./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:13:21,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:13:21,889 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:13:21,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:13:21,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:13:21,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:13:21,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:13:21,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:13:21,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:13:21,938 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:13:21,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:13:21,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:13:21,940 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:13:21,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:13:21,941 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:13:21,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:13:21,942 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:13:21,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:13:21,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:13:21,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:13:21,943 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:13:21,944 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:13:21,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:13:21,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:13:21,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:13:21,947 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:13:21,947 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:13:21,950 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:13:21,950 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:13:21,951 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:13:21,951 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:13:21,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:13:21,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:13:21,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:21,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:13:21,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:13:21,953 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:13:21,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:13:21,958 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:13:21,958 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:13:21,958 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:13:21,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:13:21,959 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_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 [2024-10-31 22:13:22,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:13:22,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:13:22,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:13:22,342 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:13:22,343 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:13:22,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c Unable to find full path for "g++" [2024-10-31 22:13:24,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:13:24,691 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:13:24,692 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2024-10-31 22:13:24,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/data/1b92222eb/30716856bfa74b3f911c0f32d2191d27/FLAG7ed0e5445 [2024-10-31 22:13:25,057 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/data/1b92222eb/30716856bfa74b3f911c0f32d2191d27 [2024-10-31 22:13:25,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:13:25,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:13:25,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:25,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:13:25,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:13:25,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420f1267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25, skipping insertion in model container [2024-10-31 22:13:25,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,105 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:13:25,330 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:13:25,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:25,352 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:13:25,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:25,416 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:13:25,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25 WrapperNode [2024-10-31 22:13:25,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:25,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:25,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:13:25,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:13:25,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,536 INFO L138 Inliner]: procedures = 24, calls = 75, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 230 [2024-10-31 22:13:25,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:25,540 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:25,540 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:25,541 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:25,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,574 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:13:25,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:25,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:25,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:25,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:25,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (1/1) ... [2024-10-31 22:13:25,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:25,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:25,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:13:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:13:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:13:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:13:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:13:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:13:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:13:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:13:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:13:25,689 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:13:25,870 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:25,874 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:13:26,374 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:13:26,375 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:13:26,807 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:13:26,808 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:13:26,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:26 BoogieIcfgContainer [2024-10-31 22:13:26,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:13:26,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:13:26,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:13:26,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:13:26,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:13:25" (1/3) ... [2024-10-31 22:13:26,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1079724b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:26, skipping insertion in model container [2024-10-31 22:13:26,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:25" (2/3) ... [2024-10-31 22:13:26,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1079724b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:26, skipping insertion in model container [2024-10-31 22:13:26,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:26" (3/3) ... [2024-10-31 22:13:26,820 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-10-31 22:13:26,843 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:13:26,844 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-31 22:13:26,844 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:13:26,921 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:13:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 60 transitions, 141 flow [2024-10-31 22:13:27,016 INFO L124 PetriNetUnfolderBase]: 1/57 cut-off events. [2024-10-31 22:13:27,017 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:13:27,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 1/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 104 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-10-31 22:13:27,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 60 transitions, 141 flow [2024-10-31 22:13:27,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 130 flow [2024-10-31 22:13:27,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:13:27,060 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e842864, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:13:27,060 INFO L334 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-10-31 22:13:27,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:13:27,067 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:13:27,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:13:27,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:27,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:13:27,073 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:27,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 575494, now seen corresponding path program 1 times [2024-10-31 22:13:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282240261] [2024-10-31 22:13:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:27,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282240261] [2024-10-31 22:13:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282240261] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:27,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:27,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:13:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372057279] [2024-10-31 22:13:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:27,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:27,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:27,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:27,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:27,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:28,588 INFO L124 PetriNetUnfolderBase]: 2839/4666 cut-off events. [2024-10-31 22:13:28,589 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-31 22:13:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9120 conditions, 4666 events. 2839/4666 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31799 event pairs, 2838 based on Foata normal form. 1/3386 useless extension candidates. Maximal degree in co-relation 8583. Up to 4219 conditions per place. [2024-10-31 22:13:28,671 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-31 22:13:28,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 196 flow [2024-10-31 22:13:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-31 22:13:28,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-10-31 22:13:28,711 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 130 flow. Second operand 3 states and 101 transitions. [2024-10-31 22:13:28,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 196 flow [2024-10-31 22:13:28,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:13:28,732 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 116 flow [2024-10-31 22:13:28,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-10-31 22:13:28,741 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -7 predicate places. [2024-10-31 22:13:28,741 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 116 flow [2024-10-31 22:13:28,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:28,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:28,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:13:28,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:13:28,744 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:28,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash 575495, now seen corresponding path program 1 times [2024-10-31 22:13:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530402667] [2024-10-31 22:13:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:29,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530402667] [2024-10-31 22:13:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530402667] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:29,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715124759] [2024-10-31 22:13:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:29,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:29,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:29,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:29,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:29,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:29,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:29,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:30,190 INFO L124 PetriNetUnfolderBase]: 2840/4669 cut-off events. [2024-10-31 22:13:30,190 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-31 22:13:30,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8973 conditions, 4669 events. 2840/4669 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31861 event pairs, 2838 based on Foata normal form. 0/3388 useless extension candidates. Maximal degree in co-relation 8951. Up to 4224 conditions per place. [2024-10-31 22:13:30,226 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 36 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-10-31 22:13:30,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 204 flow [2024-10-31 22:13:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-31 22:13:30,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-31 22:13:30,231 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 116 flow. Second operand 4 states and 125 transitions. [2024-10-31 22:13:30,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 204 flow [2024-10-31 22:13:30,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:30,235 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 139 flow [2024-10-31 22:13:30,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-10-31 22:13:30,236 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2024-10-31 22:13:30,237 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 139 flow [2024-10-31 22:13:30,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:30,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:30,237 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:13:30,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:13:30,238 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:30,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 553068810, now seen corresponding path program 1 times [2024-10-31 22:13:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:30,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743828809] [2024-10-31 22:13:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:30,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743828809] [2024-10-31 22:13:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743828809] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962536199] [2024-10-31 22:13:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:30,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:30,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:30,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:13:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:30,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:13:30,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:30,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:13:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:31,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:31,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962536199] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:31,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:31,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:13:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438938813] [2024-10-31 22:13:31,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:31,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:13:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:13:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:13:31,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:31,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 139 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 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) [2024-10-31 22:13:31,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:31,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:32,337 INFO L124 PetriNetUnfolderBase]: 2840/4668 cut-off events. [2024-10-31 22:13:32,337 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-31 22:13:32,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8980 conditions, 4668 events. 2840/4668 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31873 event pairs, 2838 based on Foata normal form. 0/3387 useless extension candidates. Maximal degree in co-relation 8958. Up to 4220 conditions per place. [2024-10-31 22:13:32,370 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 32 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-10-31 22:13:32,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 213 flow [2024-10-31 22:13:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:13:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:13:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-10-31 22:13:32,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-10-31 22:13:32,372 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 139 flow. Second operand 6 states and 166 transitions. [2024-10-31 22:13:32,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 213 flow [2024-10-31 22:13:32,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:32,375 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 146 flow [2024-10-31 22:13:32,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-10-31 22:13:32,376 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2024-10-31 22:13:32,376 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 146 flow [2024-10-31 22:13:32,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 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) [2024-10-31 22:13:32,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:32,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:32,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:13:32,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:32,581 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:32,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -22730823, now seen corresponding path program 1 times [2024-10-31 22:13:32,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:32,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026727962] [2024-10-31 22:13:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:32,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:32,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026727962] [2024-10-31 22:13:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026727962] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:32,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106090076] [2024-10-31 22:13:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:32,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:32,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:32,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:32,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:32,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:32,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:33,224 INFO L124 PetriNetUnfolderBase]: 1694/2867 cut-off events. [2024-10-31 22:13:33,224 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:13:33,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 2867 events. 1694/2867 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18246 event pairs, 1692 based on Foata normal form. 0/2363 useless extension candidates. Maximal degree in co-relation 5473. Up to 2550 conditions per place. [2024-10-31 22:13:33,253 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 32 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-10-31 22:13:33,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 208 flow [2024-10-31 22:13:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-10-31 22:13:33,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:13:33,257 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 146 flow. Second operand 4 states and 120 transitions. [2024-10-31 22:13:33,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 208 flow [2024-10-31 22:13:33,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 178 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:13:33,263 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 114 flow [2024-10-31 22:13:33,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-10-31 22:13:33,265 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2024-10-31 22:13:33,265 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 114 flow [2024-10-31 22:13:33,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:33,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:33,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:33,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:13:33,267 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:33,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash -22730822, now seen corresponding path program 1 times [2024-10-31 22:13:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:33,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138994823] [2024-10-31 22:13:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:33,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:33,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138994823] [2024-10-31 22:13:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138994823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:33,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518466023] [2024-10-31 22:13:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:33,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:33,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:13:33,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:33,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:33,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:13:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:34,027 INFO L124 PetriNetUnfolderBase]: 1693/2866 cut-off events. [2024-10-31 22:13:34,027 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:13:34,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5482 conditions, 2866 events. 1693/2866 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18191 event pairs, 1692 based on Foata normal form. 1/2364 useless extension candidates. Maximal degree in co-relation 5465. Up to 2553 conditions per place. [2024-10-31 22:13:34,050 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 32 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-10-31 22:13:34,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 178 flow [2024-10-31 22:13:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-31 22:13:34,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-10-31 22:13:34,052 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 114 flow. Second operand 3 states and 101 transitions. [2024-10-31 22:13:34,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 178 flow [2024-10-31 22:13:34,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:34,055 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 111 flow [2024-10-31 22:13:34,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-10-31 22:13:34,056 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2024-10-31 22:13:34,057 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 111 flow [2024-10-31 22:13:34,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:34,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:34,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:34,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:13:34,058 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:34,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 272202365, now seen corresponding path program 1 times [2024-10-31 22:13:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380559671] [2024-10-31 22:13:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:34,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380559671] [2024-10-31 22:13:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380559671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471532120] [2024-10-31 22:13:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:34,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:13:34,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:13:34,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:34,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:13:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:34,918 INFO L124 PetriNetUnfolderBase]: 1462/2317 cut-off events. [2024-10-31 22:13:34,918 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-31 22:13:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4597 conditions, 2317 events. 1462/2317 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13815 event pairs, 306 based on Foata normal form. 0/1971 useless extension candidates. Maximal degree in co-relation 4586. Up to 1688 conditions per place. [2024-10-31 22:13:34,934 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 45 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-10-31 22:13:34,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 237 flow [2024-10-31 22:13:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-31 22:13:34,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-31 22:13:34,941 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 111 flow. Second operand 4 states and 135 transitions. [2024-10-31 22:13:34,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 237 flow [2024-10-31 22:13:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:34,945 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 111 flow [2024-10-31 22:13:34,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-10-31 22:13:34,947 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2024-10-31 22:13:34,947 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 111 flow [2024-10-31 22:13:34,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:34,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:34,950 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:34,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:13:34,950 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:34,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash -406511648, now seen corresponding path program 1 times [2024-10-31 22:13:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220123862] [2024-10-31 22:13:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:35,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:35,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220123862] [2024-10-31 22:13:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220123862] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131704697] [2024-10-31 22:13:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:35,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:35,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:35,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:13:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:35,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:35,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:35,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:35,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-10-31 22:13:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131704697] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:36,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:36,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-31 22:13:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130490525] [2024-10-31 22:13:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:36,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:13:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:13:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:13:36,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:13:36,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 111 flow. Second operand has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:36,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:36,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:13:36,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:37,344 INFO L124 PetriNetUnfolderBase]: 2692/4498 cut-off events. [2024-10-31 22:13:37,344 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-10-31 22:13:37,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 4498 events. 2692/4498 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30226 event pairs, 1664 based on Foata normal form. 0/3963 useless extension candidates. Maximal degree in co-relation 4849. Up to 2215 conditions per place. [2024-10-31 22:13:37,376 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 79 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2024-10-31 22:13:37,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 426 flow [2024-10-31 22:13:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:13:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:13:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 268 transitions. [2024-10-31 22:13:37,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-10-31 22:13:37,378 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 111 flow. Second operand 8 states and 268 transitions. [2024-10-31 22:13:37,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 426 flow [2024-10-31 22:13:37,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 107 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:13:37,382 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 184 flow [2024-10-31 22:13:37,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-10-31 22:13:37,384 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2024-10-31 22:13:37,384 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 184 flow [2024-10-31 22:13:37,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:37,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:37,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:37,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:13:37,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1479f33-b35b-4158-b90a-d2366f8236a6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:13:37,587 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:37,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash 330667663, now seen corresponding path program 1 times [2024-10-31 22:13:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:37,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009960637] [2024-10-31 22:13:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:37,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009960637] [2024-10-31 22:13:37,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009960637] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:37,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:37,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:37,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896667642] [2024-10-31 22:13:37,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:37,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:37,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:37,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:37,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:13:37,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:37,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:37,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:37,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:37,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:38,865 INFO L124 PetriNetUnfolderBase]: 3427/5748 cut-off events. [2024-10-31 22:13:38,865 INFO L125 PetriNetUnfolderBase]: For 1887/1887 co-relation queries the response was YES. [2024-10-31 22:13:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13071 conditions, 5748 events. 3427/5748 cut-off events. For 1887/1887 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 38603 event pairs, 1007 based on Foata normal form. 186/5706 useless extension candidates. Maximal degree in co-relation 6821. Up to 2138 conditions per place. [2024-10-31 22:13:38,914 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 91 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-10-31 22:13:38,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 116 transitions, 578 flow [2024-10-31 22:13:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:13:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:13:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-10-31 22:13:38,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-10-31 22:13:38,916 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 184 flow. Second operand 6 states and 209 transitions. [2024-10-31 22:13:38,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 116 transitions, 578 flow [2024-10-31 22:13:38,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:38,927 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 246 flow [2024-10-31 22:13:38,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-10-31 22:13:38,928 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2024-10-31 22:13:38,929 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 246 flow [2024-10-31 22:13:38,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:38,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:38,929 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:38,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:13:38,931 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:38,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:38,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1650697949, now seen corresponding path program 2 times [2024-10-31 22:13:38,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:38,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394410830] [2024-10-31 22:13:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:13:39,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:39,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394410830] [2024-10-31 22:13:39,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394410830] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:39,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:39,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:39,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404891812] [2024-10-31 22:13:39,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:39,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:13:39,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:13:39,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:39,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:39,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:13:39,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:40,122 INFO L124 PetriNetUnfolderBase]: 2797/4744 cut-off events. [2024-10-31 22:13:40,123 INFO L125 PetriNetUnfolderBase]: For 3509/3645 co-relation queries the response was YES. [2024-10-31 22:13:40,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11648 conditions, 4744 events. 2797/4744 cut-off events. For 3509/3645 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32457 event pairs, 1054 based on Foata normal form. 136/4768 useless extension candidates. Maximal degree in co-relation 6019. Up to 2354 conditions per place. [2024-10-31 22:13:40,165 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 53 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-10-31 22:13:40,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 435 flow [2024-10-31 22:13:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:13:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:13:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-10-31 22:13:40,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-10-31 22:13:40,168 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 246 flow. Second operand 5 states and 156 transitions. [2024-10-31 22:13:40,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 435 flow [2024-10-31 22:13:40,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:40,183 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 256 flow [2024-10-31 22:13:40,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-10-31 22:13:40,184 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2024-10-31 22:13:40,185 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 256 flow [2024-10-31 22:13:40,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:40,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:40,186 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:40,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:13:40,187 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:40,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1461541793, now seen corresponding path program 1 times [2024-10-31 22:13:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:40,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739653693] [2024-10-31 22:13:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:40,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739653693] [2024-10-31 22:13:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739653693] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:40,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:40,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469399227] [2024-10-31 22:13:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:40,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:13:40,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:13:40,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:40,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:40,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:13:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:41,488 INFO L124 PetriNetUnfolderBase]: 3503/6021 cut-off events. [2024-10-31 22:13:41,488 INFO L125 PetriNetUnfolderBase]: For 5997/6125 co-relation queries the response was YES. [2024-10-31 22:13:41,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15483 conditions, 6021 events. 3503/6021 cut-off events. For 5997/6125 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 41650 event pairs, 1027 based on Foata normal form. 282/6193 useless extension candidates. Maximal degree in co-relation 7990. Up to 2716 conditions per place. [2024-10-31 22:13:41,536 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 83 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2024-10-31 22:13:41,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 653 flow [2024-10-31 22:13:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:13:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:13:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-10-31 22:13:41,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-10-31 22:13:41,538 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 256 flow. Second operand 6 states and 201 transitions. [2024-10-31 22:13:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 653 flow [2024-10-31 22:13:41,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 111 transitions, 599 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:41,551 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 304 flow [2024-10-31 22:13:41,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-10-31 22:13:41,552 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2024-10-31 22:13:41,552 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 304 flow [2024-10-31 22:13:41,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:41,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:41,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:41,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:13:41,554 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:41,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1346664402, now seen corresponding path program 1 times [2024-10-31 22:13:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024947127] [2024-10-31 22:13:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:41,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:41,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024947127] [2024-10-31 22:13:41,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024947127] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:41,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:41,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:13:41,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541941455] [2024-10-31 22:13:41,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:41,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:41,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:41,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:41,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-10-31 22:13:41,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:41,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:41,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-10-31 22:13:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:43,861 INFO L124 PetriNetUnfolderBase]: 12287/19811 cut-off events. [2024-10-31 22:13:43,862 INFO L125 PetriNetUnfolderBase]: For 15605/15917 co-relation queries the response was YES. [2024-10-31 22:13:43,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49920 conditions, 19811 events. 12287/19811 cut-off events. For 15605/15917 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 144207 event pairs, 2605 based on Foata normal form. 432/20113 useless extension candidates. Maximal degree in co-relation 25803. Up to 5325 conditions per place. [2024-10-31 22:13:44,024 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 193 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-10-31 22:13:44,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 221 transitions, 1402 flow [2024-10-31 22:13:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:13:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:13:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 295 transitions. [2024-10-31 22:13:44,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-10-31 22:13:44,026 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 304 flow. Second operand 9 states and 295 transitions. [2024-10-31 22:13:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 221 transitions, 1402 flow [2024-10-31 22:13:44,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 221 transitions, 1388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:44,187 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 394 flow [2024-10-31 22:13:44,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2024-10-31 22:13:44,188 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2024-10-31 22:13:44,188 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 394 flow [2024-10-31 22:13:44,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:44,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:44,189 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:44,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:13:44,191 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:44,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash -343459692, now seen corresponding path program 2 times [2024-10-31 22:13:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:44,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236528430] [2024-10-31 22:13:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:44,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236528430] [2024-10-31 22:13:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236528430] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:44,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032266416] [2024-10-31 22:13:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:44,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:44,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-31 22:13:44,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:44,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:44,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-31 22:13:44,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:46,413 INFO L124 PetriNetUnfolderBase]: 8756/15223 cut-off events. [2024-10-31 22:13:46,413 INFO L125 PetriNetUnfolderBase]: For 14428/14800 co-relation queries the response was YES. [2024-10-31 22:13:46,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39743 conditions, 15223 events. 8756/15223 cut-off events. For 14428/14800 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 120132 event pairs, 7311 based on Foata normal form. 444/15181 useless extension candidates. Maximal degree in co-relation 20651. Up to 12316 conditions per place. [2024-10-31 22:13:46,528 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 64 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-31 22:13:46,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 96 transitions, 602 flow [2024-10-31 22:13:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-10-31 22:13:46,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-31 22:13:46,529 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 394 flow. Second operand 3 states and 105 transitions. [2024-10-31 22:13:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 96 transitions, 602 flow [2024-10-31 22:13:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 602 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:13:46,667 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 402 flow [2024-10-31 22:13:46,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-10-31 22:13:46,668 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2024-10-31 22:13:46,668 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 402 flow [2024-10-31 22:13:46,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:46,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:46,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:46,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:13:46,670 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:46,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 91862002, now seen corresponding path program 3 times [2024-10-31 22:13:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159801300] [2024-10-31 22:13:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159801300] [2024-10-31 22:13:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159801300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:46,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:13:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179253191] [2024-10-31 22:13:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:46,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:46,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-10-31 22:13:46,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:46,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:46,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-10-31 22:13:46,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:51,015 INFO L124 PetriNetUnfolderBase]: 18215/29227 cut-off events. [2024-10-31 22:13:51,015 INFO L125 PetriNetUnfolderBase]: For 29709/30001 co-relation queries the response was YES. [2024-10-31 22:13:51,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81265 conditions, 29227 events. 18215/29227 cut-off events. For 29709/30001 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 221413 event pairs, 3874 based on Foata normal form. 396/29271 useless extension candidates. Maximal degree in co-relation 41915. Up to 18235 conditions per place. [2024-10-31 22:13:51,235 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 213 selfloop transitions, 18 changer transitions 0/243 dead transitions. [2024-10-31 22:13:51,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 243 transitions, 1606 flow [2024-10-31 22:13:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:13:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:13:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 335 transitions. [2024-10-31 22:13:51,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-31 22:13:51,238 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 402 flow. Second operand 11 states and 335 transitions. [2024-10-31 22:13:51,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 243 transitions, 1606 flow [2024-10-31 22:13:51,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 243 transitions, 1602 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:51,716 INFO L231 Difference]: Finished difference. Result has 105 places, 94 transitions, 560 flow [2024-10-31 22:13:51,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=560, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2024-10-31 22:13:51,718 INFO L277 CegarLoopForPetriNet]: 65 programPoint places, 40 predicate places. [2024-10-31 22:13:51,718 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 560 flow [2024-10-31 22:13:51,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:51,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:51,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:51,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:13:51,719 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-10-31 22:13:51,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1994928760, now seen corresponding path program 4 times [2024-10-31 22:13:51,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:51,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834642939] [2024-10-31 22:13:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:51,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms