidates. Maximal degree in co-relation 29133. Up to 14062 conditions per place. [2024-10-31 22:07:00,058 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 69 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2024-10-31 22:07:00,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 462 flow [2024-10-31 22:07:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:07:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:07:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-10-31 22:07:00,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.296 [2024-10-31 22:07:00,061 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 320 flow. Second operand 5 states and 111 transitions. [2024-10-31 22:07:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 462 flow [2024-10-31 22:07:00,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:07:00,067 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 320 flow [2024-10-31 22:07:00,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-10-31 22:07:00,069 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-10-31 22:07:00,069 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 320 flow [2024-10-31 22:07:00,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-10-31 22:07:00,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:00,070 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:00,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:07:00,070 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:07:00,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599919, now seen corresponding path program 1 times [2024-10-31 22:07:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:00,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039013258] [2024-10-31 22:07:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:07:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039013258] [2024-10-31 22:07:00,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039013258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:07:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170801242] [2024-10-31 22:07:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:07:00,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:07:00,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:07:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:00,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 22:07:00,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:07:00,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:07:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:07:01,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 22:07:01,068 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:07:01,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:07:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:07:01,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 22:07:01,125 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:07:01,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:07:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:07:01,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:07:01,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170801242] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:01,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:07:01,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-10-31 22:07:01,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598238159] [2024-10-31 22:07:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:01,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:07:01,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:07:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:07:01,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-31 22:07:01,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2024-10-31 22:07:01,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:01,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-31 22:07:01,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:02,342 INFO L124 PetriNetUnfolderBase]: 7310/10556 cut-off events. [2024-10-31 22:07:02,342 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-10-31 22:07:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22898 conditions, 10556 events. 7310/10556 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 55314 event pairs, 6640 based on Foata normal form. 568/8326 useless extension candidates. Maximal degree in co-relation 20779. Up to 10519 conditions per place. [2024-10-31 22:07:02,396 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-10-31 22:07:02,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 454 flow [2024-10-31 22:07:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:07:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:07:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-31 22:07:02,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-10-31 22:07:02,398 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 320 flow. Second operand 4 states and 96 transitions. [2024-10-31 22:07:02,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 454 flow [2024-10-31 22:07:02,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:07:02,401 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 304 flow [2024-10-31 22:07:02,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-10-31 22:07:02,402 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-10-31 22:07:02,402 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 304 flow [2024-10-31 22:07:02,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2024-10-31 22:07:02,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:02,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:02,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:07:02,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7285621-b889-40f2-a98e-77467de2dd26/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:02,604 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:07:02,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1711860245, now seen corresponding path program 1 times [2024-10-31 22:07:02,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202261704] [2024-10-31 22:07:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:07:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202261704] [2024-10-31 22:07:02,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202261704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:02,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:07:02,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:07:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459989546] [2024-10-31 22:07:02,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:02,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:07:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:07:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:07:02,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-31 22:07:02,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-10-31 22:07:02,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:02,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-31 22:07:02,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:03,747 INFO L124 PetriNetUnfolderBase]: 5974/8687 cut-off events. [2024-10-31 22:07:03,747 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-10-31 22:07:03,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 8687 events. 5974/8687 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43405 event pairs, 2918 based on Foata normal form. 158/6500 useless extension candidates. Maximal degree in co-relation 16909. Up to 6301 conditions per place. [2024-10-31 22:07:03,791 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 99 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-10-31 22:07:03,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 575 flow [2024-10-31 22:07:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:07:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:07:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-10-31 22:07:03,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-10-31 22:07:03,793 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 304 flow. Second operand 3 states and 123 transitions. [2024-10-31 22:07:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 575 flow [2024-10-31 22:07:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:07:03,799 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 315 flow [2024-10-31 22:07:03,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-10-31 22:07:03,800 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-10-31 22:07:03,800 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 315 flow [2024-10-31 22:07:03,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-10-31 22:07:03,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:03,801 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:03,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:07:03,801 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-31 22:07:03,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1213487871, now seen corresponding path program 1 times [2024-10-31 22:07:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:03,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631285674] [2024-10-31 22:07:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:07:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631285674] [2024-10-31 22:07:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631285674] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:04,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:07:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:07:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521338024] [2024-10-31 22:07:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:04,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:07:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:07:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:07:04,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-31 22:07:04,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2024-10-31 22:07:04,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:04,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-31 22:07:04,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand