./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:33:47,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:33:47,656 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:33:47,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:33:47,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:33:47,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:33:47,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:33:47,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:33:47,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:33:47,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:33:47,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:33:47,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:33:47,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:33:47,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:33:47,697 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:33:47,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:33:47,698 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:33:47,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:33:47,699 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:33:47,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:33:47,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:33:47,701 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:33:47,705 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:33:47,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:33:47,706 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:33:47,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:33:47,706 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:33:47,707 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:33:47,707 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:33:47,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:33:47,708 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:33:47,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:33:47,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:33:47,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:33:47,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:33:47,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:33:47,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:33:47,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:33:47,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:33:47,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:33:47,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:33:47,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:33:47,714 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_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-08 17:33:48,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:33:48,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:33:48,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:33:48,122 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:33:48,123 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:33:48,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c Unable to find full path for "g++" [2024-11-08 17:33:50,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:33:50,574 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:33:50,576 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-08 17:33:50,590 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/data/776a6d662/a3dd8a4e37994352816e296f99f37235/FLAG6d22f91ba [2024-11-08 17:33:50,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/data/776a6d662/a3dd8a4e37994352816e296f99f37235 [2024-11-08 17:33:50,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:33:50,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:33:50,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:50,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:33:50,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:33:50,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:50" (1/1) ... [2024-11-08 17:33:50,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9c0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:50, skipping insertion in model container [2024-11-08 17:33:50,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:50" (1/1) ... [2024-11-08 17:33:50,959 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:33:51,239 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:33:51,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:51,256 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:33:51,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:51,324 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:33:51,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51 WrapperNode [2024-11-08 17:33:51,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:51,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:51,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:33:51,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:33:51,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,410 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-11-08 17:33:51,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:51,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:33:51,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:33:51,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:33:51,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,494 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]. [2024-11-08 17:33:51,494 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:33:51,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:33:51,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:33:51,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:33:51,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (1/1) ... [2024-11-08 17:33:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:33:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:51,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:33:51,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:33:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:33:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:33:51,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:33:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:33:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:33:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:33:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:33:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:33:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:33:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:33:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:33:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:33:51,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:33:51,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:33:51,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:33:51,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:33:51,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:33:51,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:33:51,642 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:33:51,829 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:33:51,833 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:33:52,749 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:33:52,750 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:33:53,309 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:33:53,310 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 17:33:53,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:53 BoogieIcfgContainer [2024-11-08 17:33:53,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:33:53,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:33:53,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:33:53,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:33:53,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:33:50" (1/3) ... [2024-11-08 17:33:53,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313e1cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:53, skipping insertion in model container [2024-11-08 17:33:53,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:51" (2/3) ... [2024-11-08 17:33:53,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313e1cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:53, skipping insertion in model container [2024-11-08 17:33:53,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:53" (3/3) ... [2024-11-08 17:33:53,326 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-08 17:33:53,349 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:33:53,349 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-08 17:33:53,349 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:33:53,445 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:33:53,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 97 transitions, 215 flow [2024-11-08 17:33:53,576 INFO L124 PetriNetUnfolderBase]: 20/94 cut-off events. [2024-11-08 17:33:53,577 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:33:53,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 20/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2024-11-08 17:33:53,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 97 transitions, 215 flow [2024-11-08 17:33:53,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 93 transitions, 204 flow [2024-11-08 17:33:53,606 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:33:53,617 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;@c7e6364, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:33:53,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-08 17:33:53,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:33:53,626 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:33:53,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:33:53,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:53,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:53,627 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:33:53,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash 32138044, now seen corresponding path program 1 times [2024-11-08 17:33:53,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:53,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473565526] [2024-11-08 17:33:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473565526] [2024-11-08 17:33:54,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473565526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:54,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:33:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202505636] [2024-11-08 17:33:54,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:54,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:33:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:33:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:33:54,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-08 17:33:54,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:54,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:54,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-08 17:33:54,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:55,987 INFO L124 PetriNetUnfolderBase]: 7259/10535 cut-off events. [2024-11-08 17:33:55,988 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-11-08 17:33:56,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20351 conditions, 10535 events. 7259/10535 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69487 event pairs, 5236 based on Foata normal form. 1/5695 useless extension candidates. Maximal degree in co-relation 19654. Up to 9450 conditions per place. [2024-11-08 17:33:56,106 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 54 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-08 17:33:56,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 300 flow [2024-11-08 17:33:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:33:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:33:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-08 17:33:56,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567010309278351 [2024-11-08 17:33:56,126 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 204 flow. Second operand 3 states and 162 transitions. [2024-11-08 17:33:56,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 300 flow [2024-11-08 17:33:56,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:33:56,145 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 180 flow [2024-11-08 17:33:56,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2024-11-08 17:33:56,151 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -9 predicate places. [2024-11-08 17:33:56,152 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 180 flow [2024-11-08 17:33:56,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:56,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:56,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:56,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:33:56,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:33:56,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 32138045, now seen corresponding path program 1 times [2024-11-08 17:33:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068673548] [2024-11-08 17:33:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068673548] [2024-11-08 17:33:56,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068673548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:56,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:56,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:56,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033094992] [2024-11-08 17:33:56,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:56,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:33:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:33:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:33:56,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 97 [2024-11-08 17:33:56,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 97 [2024-11-08 17:33:56,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:58,346 INFO L124 PetriNetUnfolderBase]: 7265/10556 cut-off events. [2024-11-08 17:33:58,346 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-08 17:33:58,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20185 conditions, 10556 events. 7265/10556 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69481 event pairs, 5236 based on Foata normal form. 0/5703 useless extension candidates. Maximal degree in co-relation 20092. Up to 9473 conditions per place. [2024-11-08 17:33:58,433 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 76 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-11-08 17:33:58,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 106 transitions, 404 flow [2024-11-08 17:33:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:33:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:33:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-08 17:33:58,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4845360824742268 [2024-11-08 17:33:58,440 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 180 flow. Second operand 4 states and 188 transitions. [2024-11-08 17:33:58,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 106 transitions, 404 flow [2024-11-08 17:33:58,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:58,444 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 268 flow [2024-11-08 17:33:58,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2024-11-08 17:33:58,448 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-08 17:33:58,448 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 268 flow [2024-11-08 17:33:58,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:58,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:58,449 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:33:58,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:33:58,450 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:33:58,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash -352172172, now seen corresponding path program 1 times [2024-11-08 17:33:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:58,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293900769] [2024-11-08 17:33:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:59,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293900769] [2024-11-08 17:33:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293900769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384784567] [2024-11-08 17:33:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:59,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:59,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:59,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:59,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:33:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:59,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:33:59,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:59,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 17:33:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:59,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384784567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:00,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:00,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:34:00,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052385347] [2024-11-08 17:34:00,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:00,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:34:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:34:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:34:00,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 97 [2024-11-08 17:34:00,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 268 flow. Second operand has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:00,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:00,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 97 [2024-11-08 17:34:00,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:02,461 INFO L124 PetriNetUnfolderBase]: 7262/10550 cut-off events. [2024-11-08 17:34:02,462 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-08 17:34:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20203 conditions, 10550 events. 7262/10550 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69443 event pairs, 5236 based on Foata normal form. 0/5709 useless extension candidates. Maximal degree in co-relation 20111. Up to 9452 conditions per place. [2024-11-08 17:34:02,547 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 63 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-11-08 17:34:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 434 flow [2024-11-08 17:34:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-11-08 17:34:02,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40034364261168387 [2024-11-08 17:34:02,550 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 268 flow. Second operand 6 states and 233 transitions. [2024-11-08 17:34:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 434 flow [2024-11-08 17:34:02,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:34:02,554 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 308 flow [2024-11-08 17:34:02,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-11-08 17:34:02,556 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-08 17:34:02,556 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 308 flow [2024-11-08 17:34:02,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:02,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:02,557 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:02,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:34:02,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:02,758 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:02,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2046070360, now seen corresponding path program 1 times [2024-11-08 17:34:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:02,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111446393] [2024-11-08 17:34:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111446393] [2024-11-08 17:34:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111446393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:34:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110445066] [2024-11-08 17:34:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:02,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:02,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-08 17:34:02,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:02,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:02,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-08 17:34:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:05,389 INFO L124 PetriNetUnfolderBase]: 12113/17652 cut-off events. [2024-11-08 17:34:05,389 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-08 17:34:05,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33768 conditions, 17652 events. 12113/17652 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 121976 event pairs, 4256 based on Foata normal form. 350/10129 useless extension candidates. Maximal degree in co-relation 33710. Up to 9751 conditions per place. [2024-11-08 17:34:05,535 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 99 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2024-11-08 17:34:05,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 131 transitions, 590 flow [2024-11-08 17:34:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2024-11-08 17:34:05,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.711340206185567 [2024-11-08 17:34:05,538 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 308 flow. Second operand 3 states and 207 transitions. [2024-11-08 17:34:05,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 131 transitions, 590 flow [2024-11-08 17:34:05,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 131 transitions, 528 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-08 17:34:05,546 INFO L231 Difference]: Finished difference. Result has 77 places, 96 transitions, 275 flow [2024-11-08 17:34:05,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=77, PETRI_TRANSITIONS=96} [2024-11-08 17:34:05,549 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-08 17:34:05,549 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 96 transitions, 275 flow [2024-11-08 17:34:05,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:05,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:05,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:05,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:34:05,550 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:05,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash 996330377, now seen corresponding path program 1 times [2024-11-08 17:34:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716503472] [2024-11-08 17:34:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:05,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:05,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716503472] [2024-11-08 17:34:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716503472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:05,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699557922] [2024-11-08 17:34:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:05,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:05,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:05,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 97 [2024-11-08 17:34:05,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 96 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:05,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:05,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 97 [2024-11-08 17:34:05,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:07,886 INFO L124 PetriNetUnfolderBase]: 15261/21880 cut-off events. [2024-11-08 17:34:07,887 INFO L125 PetriNetUnfolderBase]: For 1285/1309 co-relation queries the response was YES. [2024-11-08 17:34:07,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45027 conditions, 21880 events. 15261/21880 cut-off events. For 1285/1309 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 137758 event pairs, 5655 based on Foata normal form. 0/14498 useless extension candidates. Maximal degree in co-relation 44984. Up to 10528 conditions per place. [2024-11-08 17:34:08,062 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 100 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2024-11-08 17:34:08,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 128 transitions, 555 flow [2024-11-08 17:34:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-08 17:34:08,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6426116838487973 [2024-11-08 17:34:08,065 INFO L175 Difference]: Start difference. First operand has 77 places, 96 transitions, 275 flow. Second operand 3 states and 187 transitions. [2024-11-08 17:34:08,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 128 transitions, 555 flow [2024-11-08 17:34:08,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 128 transitions, 552 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:34:08,073 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 294 flow [2024-11-08 17:34:08,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2024-11-08 17:34:08,074 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-08 17:34:08,074 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 294 flow [2024-11-08 17:34:08,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:08,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:08,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:08,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:34:08,076 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:08,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1849659906, now seen corresponding path program 1 times [2024-11-08 17:34:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:08,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710691502] [2024-11-08 17:34:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:08,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:08,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710691502] [2024-11-08 17:34:08,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710691502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:08,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:08,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:08,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521936350] [2024-11-08 17:34:08,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:08,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:08,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:08,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-08 17:34:08,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:08,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:08,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-08 17:34:08,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:11,065 INFO L124 PetriNetUnfolderBase]: 19160/28512 cut-off events. [2024-11-08 17:34:11,065 INFO L125 PetriNetUnfolderBase]: For 4829/4993 co-relation queries the response was YES. [2024-11-08 17:34:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60782 conditions, 28512 events. 19160/28512 cut-off events. For 4829/4993 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 194738 event pairs, 7868 based on Foata normal form. 482/19488 useless extension candidates. Maximal degree in co-relation 60738. Up to 12927 conditions per place. [2024-11-08 17:34:11,293 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 105 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2024-11-08 17:34:11,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 137 transitions, 616 flow [2024-11-08 17:34:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2024-11-08 17:34:11,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.711340206185567 [2024-11-08 17:34:11,295 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 294 flow. Second operand 3 states and 207 transitions. [2024-11-08 17:34:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 137 transitions, 616 flow [2024-11-08 17:34:11,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 137 transitions, 604 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:11,309 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 302 flow [2024-11-08 17:34:11,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-11-08 17:34:11,311 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2024-11-08 17:34:11,311 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 302 flow [2024-11-08 17:34:11,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:11,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:11,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:11,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:34:11,312 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:11,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1504880115, now seen corresponding path program 1 times [2024-11-08 17:34:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753734824] [2024-11-08 17:34:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753734824] [2024-11-08 17:34:11,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753734824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458859056] [2024-11-08 17:34:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:11,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:11,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-08 17:34:11,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:11,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:11,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-08 17:34:11,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:14,895 INFO L124 PetriNetUnfolderBase]: 23773/34290 cut-off events. [2024-11-08 17:34:14,895 INFO L125 PetriNetUnfolderBase]: For 4334/4748 co-relation queries the response was YES. [2024-11-08 17:34:14,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73092 conditions, 34290 events. 23773/34290 cut-off events. For 4334/4748 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 225470 event pairs, 11883 based on Foata normal form. 0/23413 useless extension candidates. Maximal degree in co-relation 73047. Up to 20207 conditions per place. [2024-11-08 17:34:15,108 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 102 selfloop transitions, 4 changer transitions 0/133 dead transitions. [2024-11-08 17:34:15,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 133 transitions, 605 flow [2024-11-08 17:34:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-11-08 17:34:15,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6701030927835051 [2024-11-08 17:34:15,111 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 302 flow. Second operand 3 states and 195 transitions. [2024-11-08 17:34:15,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 133 transitions, 605 flow [2024-11-08 17:34:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 133 transitions, 603 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:34:15,116 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 318 flow [2024-11-08 17:34:15,117 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2024-11-08 17:34:15,117 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2024-11-08 17:34:15,118 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 318 flow [2024-11-08 17:34:15,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:15,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:15,118 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:15,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 17:34:15,119 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:15,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1927547753, now seen corresponding path program 1 times [2024-11-08 17:34:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422313190] [2024-11-08 17:34:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422313190] [2024-11-08 17:34:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422313190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:15,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886142023] [2024-11-08 17:34:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:15,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:34:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:34:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:34:15,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-08 17:34:15,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:15,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:15,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-08 17:34:15,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:18,469 INFO L124 PetriNetUnfolderBase]: 21344/31745 cut-off events. [2024-11-08 17:34:18,469 INFO L125 PetriNetUnfolderBase]: For 8796/9498 co-relation queries the response was YES. [2024-11-08 17:34:18,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70233 conditions, 31745 events. 21344/31745 cut-off events. For 8796/9498 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 213399 event pairs, 16426 based on Foata normal form. 112/21834 useless extension candidates. Maximal degree in co-relation 70157. Up to 26830 conditions per place. [2024-11-08 17:34:18,846 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 111 selfloop transitions, 9 changer transitions 0/145 dead transitions. [2024-11-08 17:34:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 681 flow [2024-11-08 17:34:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:34:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:34:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-11-08 17:34:18,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402061855670103 [2024-11-08 17:34:18,848 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 318 flow. Second operand 5 states and 262 transitions. [2024-11-08 17:34:18,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 681 flow [2024-11-08 17:34:18,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 673 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:18,863 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 382 flow [2024-11-08 17:34:18,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-11-08 17:34:18,864 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 6 predicate places. [2024-11-08 17:34:18,864 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 382 flow [2024-11-08 17:34:18,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:18,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:18,865 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:18,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:34:18,866 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:18,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash 375563938, now seen corresponding path program 1 times [2024-11-08 17:34:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:18,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747834477] [2024-11-08 17:34:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:18,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747834477] [2024-11-08 17:34:18,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747834477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:18,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:18,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895659682] [2024-11-08 17:34:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:18,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:18,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:18,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-08 17:34:18,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:18,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-08 17:34:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:24,106 INFO L124 PetriNetUnfolderBase]: 37224/53397 cut-off events. [2024-11-08 17:34:24,107 INFO L125 PetriNetUnfolderBase]: For 12439/13623 co-relation queries the response was YES. [2024-11-08 17:34:24,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119879 conditions, 53397 events. 37224/53397 cut-off events. For 12439/13623 co-relation queries the response was YES. Maximal size of possible extension queue 2196. Compared 357041 event pairs, 21948 based on Foata normal form. 0/36593 useless extension candidates. Maximal degree in co-relation 119800. Up to 24976 conditions per place. [2024-11-08 17:34:24,485 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 107 selfloop transitions, 5 changer transitions 0/141 dead transitions. [2024-11-08 17:34:24,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 141 transitions, 715 flow [2024-11-08 17:34:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-11-08 17:34:24,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6701030927835051 [2024-11-08 17:34:24,487 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 382 flow. Second operand 3 states and 195 transitions. [2024-11-08 17:34:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 141 transitions, 715 flow [2024-11-08 17:34:24,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 711 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 17:34:24,504 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 404 flow [2024-11-08 17:34:24,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2024-11-08 17:34:24,506 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 9 predicate places. [2024-11-08 17:34:24,506 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 404 flow [2024-11-08 17:34:24,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:24,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:24,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:24,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 17:34:24,507 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:24,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2074361422, now seen corresponding path program 1 times [2024-11-08 17:34:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126036136] [2024-11-08 17:34:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:25,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:25,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126036136] [2024-11-08 17:34:25,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126036136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:25,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108957831] [2024-11-08 17:34:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:25,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:25,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:34:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:25,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 17:34:25,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:25,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:34:25,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:25,414 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 [2024-11-08 17:34:25,455 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 17:34:25,456 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 [2024-11-08 17:34:25,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:25,488 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 [2024-11-08 17:34:25,498 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:34:25,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:34:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:25,563 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:34:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108957831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:25,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:34:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2024-11-08 17:34:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438162428] [2024-11-08 17:34:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:25,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:34:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:34:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-08 17:34:25,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-11-08 17:34:25,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:25,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-11-08 17:34:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:29,212 INFO L124 PetriNetUnfolderBase]: 18930/28927 cut-off events. [2024-11-08 17:34:29,212 INFO L125 PetriNetUnfolderBase]: For 12553/13801 co-relation queries the response was YES. [2024-11-08 17:34:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64445 conditions, 28927 events. 18930/28927 cut-off events. For 12553/13801 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 197540 event pairs, 14916 based on Foata normal form. 1455/22741 useless extension candidates. Maximal degree in co-relation 64368. Up to 25039 conditions per place. [2024-11-08 17:34:29,406 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 67 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-11-08 17:34:29,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 97 transitions, 518 flow [2024-11-08 17:34:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:34:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:34:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-11-08 17:34:29,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4381443298969072 [2024-11-08 17:34:29,408 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 404 flow. Second operand 4 states and 170 transitions. [2024-11-08 17:34:29,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 97 transitions, 518 flow [2024-11-08 17:34:29,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:29,420 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 374 flow [2024-11-08 17:34:29,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=374, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-11-08 17:34:29,422 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 2 predicate places. [2024-11-08 17:34:29,422 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 374 flow [2024-11-08 17:34:29,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:29,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:29,423 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:29,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 17:34:29,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345a55ea-e7d6-4ef3-86ed-d16bbe4f562e/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 17:34:29,624 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:29,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1126159195, now seen corresponding path program 1 times [2024-11-08 17:34:29,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:29,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37546068] [2024-11-08 17:34:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 17:34:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37546068] [2024-11-08 17:34:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37546068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:29,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687442292] [2024-11-08 17:34:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:29,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:29,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-08 17:34:29,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:29,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:29,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-08 17:34:29,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:33,526 INFO L124 PetriNetUnfolderBase]: 24426/36168 cut-off events. [2024-11-08 17:34:33,526 INFO L125 PetriNetUnfolderBase]: For 12311/14592 co-relation queries the response was YES. [2024-11-08 17:34:33,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81579 conditions, 36168 events. 24426/36168 cut-off events. For 12311/14592 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 232375 event pairs, 8589 based on Foata normal form. 732/28113 useless extension candidates. Maximal degree in co-relation 81506. Up to 23607 conditions per place. [2024-11-08 17:34:33,994 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 93 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-11-08 17:34:33,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 128 transitions, 657 flow [2024-11-08 17:34:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-11-08 17:34:33,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6494845360824743 [2024-11-08 17:34:33,996 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 374 flow. Second operand 3 states and 189 transitions. [2024-11-08 17:34:33,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 128 transitions, 657 flow [2024-11-08 17:34:34,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 652 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:34,008 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 387 flow [2024-11-08 17:34:34,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-11-08 17:34:34,010 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2024-11-08 17:34:34,010 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 387 flow [2024-11-08 17:34:34,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:34,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:34,011 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:34,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:34:34,011 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:34,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1995670891, now seen corresponding path program 1 times [2024-11-08 17:34:34,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:34,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605475350] [2024-11-08 17:34:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:34,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:34,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605475350] [2024-11-08 17:34:34,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605475350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:34,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:34,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357807904] [2024-11-08 17:34:34,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:34,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:34,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-08 17:34:34,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:34,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:34,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-08 17:34:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:37,766 INFO L124 PetriNetUnfolderBase]: 24436/36240 cut-off events. [2024-11-08 17:34:37,766 INFO L125 PetriNetUnfolderBase]: For 15011/17310 co-relation queries the response was YES. [2024-11-08 17:34:37,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84143 conditions, 36240 events. 24436/36240 cut-off events. For 15011/17310 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 233654 event pairs, 8400 based on Foata normal form. 3/27370 useless extension candidates. Maximal degree in co-relation 84069. Up to 29833 conditions per place. [2024-11-08 17:34:38,002 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 70 selfloop transitions, 2 changer transitions 13/116 dead transitions. [2024-11-08 17:34:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 600 flow [2024-11-08 17:34:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:34:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:34:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-08 17:34:38,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6013745704467354 [2024-11-08 17:34:38,004 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 387 flow. Second operand 3 states and 175 transitions. [2024-11-08 17:34:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 600 flow [2024-11-08 17:34:38,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:34:38,016 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 341 flow [2024-11-08 17:34:38,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-11-08 17:34:38,017 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2024-11-08 17:34:38,017 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 341 flow [2024-11-08 17:34:38,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:38,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:38,018 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:38,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 17:34:38,019 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:38,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 335903907, now seen corresponding path program 1 times [2024-11-08 17:34:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195796390] [2024-11-08 17:34:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 17:34:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195796390] [2024-11-08 17:34:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195796390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:38,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:34:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921343398] [2024-11-08 17:34:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:38,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:34:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:34:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:34:38,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-08 17:34:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 341 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:38,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:38,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-08 17:34:38,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:41,626 INFO L124 PetriNetUnfolderBase]: 20689/30947 cut-off events. [2024-11-08 17:34:41,627 INFO L125 PetriNetUnfolderBase]: For 15249/17274 co-relation queries the response was YES. [2024-11-08 17:34:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72052 conditions, 30947 events. 20689/30947 cut-off events. For 15249/17274 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 202839 event pairs, 16143 based on Foata normal form. 0/24316 useless extension candidates. Maximal degree in co-relation 72009. Up to 27585 conditions per place. [2024-11-08 17:34:41,882 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 53 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-11-08 17:34:41,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 449 flow [2024-11-08 17:34:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:34:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:34:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-08 17:34:41,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4639175257731959 [2024-11-08 17:34:41,884 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 341 flow. Second operand 4 states and 180 transitions. [2024-11-08 17:34:41,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 449 flow [2024-11-08 17:34:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 435 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:41,899 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 329 flow [2024-11-08 17:34:41,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=329, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-11-08 17:34:41,900 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2024-11-08 17:34:41,900 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 329 flow [2024-11-08 17:34:41,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:41,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:41,901 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:41,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 17:34:41,902 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:41,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1913803812, now seen corresponding path program 1 times [2024-11-08 17:34:41,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:41,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880915513] [2024-11-08 17:34:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 17:34:42,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:42,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880915513] [2024-11-08 17:34:42,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880915513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:42,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:42,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:34:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901225126] [2024-11-08 17:34:42,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:42,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:34:42,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:34:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:34:42,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 97 [2024-11-08 17:34:42,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:42,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:42,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 97 [2024-11-08 17:34:42,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:46,582 INFO L124 PetriNetUnfolderBase]: 26936/40841 cut-off events. [2024-11-08 17:34:46,582 INFO L125 PetriNetUnfolderBase]: For 18612/21075 co-relation queries the response was YES. [2024-11-08 17:34:46,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93671 conditions, 40841 events. 26936/40841 cut-off events. For 18612/21075 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 276816 event pairs, 21455 based on Foata normal form. 340/32277 useless extension candidates. Maximal degree in co-relation 93628. Up to 27588 conditions per place. [2024-11-08 17:34:46,837 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 89 selfloop transitions, 9 changer transitions 0/124 dead transitions. [2024-11-08 17:34:46,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 643 flow [2024-11-08 17:34:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:34:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:34:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-11-08 17:34:46,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49072164948453606 [2024-11-08 17:34:46,840 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 329 flow. Second operand 5 states and 238 transitions. [2024-11-08 17:34:46,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 643 flow [2024-11-08 17:34:46,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 638 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:46,849 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 362 flow [2024-11-08 17:34:46,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-11-08 17:34:46,850 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2024-11-08 17:34:46,850 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 362 flow [2024-11-08 17:34:46,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:46,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:46,851 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:46,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 17:34:46,851 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-08 17:34:46,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 919527944, now seen corresponding path program 1 times [2024-11-08 17:34:46,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075735424] [2024-11-08 17:34:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:34:46,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075735424] [2024-11-08 17:34:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075735424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:46,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:34:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862092048] [2024-11-08 17:34:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:46,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:34:46,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:34:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:34:46,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 97 [2024-11-08 17:34:46,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:46,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:46,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 97 [2024-11-08 17:34:46,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand