./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --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_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/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_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/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_71e66628-a545-460d-9e59-ffac6d0552a6/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 a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:56:22,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:56:22,905 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:56:22,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:56:22,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:56:22,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:56:22,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:56:22,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:56:22,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:56:22,964 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:56:22,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:56:22,965 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:56:22,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:56:22,968 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:56:22,968 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:56:22,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:56:22,969 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:56:22,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:56:22,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:56:22,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:56:22,971 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:56:22,972 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:56:22,973 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:56:22,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:56:22,973 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:56:22,974 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:56:22,974 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:56:22,975 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:56:22,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:56:22,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:56:22,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:56:22,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:56:22,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:22,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:56:22,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:56:22,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:56:22,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:56:22,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:56:22,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:56:22,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:56:22,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:56:22,981 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_71e66628-a545-460d-9e59-ffac6d0552a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 [2023-11-24 21:56:23,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:56:23,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:56:23,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:56:23,284 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:56:23,284 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:56:23,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-24 21:56:26,600 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:56:26,907 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:56:26,908 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-24 21:56:26,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/data/769bab054/89b04116707142c7a2e22f3675bf91d7/FLAG5015863ae [2023-11-24 21:56:26,933 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/data/769bab054/89b04116707142c7a2e22f3675bf91d7 [2023-11-24 21:56:26,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:56:26,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:56:26,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:26,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:56:26,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:56:26,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:26" (1/1) ... [2023-11-24 21:56:26,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620d1a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:26, skipping insertion in model container [2023-11-24 21:56:26,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:26" (1/1) ... [2023-11-24 21:56:26,997 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:56:27,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:27,249 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:56:27,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:27,317 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:56:27,317 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:56:27,326 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:56:27,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27 WrapperNode [2023-11-24 21:56:27,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:27,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:27,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:56:27,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:56:27,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,393 INFO L138 Inliner]: procedures = 23, calls = 177, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 410 [2023-11-24 21:56:27,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:27,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:56:27,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:56:27,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:56:27,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,414 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,436 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:56:27,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,473 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,481 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:56:27,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:56:27,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:56:27,482 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:56:27,483 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (1/1) ... [2023-11-24 21:56:27,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:27,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:56:27,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71e66628-a545-460d-9e59-ffac6d0552a6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:56:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:56:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:56:27,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:56:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:56:27,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:56:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:56:27,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:56:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:56:27,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:56:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:56:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:56:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:56:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:56:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:56:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:56:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:56:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:56:27,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:56:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:56:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:56:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:56:27,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:56:27,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:56:27,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:56:27,585 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 21:56:27,778 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:56:27,781 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:56:28,508 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:56:29,032 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:56:29,032 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:56:29,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:29 BoogieIcfgContainer [2023-11-24 21:56:29,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:56:29,037 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:56:29,037 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:56:29,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:56:29,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:56:26" (1/3) ... [2023-11-24 21:56:29,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4eafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:29, skipping insertion in model container [2023-11-24 21:56:29,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:27" (2/3) ... [2023-11-24 21:56:29,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4eafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:29, skipping insertion in model container [2023-11-24 21:56:29,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:29" (3/3) ... [2023-11-24 21:56:29,048 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2023-11-24 21:56:29,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:56:29,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:56:29,068 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:56:29,173 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:56:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 117 transitions, 262 flow [2023-11-24 21:56:29,333 INFO L124 PetriNetUnfolderBase]: 0/113 cut-off events. [2023-11-24 21:56:29,333 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:56:29,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 113 events. 0/113 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 280 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-24 21:56:29,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 117 transitions, 262 flow [2023-11-24 21:56:29,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 112 transitions, 248 flow [2023-11-24 21:56:29,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:56:29,363 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;@5bee3e11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:56:29,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 21:56:29,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:56:29,368 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:56:29,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:56:29,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:29,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:56:29,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:56:29,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash 27739, now seen corresponding path program 1 times [2023-11-24 21:56:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152509181] [2023-11-24 21:56:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:29,998 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 21:56:29,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152509181] [2023-11-24 21:56:30,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152509181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:30,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:30,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013820984] [2023-11-24 21:56:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:30,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:30,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2023-11-24 21:56:30,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 21:56:30,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:30,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2023-11-24 21:56:30,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:43,750 INFO L124 PetriNetUnfolderBase]: 69712/107986 cut-off events. [2023-11-24 21:56:43,750 INFO L125 PetriNetUnfolderBase]: For 3207/3207 co-relation queries the response was YES. [2023-11-24 21:56:44,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202308 conditions, 107986 events. 69712/107986 cut-off events. For 3207/3207 co-relation queries the response was YES. Maximal size of possible extension queue 3706. Compared 939947 event pairs, 69712 based on Foata normal form. 1/103698 useless extension candidates. Maximal degree in co-relation 192362. Up to 91856 conditions per place. [2023-11-24 21:56:44,935 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 47 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-11-24 21:56:44,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 108 transitions, 336 flow [2023-11-24 21:56:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-24 21:56:44,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2023-11-24 21:56:44,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-24 21:56:44,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-24 21:56:44,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:44,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-24 21:56:44,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 21:56:44,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:56:44,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:56:44,973 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 248 flow. Second operand 3 states and 246 transitions. [2023-11-24 21:56:44,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 108 transitions, 336 flow [2023-11-24 21:56:45,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 108 transitions, 320 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:56:45,078 INFO L231 Difference]: Finished difference. Result has 115 places, 108 transitions, 226 flow [2023-11-24 21:56:45,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2023-11-24 21:56:45,085 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, -10 predicate places. [2023-11-24 21:56:45,086 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 226 flow [2023-11-24 21:56:45,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 21:56:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:56:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:56:45,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:56:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 27740, now seen corresponding path program 1 times [2023-11-24 21:56:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789009168] [2023-11-24 21:56:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:45,365 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 21:56:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789009168] [2023-11-24 21:56:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789009168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:45,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:45,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7170042] [2023-11-24 21:56:45,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:45,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:45,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 117 [2023-11-24 21:56:45,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 21:56:45,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:45,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 117 [2023-11-24 21:56:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:53,023 INFO L124 PetriNetUnfolderBase]: 46384/74262 cut-off events. [2023-11-24 21:56:53,023 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-11-24 21:56:53,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137052 conditions, 74262 events. 46384/74262 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 2544. Compared 645808 event pairs, 46384 based on Foata normal form. 6562/77214 useless extension candidates. Maximal degree in co-relation 137046. Up to 61966 conditions per place. [2023-11-24 21:56:53,426 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 45 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-11-24 21:56:53,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 106 transitions, 314 flow [2023-11-24 21:56:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-24 21:56:53,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2023-11-24 21:56:53,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-24 21:56:53,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-24 21:56:53,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:53,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-24 21:56:53,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 21:56:53,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:56:53,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:56:53,452 INFO L175 Difference]: Start difference. First operand has 115 places, 108 transitions, 226 flow. Second operand 3 states and 249 transitions. [2023-11-24 21:56:53,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 106 transitions, 314 flow [2023-11-24 21:56:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 106 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:56:53,457 INFO L231 Difference]: Finished difference. Result has 114 places, 106 transitions, 223 flow [2023-11-24 21:56:53,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=114, PETRI_TRANSITIONS=106} [2023-11-24 21:56:53,458 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, -11 predicate places. [2023-11-24 21:56:53,459 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 106 transitions, 223 flow [2023-11-24 21:56:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 21:56:53,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:53,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:53,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:56:53,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:56:53,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 827327823, now seen corresponding path program 1 times [2023-11-24 21:56:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:53,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534951933] [2023-11-24 21:56:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:53,618 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 21:56:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:53,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534951933] [2023-11-24 21:56:53,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534951933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:53,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:53,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891489366] [2023-11-24 21:56:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:53,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2023-11-24 21:56:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 106 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 21:56:53,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:53,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2023-11-24 21:56:53,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:00,863 INFO L124 PetriNetUnfolderBase]: 48336/75491 cut-off events. [2023-11-24 21:57:00,863 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-24 21:57:00,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140972 conditions, 75491 events. 48336/75491 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 2571. Compared 637894 event pairs, 48336 based on Foata normal form. 0/73344 useless extension candidates. Maximal degree in co-relation 140965. Up to 64656 conditions per place. [2023-11-24 21:57:01,369 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 47 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-11-24 21:57:01,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 315 flow [2023-11-24 21:57:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-24 21:57:01,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.698005698005698 [2023-11-24 21:57:01,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-24 21:57:01,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-24 21:57:01,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:01,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-24 21:57:01,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 21:57:01,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:57:01,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:57:01,379 INFO L175 Difference]: Start difference. First operand has 114 places, 106 transitions, 223 flow. Second operand 3 states and 245 transitions. [2023-11-24 21:57:01,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 315 flow [2023-11-24 21:57:01,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:01,386 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 220 flow [2023-11-24 21:57:01,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2023-11-24 21:57:01,389 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, -12 predicate places. [2023-11-24 21:57:01,389 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 220 flow [2023-11-24 21:57:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 21:57:01,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:01,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:57:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:57:01,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:57:01,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 827327824, now seen corresponding path program 1 times [2023-11-24 21:57:01,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:01,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447279256] [2023-11-24 21:57:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:01,596 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 21:57:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:01,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447279256] [2023-11-24 21:57:01,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447279256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:01,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:01,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:57:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341143539] [2023-11-24 21:57:01,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2023-11-24 21:57:01,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 21:57:01,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2023-11-24 21:57:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:09,424 INFO L124 PetriNetUnfolderBase]: 48336/74759 cut-off events. [2023-11-24 21:57:09,424 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-24 21:57:09,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140241 conditions, 74759 events. 48336/74759 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 2564. Compared 623531 event pairs, 48336 based on Foata normal form. 0/72612 useless extension candidates. Maximal degree in co-relation 140233. Up to 64656 conditions per place. [2023-11-24 21:57:09,866 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 47 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-11-24 21:57:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 102 transitions, 312 flow [2023-11-24 21:57:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-24 21:57:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.698005698005698 [2023-11-24 21:57:09,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-24 21:57:09,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-24 21:57:09,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:09,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-24 21:57:09,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 21:57:09,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:57:09,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 21:57:09,873 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 220 flow. Second operand 3 states and 245 transitions. [2023-11-24 21:57:09,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 102 transitions, 312 flow [2023-11-24 21:57:09,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 102 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:09,877 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 217 flow [2023-11-24 21:57:09,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2023-11-24 21:57:09,878 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, -13 predicate places. [2023-11-24 21:57:09,878 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 217 flow [2023-11-24 21:57:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 21:57:09,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:09,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:09,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:57:09,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:57:09,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1893177183, now seen corresponding path program 1 times [2023-11-24 21:57:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40789141] [2023-11-24 21:57:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:09,953 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 21:57:09,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40789141] [2023-11-24 21:57:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40789141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:09,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:09,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:57:09,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801904454] [2023-11-24 21:57:09,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:09,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:09,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:09,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:09,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2023-11-24 21:57:09,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 21:57:09,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:09,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2023-11-24 21:57:09,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand