./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI --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 d52a8576f41904f21a1a217cd81ed2d36ac8928d5a02d745a0c93a101e2535cf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:58,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:58,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:58:58,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:58,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:58,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:58,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:58,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:58,484 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:58,489 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:58,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:58,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:58,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:58,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:58,493 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:58,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:58,494 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:58,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:58,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:58,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:58,495 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:58:58,496 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:58:58,496 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:58:58,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:58,497 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:58:58,497 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:58:58,498 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:58,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:58,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:58,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:58,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:58,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:58,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:58,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:58,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:58,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:58,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:58,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:58,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:58,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:58,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:58,503 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_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d52a8576f41904f21a1a217cd81ed2d36ac8928d5a02d745a0c93a101e2535cf [2023-11-24 21:58:58,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:58,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:58,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:58,801 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:58,801 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:58,803 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe020_rmo.i [2023-11-24 21:59:01,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:02,451 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:02,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/sv-benchmarks/c/pthread-wmm/safe020_rmo.i [2023-11-24 21:59:02,482 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/data/2bfc475e6/9df9fdade4134609aee00cb05aa5b8bf/FLAG11d3035c4 [2023-11-24 21:59:02,502 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/data/2bfc475e6/9df9fdade4134609aee00cb05aa5b8bf [2023-11-24 21:59:02,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:02,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:02,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:02,515 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:02,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:02,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:02" (1/1) ... [2023-11-24 21:59:02,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58eb9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:02, skipping insertion in model container [2023-11-24 21:59:02,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:02" (1/1) ... [2023-11-24 21:59:02,597 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:03,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:03,166 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:03,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:03,287 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:59:03,287 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:59:03,297 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:03,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03 WrapperNode [2023-11-24 21:59:03,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:03,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:03,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:03,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:03,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,395 INFO L138 Inliner]: procedures = 176, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 138 [2023-11-24 21:59:03,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:03,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:03,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:03,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:03,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,434 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,477 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 21, 1, 1, 1]. 81 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 11 writes are split as follows [0, 8, 1, 1, 1]. [2023-11-24 21:59:03,477 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:03,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:03,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:03,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:03,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (1/1) ... [2023-11-24 21:59:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:03,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:03,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803a4f52-c664-4c9a-86d6-677693ff8801/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:59:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:59:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:59:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:59:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:59:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:59:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:59:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:59:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:59:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:59:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:59:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:59:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:59:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:59:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 21:59:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 21:59:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 21:59:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 21:59:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 21:59:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 21:59:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:59:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:59:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:59:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:59:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:59:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:59:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:03,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:03,660 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:59:03,902 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:03,905 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:04,741 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:05,352 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:05,352 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:59:05,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:05 BoogieIcfgContainer [2023-11-24 21:59:05,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:05,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:05,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:05,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:05,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:02" (1/3) ... [2023-11-24 21:59:05,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6b4718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:05, skipping insertion in model container [2023-11-24 21:59:05,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:03" (2/3) ... [2023-11-24 21:59:05,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6b4718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:05, skipping insertion in model container [2023-11-24 21:59:05,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:05" (3/3) ... [2023-11-24 21:59:05,365 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2023-11-24 21:59:05,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:05,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-11-24 21:59:05,387 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:59:05,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:59:05,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 196 flow [2023-11-24 21:59:05,670 INFO L124 PetriNetUnfolderBase]: 2/89 cut-off events. [2023-11-24 21:59:05,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 315 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-11-24 21:59:05,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 196 flow [2023-11-24 21:59:05,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 89 transitions, 187 flow [2023-11-24 21:59:05,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:05,714 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d956ac6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:05,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2023-11-24 21:59:05,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:59:05,720 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:59:05,720 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:05,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:05,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:59:05,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:05,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:05,726 INFO L85 PathProgramCache]: Analyzing trace with hash 25179, now seen corresponding path program 1 times [2023-11-24 21:59:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123694255] [2023-11-24 21:59:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123694255] [2023-11-24 21:59:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123694255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:06,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:06,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:59:06,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844550916] [2023-11-24 21:59:06,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:06,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:06,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 92 [2023-11-24 21:59:06,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 92 [2023-11-24 21:59:06,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:13,094 INFO L124 PetriNetUnfolderBase]: 19179/29497 cut-off events. [2023-11-24 21:59:13,094 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-24 21:59:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56405 conditions, 29497 events. 19179/29497 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 267440 event pairs, 16579 based on Foata normal form. 1000/15225 useless extension candidates. Maximal degree in co-relation 56391. Up to 23191 conditions per place. [2023-11-24 21:59:13,415 INFO L140 encePairwiseOnDemand]: 67/92 looper letters, 63 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-24 21:59:13,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 313 flow [2023-11-24 21:59:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-11-24 21:59:13,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2023-11-24 21:59:13,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-11-24 21:59:13,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-11-24 21:59:13,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:13,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-11-24 21:59:13,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,461 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 187 flow. Second operand 3 states and 183 transitions. [2023-11-24 21:59:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 313 flow [2023-11-24 21:59:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:59:13,473 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 140 flow [2023-11-24 21:59:13,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-11-24 21:59:13,479 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -23 predicate places. [2023-11-24 21:59:13,480 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 140 flow [2023-11-24 21:59:13,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:13,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:59:13,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:13,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:13,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 25180, now seen corresponding path program 1 times [2023-11-24 21:59:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649639501] [2023-11-24 21:59:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:13,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649639501] [2023-11-24 21:59:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649639501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:13,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:59:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856843410] [2023-11-24 21:59:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:13,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:13,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 92 [2023-11-24 21:59:13,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:13,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 92 [2023-11-24 21:59:13,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:19,787 INFO L124 PetriNetUnfolderBase]: 19179/29496 cut-off events. [2023-11-24 21:59:19,787 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-24 21:59:19,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56902 conditions, 29496 events. 19179/29496 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 268258 event pairs, 16579 based on Foata normal form. 1/14225 useless extension candidates. Maximal degree in co-relation 56891. Up to 23190 conditions per place. [2023-11-24 21:59:20,049 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 62 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-11-24 21:59:20,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 310 flow [2023-11-24 21:59:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 21:59:20,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2023-11-24 21:59:20,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 21:59:20,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 21:59:20,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:20,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 21:59:20,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:20,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:20,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:20,070 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 140 flow. Second operand 3 states and 143 transitions. [2023-11-24 21:59:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 310 flow [2023-11-24 21:59:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:20,208 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 138 flow [2023-11-24 21:59:20,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-24 21:59:20,209 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -24 predicate places. [2023-11-24 21:59:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 138 flow [2023-11-24 21:59:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:20,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:59:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:59:20,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:20,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 750928845, now seen corresponding path program 1 times [2023-11-24 21:59:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:20,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673061809] [2023-11-24 21:59:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673061809] [2023-11-24 21:59:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673061809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:20,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762003362] [2023-11-24 21:59:20,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:20,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 92 [2023-11-24 21:59:20,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:20,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:20,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 92 [2023-11-24 21:59:20,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:25,423 INFO L124 PetriNetUnfolderBase]: 19183/29494 cut-off events. [2023-11-24 21:59:25,423 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-24 21:59:25,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56909 conditions, 29494 events. 19183/29494 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 266945 event pairs, 13216 based on Foata normal form. 0/14230 useless extension candidates. Maximal degree in co-relation 56898. Up to 23193 conditions per place. [2023-11-24 21:59:25,673 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 63 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-24 21:59:25,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 310 flow [2023-11-24 21:59:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-24 21:59:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-11-24 21:59:25,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-24 21:59:25,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-24 21:59:25,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:25,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-24 21:59:25,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 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) [2023-11-24 21:59:25,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,684 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 138 flow. Second operand 3 states and 141 transitions. [2023-11-24 21:59:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 310 flow [2023-11-24 21:59:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:25,795 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 136 flow [2023-11-24 21:59:25,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-11-24 21:59:25,798 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -25 predicate places. [2023-11-24 21:59:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 136 flow [2023-11-24 21:59:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:25,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:59:25,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:25,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:25,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash 750928846, now seen corresponding path program 1 times [2023-11-24 21:59:25,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:25,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826975985] [2023-11-24 21:59:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:25,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826975985] [2023-11-24 21:59:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826975985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:25,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:25,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041168867] [2023-11-24 21:59:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:25,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:25,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 92 [2023-11-24 21:59:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 92 [2023-11-24 21:59:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:30,554 INFO L124 PetriNetUnfolderBase]: 19179/29486 cut-off events. [2023-11-24 21:59:30,554 INFO L125 PetriNetUnfolderBase]: For 504/504 co-relation queries the response was YES. [2023-11-24 21:59:30,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56896 conditions, 29486 events. 19179/29486 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 266427 event pairs, 12095 based on Foata normal form. 5/14231 useless extension candidates. Maximal degree in co-relation 56886. Up to 23184 conditions per place. [2023-11-24 21:59:30,781 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 62 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-24 21:59:30,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 306 flow [2023-11-24 21:59:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 21:59:30,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2023-11-24 21:59:30,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 21:59:30,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 21:59:30,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:30,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 21:59:30,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,788 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 136 flow. Second operand 3 states and 143 transitions. [2023-11-24 21:59:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 306 flow [2023-11-24 21:59:30,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:30,817 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 134 flow [2023-11-24 21:59:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-11-24 21:59:30,833 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -26 predicate places. [2023-11-24 21:59:30,834 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 134 flow [2023-11-24 21:59:30,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:30,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:59:30,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 88252483, now seen corresponding path program 1 times [2023-11-24 21:59:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361242796] [2023-11-24 21:59:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361242796] [2023-11-24 21:59:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361242796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:30,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:30,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96370832] [2023-11-24 21:59:30,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:30,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:31,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 92 [2023-11-24 21:59:31,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:31,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 92 [2023-11-24 21:59:31,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:34,042 INFO L124 PetriNetUnfolderBase]: 8665/14188 cut-off events. [2023-11-24 21:59:34,042 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-11-24 21:59:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27194 conditions, 14188 events. 8665/14188 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 123840 event pairs, 5710 based on Foata normal form. 0/8600 useless extension candidates. Maximal degree in co-relation 27183. Up to 7436 conditions per place. [2023-11-24 21:59:34,139 INFO L140 encePairwiseOnDemand]: 76/92 looper letters, 65 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2023-11-24 21:59:34,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 336 flow [2023-11-24 21:59:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2023-11-24 21:59:34,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-24 21:59:34,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 192 transitions. [2023-11-24 21:59:34,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 192 transitions. [2023-11-24 21:59:34,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:34,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 192 transitions. [2023-11-24 21:59:34,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,146 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 134 flow. Second operand 4 states and 192 transitions. [2023-11-24 21:59:34,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 336 flow [2023-11-24 21:59:34,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:34,154 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 202 flow [2023-11-24 21:59:34,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-11-24 21:59:34,155 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -24 predicate places. [2023-11-24 21:59:34,155 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 202 flow [2023-11-24 21:59:34,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:34,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:34,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:59:34,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:34,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash 88252484, now seen corresponding path program 1 times [2023-11-24 21:59:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:34,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695865111] [2023-11-24 21:59:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:34,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:34,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695865111] [2023-11-24 21:59:34,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695865111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:34,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:34,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:34,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986424297] [2023-11-24 21:59:34,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:34,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:34,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2023-11-24 21:59:34,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2023-11-24 21:59:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:35,186 INFO L124 PetriNetUnfolderBase]: 2049/3742 cut-off events. [2023-11-24 21:59:35,186 INFO L125 PetriNetUnfolderBase]: For 1600/1615 co-relation queries the response was YES. [2023-11-24 21:59:35,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9477 conditions, 3742 events. 2049/3742 cut-off events. For 1600/1615 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28964 event pairs, 1377 based on Foata normal form. 1164/4660 useless extension candidates. Maximal degree in co-relation 9463. Up to 1842 conditions per place. [2023-11-24 21:59:35,216 INFO L140 encePairwiseOnDemand]: 81/92 looper letters, 42 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-24 21:59:35,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 298 flow [2023-11-24 21:59:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-24 21:59:35,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429347826086957 [2023-11-24 21:59:35,219 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-24 21:59:35,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-24 21:59:35,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:35,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-24 21:59:35,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,225 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 202 flow. Second operand 4 states and 163 transitions. [2023-11-24 21:59:35,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 298 flow [2023-11-24 21:59:35,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:35,232 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 186 flow [2023-11-24 21:59:35,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-24 21:59:35,237 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -31 predicate places. [2023-11-24 21:59:35,238 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 186 flow [2023-11-24 21:59:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:35,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:35,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:35,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:35,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1562606166, now seen corresponding path program 1 times [2023-11-24 21:59:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:35,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485185007] [2023-11-24 21:59:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:35,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:35,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485185007] [2023-11-24 21:59:35,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485185007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:35,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:35,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:35,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691971433] [2023-11-24 21:59:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:35,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:35,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 92 [2023-11-24 21:59:35,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:35,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 92 [2023-11-24 21:59:35,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:36,272 INFO L124 PetriNetUnfolderBase]: 2066/3752 cut-off events. [2023-11-24 21:59:36,272 INFO L125 PetriNetUnfolderBase]: For 1611/1627 co-relation queries the response was YES. [2023-11-24 21:59:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 3752 events. 2066/3752 cut-off events. For 1611/1627 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28999 event pairs, 1137 based on Foata normal form. 0/3505 useless extension candidates. Maximal degree in co-relation 9560. Up to 1872 conditions per place. [2023-11-24 21:59:36,295 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 43 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-24 21:59:36,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 300 flow [2023-11-24 21:59:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-11-24 21:59:36,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-11-24 21:59:36,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-11-24 21:59:36,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-11-24 21:59:36,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:36,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-11-24 21:59:36,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:59:36,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,301 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 186 flow. Second operand 3 states and 116 transitions. [2023-11-24 21:59:36,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 300 flow [2023-11-24 21:59:36,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:36,306 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 185 flow [2023-11-24 21:59:36,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-11-24 21:59:36,307 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -32 predicate places. [2023-11-24 21:59:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 185 flow [2023-11-24 21:59:36,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:36,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:36,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:36,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:36,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1562606165, now seen corresponding path program 1 times [2023-11-24 21:59:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686995595] [2023-11-24 21:59:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:36,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686995595] [2023-11-24 21:59:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686995595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:36,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117393542] [2023-11-24 21:59:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:36,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 92 [2023-11-24 21:59:36,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:36,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 92 [2023-11-24 21:59:36,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:37,604 INFO L124 PetriNetUnfolderBase]: 2049/3723 cut-off events. [2023-11-24 21:59:37,604 INFO L125 PetriNetUnfolderBase]: For 1610/1626 co-relation queries the response was YES. [2023-11-24 21:59:37,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9566 conditions, 3723 events. 2049/3723 cut-off events. For 1610/1626 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28862 event pairs, 1134 based on Foata normal form. 12/3488 useless extension candidates. Maximal degree in co-relation 9552. Up to 1872 conditions per place. [2023-11-24 21:59:37,633 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 42 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-24 21:59:37,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 297 flow [2023-11-24 21:59:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-24 21:59:37,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2023-11-24 21:59:37,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-24 21:59:37,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-24 21:59:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:37,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-24 21:59:37,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:59:37,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:37,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:37,640 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 185 flow. Second operand 3 states and 118 transitions. [2023-11-24 21:59:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 297 flow [2023-11-24 21:59:37,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:37,644 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 183 flow [2023-11-24 21:59:37,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-24 21:59:37,646 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -33 predicate places. [2023-11-24 21:59:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 183 flow [2023-11-24 21:59:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:59:37,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:37,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1954862089, now seen corresponding path program 1 times [2023-11-24 21:59:37,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:37,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891786743] [2023-11-24 21:59:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:37,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:37,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891786743] [2023-11-24 21:59:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891786743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:37,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:37,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:59:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027178801] [2023-11-24 21:59:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:37,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2023-11-24 21:59:37,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:37,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:37,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2023-11-24 21:59:37,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:38,780 INFO L124 PetriNetUnfolderBase]: 1991/3651 cut-off events. [2023-11-24 21:59:38,780 INFO L125 PetriNetUnfolderBase]: For 1396/1402 co-relation queries the response was YES. [2023-11-24 21:59:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9368 conditions, 3651 events. 1991/3651 cut-off events. For 1396/1402 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28128 event pairs, 740 based on Foata normal form. 0/3459 useless extension candidates. Maximal degree in co-relation 9354. Up to 2466 conditions per place. [2023-11-24 21:59:38,804 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 53 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-24 21:59:38,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 375 flow [2023-11-24 21:59:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-24 21:59:38,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746376811594203 [2023-11-24 21:59:38,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-24 21:59:38,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-24 21:59:38,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:38,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-24 21:59:38,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:59:38,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,809 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 183 flow. Second operand 3 states and 131 transitions. [2023-11-24 21:59:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 375 flow [2023-11-24 21:59:38,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:38,814 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 192 flow [2023-11-24 21:59:38,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-24 21:59:38,815 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -32 predicate places. [2023-11-24 21:59:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 192 flow [2023-11-24 21:59:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:38,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:59:38,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:38,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:38,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1721855324, now seen corresponding path program 1 times [2023-11-24 21:59:38,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:38,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456029354] [2023-11-24 21:59:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456029354] [2023-11-24 21:59:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456029354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:38,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394106358] [2023-11-24 21:59:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:38,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2023-11-24 21:59:38,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:38,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2023-11-24 21:59:38,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:39,889 INFO L124 PetriNetUnfolderBase]: 2080/3940 cut-off events. [2023-11-24 21:59:39,889 INFO L125 PetriNetUnfolderBase]: For 1688/1694 co-relation queries the response was YES. [2023-11-24 21:59:39,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 3940 events. 2080/3940 cut-off events. For 1688/1694 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 31691 event pairs, 620 based on Foata normal form. 0/3822 useless extension candidates. Maximal degree in co-relation 10260. Up to 1384 conditions per place. [2023-11-24 21:59:39,906 INFO L140 encePairwiseOnDemand]: 84/92 looper letters, 45 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2023-11-24 21:59:39,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 346 flow [2023-11-24 21:59:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-24 21:59:39,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429347826086957 [2023-11-24 21:59:39,908 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-24 21:59:39,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-24 21:59:39,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:39,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-24 21:59:39,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,911 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,911 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 192 flow. Second operand 4 states and 163 transitions. [2023-11-24 21:59:39,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 346 flow [2023-11-24 21:59:39,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:39,915 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 206 flow [2023-11-24 21:59:39,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-24 21:59:39,915 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -32 predicate places. [2023-11-24 21:59:39,916 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 206 flow [2023-11-24 21:59:39,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:39,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:39,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:59:39,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:39,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2071095617, now seen corresponding path program 1 times [2023-11-24 21:59:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:39,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535270458] [2023-11-24 21:59:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:39,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:40,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:40,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535270458] [2023-11-24 21:59:40,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535270458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:40,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:40,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:40,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201362645] [2023-11-24 21:59:40,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:40,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:40,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:40,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2023-11-24 21:59:40,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:40,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2023-11-24 21:59:40,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:40,781 INFO L124 PetriNetUnfolderBase]: 2005/3829 cut-off events. [2023-11-24 21:59:40,781 INFO L125 PetriNetUnfolderBase]: For 2145/2151 co-relation queries the response was YES. [2023-11-24 21:59:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10290 conditions, 3829 events. 2005/3829 cut-off events. For 2145/2151 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31003 event pairs, 712 based on Foata normal form. 36/3747 useless extension candidates. Maximal degree in co-relation 10274. Up to 2559 conditions per place. [2023-11-24 21:59:40,805 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 51 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-11-24 21:59:40,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 388 flow [2023-11-24 21:59:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2023-11-24 21:59:40,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421195652173913 [2023-11-24 21:59:40,808 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 155 transitions. [2023-11-24 21:59:40,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 155 transitions. [2023-11-24 21:59:40,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:40,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 155 transitions. [2023-11-24 21:59:40,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,811 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,811 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 206 flow. Second operand 4 states and 155 transitions. [2023-11-24 21:59:40,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 388 flow [2023-11-24 21:59:40,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:40,816 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 197 flow [2023-11-24 21:59:40,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-11-24 21:59:40,817 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -32 predicate places. [2023-11-24 21:59:40,817 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 197 flow [2023-11-24 21:59:40,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:40,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:59:40,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:40,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1072320225, now seen corresponding path program 1 times [2023-11-24 21:59:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:40,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945874591] [2023-11-24 21:59:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:40,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945874591] [2023-11-24 21:59:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945874591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:41,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:59:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866395654] [2023-11-24 21:59:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:59:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:59:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:59:41,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 92 [2023-11-24 21:59:41,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:41,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 92 [2023-11-24 21:59:41,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:43,022 INFO L124 PetriNetUnfolderBase]: 2007/3780 cut-off events. [2023-11-24 21:59:43,023 INFO L125 PetriNetUnfolderBase]: For 2011/2011 co-relation queries the response was YES. [2023-11-24 21:59:43,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10200 conditions, 3780 events. 2007/3780 cut-off events. For 2011/2011 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29642 event pairs, 547 based on Foata normal form. 0/3665 useless extension candidates. Maximal degree in co-relation 10183. Up to 2158 conditions per place. [2023-11-24 21:59:43,051 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 57 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2023-11-24 21:59:43,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 78 transitions, 401 flow [2023-11-24 21:59:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:59:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2023-11-24 21:59:43,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307453416149068 [2023-11-24 21:59:43,054 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 213 transitions. [2023-11-24 21:59:43,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 213 transitions. [2023-11-24 21:59:43,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:43,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 213 transitions. [2023-11-24 21:59:43,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,058 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 197 flow. Second operand 7 states and 213 transitions. [2023-11-24 21:59:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 78 transitions, 401 flow [2023-11-24 21:59:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:43,063 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 215 flow [2023-11-24 21:59:43,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-11-24 21:59:43,066 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -28 predicate places. [2023-11-24 21:59:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 215 flow [2023-11-24 21:59:43,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:43,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:59:43,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:43,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1072318601, now seen corresponding path program 1 times [2023-11-24 21:59:43,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277416472] [2023-11-24 21:59:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277416472] [2023-11-24 21:59:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277416472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:43,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:43,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:43,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045125839] [2023-11-24 21:59:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:43,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:43,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:43,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 92 [2023-11-24 21:59:43,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:43,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 92 [2023-11-24 21:59:43,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:44,336 INFO L124 PetriNetUnfolderBase]: 3100/5160 cut-off events. [2023-11-24 21:59:44,336 INFO L125 PetriNetUnfolderBase]: For 2850/2860 co-relation queries the response was YES. [2023-11-24 21:59:44,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13402 conditions, 5160 events. 3100/5160 cut-off events. For 2850/2860 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35078 event pairs, 600 based on Foata normal form. 100/5161 useless extension candidates. Maximal degree in co-relation 13385. Up to 3873 conditions per place. [2023-11-24 21:59:44,363 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 58 selfloop transitions, 5 changer transitions 2/78 dead transitions. [2023-11-24 21:59:44,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 78 transitions, 436 flow [2023-11-24 21:59:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-24 21:59:44,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-11-24 21:59:44,366 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-24 21:59:44,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-24 21:59:44,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:44,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-24 21:59:44,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:44,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:44,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:44,369 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 215 flow. Second operand 4 states and 152 transitions. [2023-11-24 21:59:44,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 78 transitions, 436 flow [2023-11-24 21:59:44,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 422 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:44,373 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 232 flow [2023-11-24 21:59:44,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-11-24 21:59:44,374 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -27 predicate places. [2023-11-24 21:59:44,374 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 232 flow [2023-11-24 21:59:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:44,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:44,375 INFO L208 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] [2023-11-24 21:59:44,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:59:44,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:44,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash -67043103, now seen corresponding path program 1 times [2023-11-24 21:59:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164073937] [2023-11-24 21:59:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164073937] [2023-11-24 21:59:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164073937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745801721] [2023-11-24 21:59:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:44,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 92 [2023-11-24 21:59:44,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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) [2023-11-24 21:59:44,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:44,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 92 [2023-11-24 21:59:44,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:45,484 INFO L124 PetriNetUnfolderBase]: 1376/2320 cut-off events. [2023-11-24 21:59:45,484 INFO L125 PetriNetUnfolderBase]: For 1589/1599 co-relation queries the response was YES. [2023-11-24 21:59:45,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6261 conditions, 2320 events. 1376/2320 cut-off events. For 1589/1599 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12968 event pairs, 166 based on Foata normal form. 82/2375 useless extension candidates. Maximal degree in co-relation 6242. Up to 1253 conditions per place. [2023-11-24 21:59:45,505 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 64 selfloop transitions, 8 changer transitions 6/91 dead transitions. [2023-11-24 21:59:45,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 530 flow [2023-11-24 21:59:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:45,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2023-11-24 21:59:45,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108695652173913 [2023-11-24 21:59:45,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 189 transitions. [2023-11-24 21:59:45,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 189 transitions. [2023-11-24 21:59:45,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:45,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 189 transitions. [2023-11-24 21:59:45,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:45,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:45,513 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:45,513 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 232 flow. Second operand 5 states and 189 transitions. [2023-11-24 21:59:45,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 530 flow [2023-11-24 21:59:45,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 496 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:45,520 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 225 flow [2023-11-24 21:59:45,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-11-24 21:59:45,522 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -25 predicate places. [2023-11-24 21:59:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 225 flow [2023-11-24 21:59:45,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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) [2023-11-24 21:59:45,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:45,523 INFO L208 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] [2023-11-24 21:59:45,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:59:45,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2023-11-24 21:59:45,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1566541971, now seen corresponding path program 1 times [2023-11-24 21:59:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081042355] [2023-11-24 21:59:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat