./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB --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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:08:13,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:08:13,410 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:08:13,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:08:13,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:08:13,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:08:13,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:08:13,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:08:13,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:08:13,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:08:13,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:08:13,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:08:13,457 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:08:13,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:08:13,457 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:08:13,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:08:13,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:08:13,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:08:13,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:08:13,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:08:13,459 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:08:13,459 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:08:13,459 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:08:13,460 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:08:13,460 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:08:13,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:08:13,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:08:13,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:08:13,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:08:13,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:08:13,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:08:13,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:08:13,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:08:13,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:08:13,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:08:13,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:08:13,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:08:13,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:08:13,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:08:13,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:08:13,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:08:13,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:08:13,464 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-11-28 04:08:13,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:08:13,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:08:13,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:08:13,795 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:08:13,795 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:08:13,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-28 04:08:16,768 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/data/19a73f477/b203d85f8e034850bba8240cabf5c1e5/FLAGc29e7e062 [2024-11-28 04:08:17,064 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:08:17,064 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-28 04:08:17,076 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/data/19a73f477/b203d85f8e034850bba8240cabf5c1e5/FLAGc29e7e062 [2024-11-28 04:08:17,097 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/data/19a73f477/b203d85f8e034850bba8240cabf5c1e5 [2024-11-28 04:08:17,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:08:17,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:08:17,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:08:17,104 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:08:17,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:08:17,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e84d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17, skipping insertion in model container [2024-11-28 04:08:17,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:08:17,367 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:08:17,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:08:17,389 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:08:17,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:08:17,455 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:08:17,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17 WrapperNode [2024-11-28 04:08:17,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:08:17,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:08:17,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:08:17,458 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:08:17,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,519 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-28 04:08:17,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:08:17,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:08:17,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:08:17,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:08:17,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,540 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,572 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 04:08:17,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,585 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:08:17,606 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:08:17,606 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:08:17,606 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:08:17,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (1/1) ... [2024-11-28 04:08:17,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:08:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:17,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:08:17,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:08:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:08:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:08:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:08:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:08:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:08:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:08:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:08:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:08:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:08:17,691 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:08:17,800 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:08:17,802 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:08:18,405 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:08:18,407 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:08:19,022 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:08:19,023 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 04:08:19,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:08:19 BoogieIcfgContainer [2024-11-28 04:08:19,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:08:19,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:08:19,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:08:19,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:08:19,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:08:17" (1/3) ... [2024-11-28 04:08:19,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f1920a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:08:19, skipping insertion in model container [2024-11-28 04:08:19,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:08:17" (2/3) ... [2024-11-28 04:08:19,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f1920a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:08:19, skipping insertion in model container [2024-11-28 04:08:19,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:08:19" (3/3) ... [2024-11-28 04:08:19,040 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-11-28 04:08:19,062 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:08:19,064 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum2.wvr.c that has 4 procedures, 51 locations, 1 initial locations, 5 loop locations, and 18 error locations. [2024-11-28 04:08:19,064 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:08:19,185 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 04:08:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 131 flow [2024-11-28 04:08:19,281 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2024-11-28 04:08:19,286 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:08:19,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 5/52 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-11-28 04:08:19,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 131 flow [2024-11-28 04:08:19,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 51 transitions, 120 flow [2024-11-28 04:08:19,311 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:08:19,328 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;@52a394ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:08:19,328 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-28 04:08:19,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:08:19,333 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 04:08:19,333 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:08:19,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:19,333 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:08:19,334 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:19,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 910290, now seen corresponding path program 1 times [2024-11-28 04:08:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:19,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478535099] [2024-11-28 04:08:19,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:19,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478535099] [2024-11-28 04:08:19,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478535099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:19,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:19,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:08:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414939351] [2024-11-28 04:08:19,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:19,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:08:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:19,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:08:19,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:08:19,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:19,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:19,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:19,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:20,905 INFO L124 PetriNetUnfolderBase]: 2971/4367 cut-off events. [2024-11-28 04:08:20,906 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-11-28 04:08:20,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 4367 events. 2971/4367 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26147 event pairs, 2534 based on Foata normal form. 1/2617 useless extension candidates. Maximal degree in co-relation 8290. Up to 4213 conditions per place. [2024-11-28 04:08:20,965 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-28 04:08:20,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 194 flow [2024-11-28 04:08:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:08:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:08:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-28 04:08:20,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-11-28 04:08:20,986 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 120 flow. Second operand 3 states and 74 transitions. [2024-11-28 04:08:20,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 194 flow [2024-11-28 04:08:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:08:21,007 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 104 flow [2024-11-28 04:08:21,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-28 04:08:21,017 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-11-28 04:08:21,017 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 104 flow [2024-11-28 04:08:21,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:21,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:21,018 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:08:21,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:08:21,019 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:21,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash 910291, now seen corresponding path program 1 times [2024-11-28 04:08:21,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:21,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88378445] [2024-11-28 04:08:21,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88378445] [2024-11-28 04:08:21,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88378445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:21,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:08:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479133748] [2024-11-28 04:08:21,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:21,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:08:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:21,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:08:21,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:08:21,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:21,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:21,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:21,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:21,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:22,268 INFO L124 PetriNetUnfolderBase]: 2971/4366 cut-off events. [2024-11-28 04:08:22,269 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 04:08:22,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8663 conditions, 4366 events. 2971/4366 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26177 event pairs, 2534 based on Foata normal form. 0/2615 useless extension candidates. Maximal degree in co-relation 8642. Up to 4217 conditions per place. [2024-11-28 04:08:22,306 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-28 04:08:22,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 186 flow [2024-11-28 04:08:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:08:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:08:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-28 04:08:22,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-11-28 04:08:22,308 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 104 flow. Second operand 4 states and 83 transitions. [2024-11-28 04:08:22,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 186 flow [2024-11-28 04:08:22,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:22,312 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2024-11-28 04:08:22,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-28 04:08:22,312 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-11-28 04:08:22,312 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2024-11-28 04:08:22,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:22,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:22,313 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 04:08:22,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:08:22,313 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:22,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 28221618, now seen corresponding path program 1 times [2024-11-28 04:08:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368483404] [2024-11-28 04:08:22,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:22,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368483404] [2024-11-28 04:08:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368483404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:22,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:08:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677152524] [2024-11-28 04:08:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:22,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:08:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:22,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:08:22,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:08:22,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:08:22,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:22,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:08:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:23,194 INFO L124 PetriNetUnfolderBase]: 2971/4372 cut-off events. [2024-11-28 04:08:23,194 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 04:08:23,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 4372 events. 2971/4372 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26270 event pairs, 2534 based on Foata normal form. 1/2621 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-11-28 04:08:23,229 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 41 selfloop transitions, 4 changer transitions 1/51 dead transitions. [2024-11-28 04:08:23,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 214 flow [2024-11-28 04:08:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:08:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:08:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-28 04:08:23,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-28 04:08:23,232 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 4 states and 97 transitions. [2024-11-28 04:08:23,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 214 flow [2024-11-28 04:08:23,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:08:23,237 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 124 flow [2024-11-28 04:08:23,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-28 04:08:23,239 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-11-28 04:08:23,240 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 124 flow [2024-11-28 04:08:23,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:23,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:23,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 04:08:23,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:08:23,241 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:23,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1349578676, now seen corresponding path program 1 times [2024-11-28 04:08:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675203951] [2024-11-28 04:08:23,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675203951] [2024-11-28 04:08:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675203951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128376678] [2024-11-28 04:08:23,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:23,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:23,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:23,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:08:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:23,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:08:23,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:23,800 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 8 treesize of output 1 [2024-11-28 04:08:23,998 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:08:23,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-28 04:08:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:24,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:08:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128376678] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:08:24,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-28 04:08:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936113020] [2024-11-28 04:08:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:24,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:08:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:24,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:08:24,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:08:24,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:24,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:24,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:24,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:24,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:24,870 INFO L124 PetriNetUnfolderBase]: 2971/4370 cut-off events. [2024-11-28 04:08:24,870 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 04:08:24,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 4370 events. 2971/4370 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26211 event pairs, 2534 based on Foata normal form. 1/2622 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-11-28 04:08:24,904 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-28 04:08:24,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 222 flow [2024-11-28 04:08:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:08:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:08:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-28 04:08:24,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-11-28 04:08:24,909 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 124 flow. Second operand 5 states and 97 transitions. [2024-11-28 04:08:24,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 222 flow [2024-11-28 04:08:24,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 212 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:24,912 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 128 flow [2024-11-28 04:08:24,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-28 04:08:24,913 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-11-28 04:08:24,913 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 128 flow [2024-11-28 04:08:24,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:24,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:24,913 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:24,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:08:25,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:25,118 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:25,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash -134986034, now seen corresponding path program 1 times [2024-11-28 04:08:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:25,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701723375] [2024-11-28 04:08:25,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:25,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:25,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701723375] [2024-11-28 04:08:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701723375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:25,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747956071] [2024-11-28 04:08:25,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:25,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:25,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:08:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:25,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:08:25,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:25,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:25,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747956071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:25,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:25,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 04:08:25,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313978041] [2024-11-28 04:08:25,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:25,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:08:25,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:25,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:08:25,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:08:25,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:08:25,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:25,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:25,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:08:25,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:27,227 INFO L124 PetriNetUnfolderBase]: 5941/8738 cut-off events. [2024-11-28 04:08:27,228 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-28 04:08:27,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17354 conditions, 8738 events. 5941/8738 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 55422 event pairs, 5068 based on Foata normal form. 1/5250 useless extension candidates. Maximal degree in co-relation 8662. Up to 4217 conditions per place. [2024-11-28 04:08:27,274 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 74 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-11-28 04:08:27,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 418 flow [2024-11-28 04:08:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:08:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 04:08:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-11-28 04:08:27,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-11-28 04:08:27,276 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 128 flow. Second operand 8 states and 185 transitions. [2024-11-28 04:08:27,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 418 flow [2024-11-28 04:08:27,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:27,279 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 201 flow [2024-11-28 04:08:27,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-11-28 04:08:27,280 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-11-28 04:08:27,280 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 201 flow [2024-11-28 04:08:27,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:27,281 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:27,281 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-28 04:08:27,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:08:27,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:27,482 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:27,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1863533776, now seen corresponding path program 2 times [2024-11-28 04:08:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629845229] [2024-11-28 04:08:27,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:27,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:27,514 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:08:27,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629845229] [2024-11-28 04:08:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629845229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918389778] [2024-11-28 04:08:27,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:27,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:27,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:08:27,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:27,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:27,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:08:27,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:27,999 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 8 treesize of output 1 [2024-11-28 04:08:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:08:28,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:08:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918389778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:28,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-28 04:08:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447003080] [2024-11-28 04:08:28,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:28,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:08:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:28,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:08:28,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:08:28,540 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:28,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:28,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:28,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:29,858 INFO L124 PetriNetUnfolderBase]: 5941/8736 cut-off events. [2024-11-28 04:08:29,858 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-28 04:08:29,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17376 conditions, 8736 events. 5941/8736 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 55626 event pairs, 5068 based on Foata normal form. 2/5240 useless extension candidates. Maximal degree in co-relation 8666. Up to 8425 conditions per place. [2024-11-28 04:08:29,918 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 34 selfloop transitions, 19 changer transitions 0/57 dead transitions. [2024-11-28 04:08:29,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 313 flow [2024-11-28 04:08:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:08:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:08:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-11-28 04:08:29,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3012987012987013 [2024-11-28 04:08:29,920 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 201 flow. Second operand 7 states and 116 transitions. [2024-11-28 04:08:29,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 313 flow [2024-11-28 04:08:29,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 289 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:29,923 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 221 flow [2024-11-28 04:08:29,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-11-28 04:08:29,924 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-11-28 04:08:29,924 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 221 flow [2024-11-28 04:08:29,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:29,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:29,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:29,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:08:30,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:30,134 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:30,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046413, now seen corresponding path program 1 times [2024-11-28 04:08:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:30,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548929281] [2024-11-28 04:08:30,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:08:30,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:30,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548929281] [2024-11-28 04:08:30,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548929281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:08:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485950000] [2024-11-28 04:08:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:30,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:08:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:30,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:08:30,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:08:30,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:30,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:30,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:30,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:30,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:30,962 INFO L124 PetriNetUnfolderBase]: 4065/6024 cut-off events. [2024-11-28 04:08:30,962 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-28 04:08:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11991 conditions, 6024 events. 4065/6024 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36131 event pairs, 3384 based on Foata normal form. 0/3973 useless extension candidates. Maximal degree in co-relation 5972. Up to 5777 conditions per place. [2024-11-28 04:08:31,049 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 44 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-11-28 04:08:31,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 315 flow [2024-11-28 04:08:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:08:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:08:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-28 04:08:31,051 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33090909090909093 [2024-11-28 04:08:31,051 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 221 flow. Second operand 5 states and 91 transitions. [2024-11-28 04:08:31,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 315 flow [2024-11-28 04:08:31,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 303 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:31,053 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 215 flow [2024-11-28 04:08:31,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-11-28 04:08:31,054 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-11-28 04:08:31,054 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 215 flow [2024-11-28 04:08:31,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:31,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:31,057 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:31,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:08:31,057 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:31,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046412, now seen corresponding path program 1 times [2024-11-28 04:08:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:31,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708153779] [2024-11-28 04:08:31,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708153779] [2024-11-28 04:08:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708153779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423579724] [2024-11-28 04:08:31,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:31,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:31,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:08:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:31,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:08:31,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:31,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:08:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:08:31,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:08:31,476 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:08:31,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:08:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:31,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:31,658 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 52 treesize of output 48 [2024-11-28 04:08:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423579724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:31,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:31,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-28 04:08:31,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105923757] [2024-11-28 04:08:31,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:31,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:08:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:31,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:08:31,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:08:31,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:31,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:31,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:31,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:32,912 INFO L124 PetriNetUnfolderBase]: 6493/9448 cut-off events. [2024-11-28 04:08:32,912 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-28 04:08:32,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18817 conditions, 9448 events. 6493/9448 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 58112 event pairs, 1858 based on Foata normal form. 0/6228 useless extension candidates. Maximal degree in co-relation 9386. Up to 3671 conditions per place. [2024-11-28 04:08:32,960 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 77 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-11-28 04:08:32,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 491 flow [2024-11-28 04:08:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:08:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 04:08:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-11-28 04:08:32,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-11-28 04:08:32,962 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 215 flow. Second operand 9 states and 176 transitions. [2024-11-28 04:08:32,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 491 flow [2024-11-28 04:08:32,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:08:32,965 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 271 flow [2024-11-28 04:08:32,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=271, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-11-28 04:08:32,965 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-11-28 04:08:32,966 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 271 flow [2024-11-28 04:08:32,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:32,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:32,966 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:32,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:08:33,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:33,167 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:33,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046411, now seen corresponding path program 1 times [2024-11-28 04:08:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:33,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847385648] [2024-11-28 04:08:33,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:33,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847385648] [2024-11-28 04:08:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847385648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:33,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:33,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:08:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214899738] [2024-11-28 04:08:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:33,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:08:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:33,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:08:33,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:08:33,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:33,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:33,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:33,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:33,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:34,007 INFO L124 PetriNetUnfolderBase]: 4041/5976 cut-off events. [2024-11-28 04:08:34,007 INFO L125 PetriNetUnfolderBase]: For 2638/2638 co-relation queries the response was YES. [2024-11-28 04:08:34,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14443 conditions, 5976 events. 4041/5976 cut-off events. For 2638/2638 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35148 event pairs, 3200 based on Foata normal form. 0/4632 useless extension candidates. Maximal degree in co-relation 7198. Up to 5677 conditions per place. [2024-11-28 04:08:34,047 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 47 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-28 04:08:34,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 360 flow [2024-11-28 04:08:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:08:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:08:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-28 04:08:34,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-11-28 04:08:34,048 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 271 flow. Second operand 4 states and 78 transitions. [2024-11-28 04:08:34,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 360 flow [2024-11-28 04:08:34,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:08:34,054 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 259 flow [2024-11-28 04:08:34,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-28 04:08:34,054 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-11-28 04:08:34,054 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 259 flow [2024-11-28 04:08:34,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:34,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:34,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:34,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:08:34,055 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:34,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046410, now seen corresponding path program 1 times [2024-11-28 04:08:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:34,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816308590] [2024-11-28 04:08:34,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816308590] [2024-11-28 04:08:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816308590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289482519] [2024-11-28 04:08:34,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:34,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:34,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:08:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:34,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:08:34,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:34,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:34,531 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 22 treesize of output 18 [2024-11-28 04:08:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289482519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:34,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:34,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-28 04:08:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683015771] [2024-11-28 04:08:34,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:34,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:08:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:34,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:08:34,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:08:34,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:08:34,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:34,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:34,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:08:34,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:35,284 INFO L124 PetriNetUnfolderBase]: 3629/5428 cut-off events. [2024-11-28 04:08:35,284 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2024-11-28 04:08:35,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 5428 events. 3629/5428 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31877 event pairs, 1760 based on Foata normal form. 0/4358 useless extension candidates. Maximal degree in co-relation 6539. Up to 3341 conditions per place. [2024-11-28 04:08:35,309 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 70 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-11-28 04:08:35,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 495 flow [2024-11-28 04:08:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:08:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:08:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-28 04:08:35,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-11-28 04:08:35,310 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 259 flow. Second operand 7 states and 161 transitions. [2024-11-28 04:08:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 495 flow [2024-11-28 04:08:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:08:35,315 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 278 flow [2024-11-28 04:08:35,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-11-28 04:08:35,316 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-11-28 04:08:35,316 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 278 flow [2024-11-28 04:08:35,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:35,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:35,317 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:35,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:08:35,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:08:35,521 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:35,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2060685287, now seen corresponding path program 1 times [2024-11-28 04:08:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142067626] [2024-11-28 04:08:35,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:35,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142067626] [2024-11-28 04:08:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142067626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029009457] [2024-11-28 04:08:35,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:35,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:35,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:35,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:08:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:35,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:08:35,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:35,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029009457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:35,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:35,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 04:08:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467962715] [2024-11-28 04:08:35,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:35,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:08:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:35,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:08:35,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:08:35,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:08:36,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:36,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:08:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:36,745 INFO L124 PetriNetUnfolderBase]: 2915/4276 cut-off events. [2024-11-28 04:08:36,745 INFO L125 PetriNetUnfolderBase]: For 4387/4387 co-relation queries the response was YES. [2024-11-28 04:08:36,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 4276 events. 2915/4276 cut-off events. For 4387/4387 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22258 event pairs, 2027 based on Foata normal form. 0/3577 useless extension candidates. Maximal degree in co-relation 7981. Up to 2967 conditions per place. [2024-11-28 04:08:36,766 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 82 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-11-28 04:08:36,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 652 flow [2024-11-28 04:08:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:08:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 04:08:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-11-28 04:08:36,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-28 04:08:36,768 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 278 flow. Second operand 9 states and 189 transitions. [2024-11-28 04:08:36,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 652 flow [2024-11-28 04:08:36,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 601 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:08:36,772 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 297 flow [2024-11-28 04:08:36,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-11-28 04:08:36,773 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-11-28 04:08:36,773 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 297 flow [2024-11-28 04:08:36,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:36,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:36,774 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:36,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:08:36,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:36,974 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:36,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash 57885676, now seen corresponding path program 1 times [2024-11-28 04:08:36,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:36,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084924823] [2024-11-28 04:08:36,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:36,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:37,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:37,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084924823] [2024-11-28 04:08:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084924823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:37,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338713476] [2024-11-28 04:08:37,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:37,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:37,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:08:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:37,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:08:37,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:37,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:37,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338713476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:37,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:37,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 04:08:37,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595497827] [2024-11-28 04:08:37,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:37,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:08:37,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:37,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:08:37,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:08:37,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:08:37,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:37,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:37,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:08:37,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:38,033 INFO L124 PetriNetUnfolderBase]: 2805/4118 cut-off events. [2024-11-28 04:08:38,033 INFO L125 PetriNetUnfolderBase]: For 2014/2151 co-relation queries the response was YES. [2024-11-28 04:08:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 4118 events. 2805/4118 cut-off events. For 2014/2151 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21596 event pairs, 1937 based on Foata normal form. 44/3445 useless extension candidates. Maximal degree in co-relation 7855. Up to 3135 conditions per place. [2024-11-28 04:08:38,048 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 84 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2024-11-28 04:08:38,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 643 flow [2024-11-28 04:08:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:08:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 04:08:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-11-28 04:08:38,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-28 04:08:38,050 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 297 flow. Second operand 10 states and 210 transitions. [2024-11-28 04:08:38,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 643 flow [2024-11-28 04:08:38,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 617 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:08:38,055 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 349 flow [2024-11-28 04:08:38,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2024-11-28 04:08:38,056 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-11-28 04:08:38,057 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 349 flow [2024-11-28 04:08:38,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:38,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:38,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:38,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:08:38,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:38,260 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:38,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash 312426272, now seen corresponding path program 1 times [2024-11-28 04:08:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:38,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121640270] [2024-11-28 04:08:38,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:38,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:38,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121640270] [2024-11-28 04:08:38,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121640270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:08:38,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:08:38,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:08:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379738172] [2024-11-28 04:08:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:08:38,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:08:38,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:38,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:08:38,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:08:38,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:38,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:38,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:38,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:38,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:39,134 INFO L124 PetriNetUnfolderBase]: 2913/4329 cut-off events. [2024-11-28 04:08:39,135 INFO L125 PetriNetUnfolderBase]: For 4803/4926 co-relation queries the response was YES. [2024-11-28 04:08:39,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11731 conditions, 4329 events. 2913/4329 cut-off events. For 4803/4926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22478 event pairs, 1251 based on Foata normal form. 0/3547 useless extension candidates. Maximal degree in co-relation 8578. Up to 2335 conditions per place. [2024-11-28 04:08:39,156 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 72 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-11-28 04:08:39,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 647 flow [2024-11-28 04:08:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:08:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:08:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-28 04:08:39,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-11-28 04:08:39,158 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 349 flow. Second operand 6 states and 114 transitions. [2024-11-28 04:08:39,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 647 flow [2024-11-28 04:08:39,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 617 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 04:08:39,163 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 370 flow [2024-11-28 04:08:39,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-11-28 04:08:39,163 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-11-28 04:08:39,163 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 370 flow [2024-11-28 04:08:39,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:39,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:39,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:39,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 04:08:39,164 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:39,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 312426274, now seen corresponding path program 1 times [2024-11-28 04:08:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:39,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518299349] [2024-11-28 04:08:39,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:39,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:39,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518299349] [2024-11-28 04:08:39,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518299349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:39,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393674035] [2024-11-28 04:08:39,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:39,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:39,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:39,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:08:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:39,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:08:39,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:39,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:39,879 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 [2024-11-28 04:08:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:08:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393674035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:40,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:40,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 04:08:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155440926] [2024-11-28 04:08:40,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:40,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:08:40,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:40,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:08:40,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:08:40,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:08:40,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 370 flow. Second operand has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:40,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:40,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:08:40,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:41,936 INFO L124 PetriNetUnfolderBase]: 2884/4372 cut-off events. [2024-11-28 04:08:41,936 INFO L125 PetriNetUnfolderBase]: For 6654/6866 co-relation queries the response was YES. [2024-11-28 04:08:41,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13789 conditions, 4372 events. 2884/4372 cut-off events. For 6654/6866 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23622 event pairs, 1540 based on Foata normal form. 0/3861 useless extension candidates. Maximal degree in co-relation 9621. Up to 2178 conditions per place. [2024-11-28 04:08:41,958 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 104 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-11-28 04:08:41,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 967 flow [2024-11-28 04:08:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:08:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:08:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 301 transitions. [2024-11-28 04:08:41,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36484848484848487 [2024-11-28 04:08:41,960 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 370 flow. Second operand 15 states and 301 transitions. [2024-11-28 04:08:41,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 967 flow [2024-11-28 04:08:41,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 133 transitions, 958 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:08:41,973 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 445 flow [2024-11-28 04:08:41,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=445, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-11-28 04:08:41,974 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-11-28 04:08:41,974 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 445 flow [2024-11-28 04:08:41,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:41,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:41,974 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:41,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:08:42,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:08:42,175 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:42,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash 578323275, now seen corresponding path program 2 times [2024-11-28 04:08:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:42,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557062608] [2024-11-28 04:08:42,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:42,194 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:42,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:42,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:42,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557062608] [2024-11-28 04:08:42,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557062608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:42,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085642522] [2024-11-28 04:08:42,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:42,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:42,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:42,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:08:42,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:42,511 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:42,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:08:42,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:42,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:08:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:08:42,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:08:42,588 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:08:42,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:08:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:42,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:42,797 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 52 treesize of output 48 [2024-11-28 04:08:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085642522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:42,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:42,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 04:08:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414739215] [2024-11-28 04:08:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:42,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:08:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:42,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:08:42,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:08:47,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:08:51,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:08:51,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:08:51,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:51,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:51,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:08:51,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:52,629 INFO L124 PetriNetUnfolderBase]: 5424/8061 cut-off events. [2024-11-28 04:08:52,630 INFO L125 PetriNetUnfolderBase]: For 15627/15886 co-relation queries the response was YES. [2024-11-28 04:08:52,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26412 conditions, 8061 events. 5424/8061 cut-off events. For 15627/15886 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 44928 event pairs, 1735 based on Foata normal form. 0/7354 useless extension candidates. Maximal degree in co-relation 22095. Up to 2843 conditions per place. [2024-11-28 04:08:52,662 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 144 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-11-28 04:08:52,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1339 flow [2024-11-28 04:08:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:08:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:08:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 275 transitions. [2024-11-28 04:08:52,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-28 04:08:52,664 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 445 flow. Second operand 15 states and 275 transitions. [2024-11-28 04:08:52,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1339 flow [2024-11-28 04:08:52,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1273 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-28 04:08:52,679 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 506 flow [2024-11-28 04:08:52,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=506, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2024-11-28 04:08:52,680 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-11-28 04:08:52,680 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 506 flow [2024-11-28 04:08:52,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:52,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:52,680 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:52,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:08:52,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:08:52,885 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:52,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 578323277, now seen corresponding path program 1 times [2024-11-28 04:08:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791246513] [2024-11-28 04:08:52,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:08:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791246513] [2024-11-28 04:08:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791246513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146951378] [2024-11-28 04:08:53,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:08:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:53,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:53,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:08:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:08:53,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:08:53,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:08:53,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:53,462 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 22 treesize of output 18 [2024-11-28 04:08:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:08:53,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146951378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:53,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-28 04:08:53,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759718633] [2024-11-28 04:08:53,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:53,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:08:53,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:53,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:08:53,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:08:53,787 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:08:53,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 506 flow. Second operand has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:53,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:53,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:08:53,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:08:55,257 INFO L124 PetriNetUnfolderBase]: 4930/7464 cut-off events. [2024-11-28 04:08:55,258 INFO L125 PetriNetUnfolderBase]: For 17350/17590 co-relation queries the response was YES. [2024-11-28 04:08:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 7464 events. 4930/7464 cut-off events. For 17350/17590 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42411 event pairs, 2028 based on Foata normal form. 0/7168 useless extension candidates. Maximal degree in co-relation 22735. Up to 3337 conditions per place. [2024-11-28 04:08:55,296 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 142 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2024-11-28 04:08:55,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 1339 flow [2024-11-28 04:08:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:08:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 04:08:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 291 transitions. [2024-11-28 04:08:55,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37792207792207794 [2024-11-28 04:08:55,298 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 506 flow. Second operand 14 states and 291 transitions. [2024-11-28 04:08:55,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 1339 flow [2024-11-28 04:08:55,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1310 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-28 04:08:55,322 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 517 flow [2024-11-28 04:08:55,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=517, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-11-28 04:08:55,323 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-11-28 04:08:55,323 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 517 flow [2024-11-28 04:08:55,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:55,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:08:55,323 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:08:55,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:08:55,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:08:55,528 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:08:55,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:08:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303560, now seen corresponding path program 2 times [2024-11-28 04:08:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:08:55,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206357311] [2024-11-28 04:08:55,528 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:08:55,554 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:55,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:08:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:08:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206357311] [2024-11-28 04:08:56,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206357311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:08:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54064056] [2024-11-28 04:08:56,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:08:56,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:08:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:08:56,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:08:56,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:08:56,138 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:08:56,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:08:56,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:08:56,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:08:56,154 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 8 treesize of output 1 [2024-11-28 04:08:56,332 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:08:56,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-28 04:08:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:56,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:08:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:08:56,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54064056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:08:56,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:08:56,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-28 04:08:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346999654] [2024-11-28 04:08:56,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:08:56,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:08:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:08:56,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:08:56,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:08:57,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:08:57,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 517 flow. Second operand has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:08:57,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:08:57,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:08:57,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:00,373 INFO L124 PetriNetUnfolderBase]: 6524/9258 cut-off events. [2024-11-28 04:09:00,373 INFO L125 PetriNetUnfolderBase]: For 26573/27050 co-relation queries the response was YES. [2024-11-28 04:09:00,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 9258 events. 6524/9258 cut-off events. For 26573/27050 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 46978 event pairs, 1481 based on Foata normal form. 2/9257 useless extension candidates. Maximal degree in co-relation 29237. Up to 2196 conditions per place. [2024-11-28 04:09:00,420 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 198 selfloop transitions, 31 changer transitions 0/232 dead transitions. [2024-11-28 04:09:00,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 1854 flow [2024-11-28 04:09:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:09:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 04:09:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 391 transitions. [2024-11-28 04:09:00,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3231404958677686 [2024-11-28 04:09:00,422 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 517 flow. Second operand 22 states and 391 transitions. [2024-11-28 04:09:00,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 1854 flow [2024-11-28 04:09:00,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 232 transitions, 1718 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-11-28 04:09:00,438 INFO L231 Difference]: Finished difference. Result has 118 places, 85 transitions, 647 flow [2024-11-28 04:09:00,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=647, PETRI_PLACES=118, PETRI_TRANSITIONS=85} [2024-11-28 04:09:00,438 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-11-28 04:09:00,438 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 85 transitions, 647 flow [2024-11-28 04:09:00,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:00,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:00,439 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:00,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:09:00,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:09:00,639 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:00,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303558, now seen corresponding path program 1 times [2024-11-28 04:09:00,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:00,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819868724] [2024-11-28 04:09:00,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:09:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819868724] [2024-11-28 04:09:00,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819868724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290495425] [2024-11-28 04:09:00,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:00,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:09:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:00,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:09:01,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:01,016 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 8 treesize of output 1 [2024-11-28 04:09:01,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:09:01,132 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:09:01,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:09:01,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-28 04:09:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:09:01,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:09:02,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290495425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:02,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:02,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-28 04:09:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751736558] [2024-11-28 04:09:02,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:02,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:09:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:02,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:09:02,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:09:02,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 55 [2024-11-28 04:09:02,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 85 transitions, 647 flow. Second operand has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:02,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:02,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 55 [2024-11-28 04:09:02,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:04,177 INFO L124 PetriNetUnfolderBase]: 4783/7061 cut-off events. [2024-11-28 04:09:04,177 INFO L125 PetriNetUnfolderBase]: For 21077/21781 co-relation queries the response was YES. [2024-11-28 04:09:04,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 7061 events. 4783/7061 cut-off events. For 21077/21781 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 36633 event pairs, 1582 based on Foata normal form. 321/7194 useless extension candidates. Maximal degree in co-relation 22936. Up to 2722 conditions per place. [2024-11-28 04:09:04,209 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 153 selfloop transitions, 25 changer transitions 0/184 dead transitions. [2024-11-28 04:09:04,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 184 transitions, 1474 flow [2024-11-28 04:09:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:09:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:09:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 259 transitions. [2024-11-28 04:09:04,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31393939393939396 [2024-11-28 04:09:04,211 INFO L175 Difference]: Start difference. First operand has 118 places, 85 transitions, 647 flow. Second operand 15 states and 259 transitions. [2024-11-28 04:09:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 184 transitions, 1474 flow [2024-11-28 04:09:04,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 184 transitions, 1432 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-28 04:09:04,246 INFO L231 Difference]: Finished difference. Result has 123 places, 85 transitions, 660 flow [2024-11-28 04:09:04,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=660, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2024-11-28 04:09:04,246 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-11-28 04:09:04,247 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 660 flow [2024-11-28 04:09:04,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:04,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:04,247 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:04,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:09:04,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:09:04,447 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:04,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash 297965264, now seen corresponding path program 1 times [2024-11-28 04:09:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:04,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843308006] [2024-11-28 04:09:04,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:09:04,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:04,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843308006] [2024-11-28 04:09:04,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843308006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:04,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962547241] [2024-11-28 04:09:04,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:04,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:04,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:04,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:04,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:09:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:04,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:09:04,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:09:04,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:09:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962547241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:04,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 04:09:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256688929] [2024-11-28 04:09:04,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:04,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:09:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:04,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:09:04,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:09:04,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:04,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 660 flow. Second operand has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:04,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:04,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:04,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:05,900 INFO L124 PetriNetUnfolderBase]: 5603/7930 cut-off events. [2024-11-28 04:09:05,901 INFO L125 PetriNetUnfolderBase]: For 28402/29528 co-relation queries the response was YES. [2024-11-28 04:09:05,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31336 conditions, 7930 events. 5603/7930 cut-off events. For 28402/29528 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 38135 event pairs, 3830 based on Foata normal form. 177/7888 useless extension candidates. Maximal degree in co-relation 28160. Up to 6817 conditions per place. [2024-11-28 04:09:05,938 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-11-28 04:09:05,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 1018 flow [2024-11-28 04:09:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:09:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 04:09:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-11-28 04:09:05,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-11-28 04:09:05,940 INFO L175 Difference]: Start difference. First operand has 123 places, 85 transitions, 660 flow. Second operand 10 states and 198 transitions. [2024-11-28 04:09:05,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 1018 flow [2024-11-28 04:09:05,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 116 transitions, 960 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-28 04:09:05,959 INFO L231 Difference]: Finished difference. Result has 118 places, 84 transitions, 652 flow [2024-11-28 04:09:05,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=118, PETRI_TRANSITIONS=84} [2024-11-28 04:09:05,960 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-11-28 04:09:05,960 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 84 transitions, 652 flow [2024-11-28 04:09:05,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:05,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:05,960 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:05,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:09:06,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:06,161 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:06,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash 504381784, now seen corresponding path program 2 times [2024-11-28 04:09:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:06,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173416870] [2024-11-28 04:09:06,162 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:06,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:06,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:06,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:09:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173416870] [2024-11-28 04:09:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173416870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977811849] [2024-11-28 04:09:06,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:06,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:06,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:06,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:06,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:09:06,462 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:06,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:06,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:09:06,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:09:06,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:09:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977811849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:06,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 04:09:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847619682] [2024-11-28 04:09:06,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:06,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:09:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:06,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:09:06,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:09:06,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:06,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 84 transitions, 652 flow. Second operand has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:06,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:06,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:08,646 INFO L124 PetriNetUnfolderBase]: 9759/13820 cut-off events. [2024-11-28 04:09:08,646 INFO L125 PetriNetUnfolderBase]: For 34689/35658 co-relation queries the response was YES. [2024-11-28 04:09:08,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53609 conditions, 13820 events. 9759/13820 cut-off events. For 34689/35658 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 73280 event pairs, 4565 based on Foata normal form. 146/13616 useless extension candidates. Maximal degree in co-relation 36042. Up to 7116 conditions per place. [2024-11-28 04:09:08,744 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 172 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-11-28 04:09:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 1783 flow [2024-11-28 04:09:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:09:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:09:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-11-28 04:09:08,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3972027972027972 [2024-11-28 04:09:08,746 INFO L175 Difference]: Start difference. First operand has 118 places, 84 transitions, 652 flow. Second operand 13 states and 284 transitions. [2024-11-28 04:09:08,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 1783 flow [2024-11-28 04:09:08,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 209 transitions, 1723 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-28 04:09:08,816 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 812 flow [2024-11-28 04:09:08,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=812, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2024-11-28 04:09:08,817 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-11-28 04:09:08,817 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 812 flow [2024-11-28 04:09:08,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:08,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:08,818 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:08,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:09:09,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:09,019 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:09,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash -454942228, now seen corresponding path program 2 times [2024-11-28 04:09:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737854424] [2024-11-28 04:09:09,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:09,053 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:09,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:09:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737854424] [2024-11-28 04:09:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737854424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487289138] [2024-11-28 04:09:09,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:09,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:09,481 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:09,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:09:09,580 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:09,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:09,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:09:09,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:09,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:09:09,668 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:09:09,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-28 04:09:09,683 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:09:09,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:09:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:09:09,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:10,295 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 65 treesize of output 61 [2024-11-28 04:09:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:09:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487289138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:10,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-28 04:09:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379082409] [2024-11-28 04:09:10,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:10,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:09:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:10,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:09:10,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:09:10,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:09:10,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 812 flow. Second operand has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:10,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:10,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:09:10,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:12,860 INFO L124 PetriNetUnfolderBase]: 9491/13207 cut-off events. [2024-11-28 04:09:12,860 INFO L125 PetriNetUnfolderBase]: For 55770/58052 co-relation queries the response was YES. [2024-11-28 04:09:12,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55706 conditions, 13207 events. 9491/13207 cut-off events. For 55770/58052 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 68800 event pairs, 1820 based on Foata normal form. 463/13330 useless extension candidates. Maximal degree in co-relation 43695. Up to 3879 conditions per place. [2024-11-28 04:09:12,941 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 175 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-11-28 04:09:12,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 199 transitions, 2061 flow [2024-11-28 04:09:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:09:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 04:09:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-11-28 04:09:12,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3477272727272727 [2024-11-28 04:09:12,942 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 812 flow. Second operand 8 states and 153 transitions. [2024-11-28 04:09:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 199 transitions, 2061 flow [2024-11-28 04:09:12,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 199 transitions, 2004 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-28 04:09:12,995 INFO L231 Difference]: Finished difference. Result has 130 places, 95 transitions, 826 flow [2024-11-28 04:09:12,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=130, PETRI_TRANSITIONS=95} [2024-11-28 04:09:12,995 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-11-28 04:09:12,995 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 95 transitions, 826 flow [2024-11-28 04:09:12,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:12,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:12,996 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:13,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:09:13,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:09:13,197 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:13,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash -454942226, now seen corresponding path program 1 times [2024-11-28 04:09:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992345718] [2024-11-28 04:09:13,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:09:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992345718] [2024-11-28 04:09:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992345718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133784730] [2024-11-28 04:09:13,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:13,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:13,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:13,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:13,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:09:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:13,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 04:09:13,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:09:13,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:14,154 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 [2024-11-28 04:09:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:09:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133784730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:14,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:14,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-28 04:09:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30939312] [2024-11-28 04:09:14,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:14,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:09:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:14,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:09:14,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:09:15,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 95 transitions, 826 flow. Second operand has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:19,230 INFO L124 PetriNetUnfolderBase]: 12117/16793 cut-off events. [2024-11-28 04:09:19,231 INFO L125 PetriNetUnfolderBase]: For 77718/80676 co-relation queries the response was YES. [2024-11-28 04:09:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74940 conditions, 16793 events. 12117/16793 cut-off events. For 77718/80676 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90061 event pairs, 2519 based on Foata normal form. 605/16954 useless extension candidates. Maximal degree in co-relation 60346. Up to 2191 conditions per place. [2024-11-28 04:09:19,346 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 397 selfloop transitions, 48 changer transitions 0/450 dead transitions. [2024-11-28 04:09:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 450 transitions, 4125 flow [2024-11-28 04:09:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:09:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 04:09:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 707 transitions. [2024-11-28 04:09:19,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36727272727272725 [2024-11-28 04:09:19,348 INFO L175 Difference]: Start difference. First operand has 130 places, 95 transitions, 826 flow. Second operand 35 states and 707 transitions. [2024-11-28 04:09:19,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 450 transitions, 4125 flow [2024-11-28 04:09:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 450 transitions, 4058 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-28 04:09:19,429 INFO L231 Difference]: Finished difference. Result has 158 places, 109 transitions, 980 flow [2024-11-28 04:09:19,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=980, PETRI_PLACES=158, PETRI_TRANSITIONS=109} [2024-11-28 04:09:19,429 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-11-28 04:09:19,429 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 109 transitions, 980 flow [2024-11-28 04:09:19,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:19,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:19,430 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:19,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:09:19,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 04:09:19,630 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:19,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -952144469, now seen corresponding path program 1 times [2024-11-28 04:09:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455314645] [2024-11-28 04:09:19,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:09:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455314645] [2024-11-28 04:09:19,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455314645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:19,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361891548] [2024-11-28 04:09:19,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:19,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:19,807 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:19,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:09:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:19,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:09:19,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:09:20,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:09:20,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361891548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:20,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:20,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 04:09:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421047622] [2024-11-28 04:09:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:20,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:09:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:20,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:09:20,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:09:20,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:20,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 109 transitions, 980 flow. Second operand has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:20,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:20,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:20,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:22,184 INFO L124 PetriNetUnfolderBase]: 8527/12268 cut-off events. [2024-11-28 04:09:22,184 INFO L125 PetriNetUnfolderBase]: For 57985/59448 co-relation queries the response was YES. [2024-11-28 04:09:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54875 conditions, 12268 events. 8527/12268 cut-off events. For 57985/59448 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 64901 event pairs, 4328 based on Foata normal form. 337/12431 useless extension candidates. Maximal degree in co-relation 43446. Up to 6290 conditions per place. [2024-11-28 04:09:22,297 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 147 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-11-28 04:09:22,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 188 transitions, 1924 flow [2024-11-28 04:09:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:09:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 04:09:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-11-28 04:09:22,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-11-28 04:09:22,299 INFO L175 Difference]: Start difference. First operand has 158 places, 109 transitions, 980 flow. Second operand 12 states and 236 transitions. [2024-11-28 04:09:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 188 transitions, 1924 flow [2024-11-28 04:09:22,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 1690 flow, removed 14 selfloop flow, removed 25 redundant places. [2024-11-28 04:09:22,448 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 947 flow [2024-11-28 04:09:22,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=947, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-11-28 04:09:22,449 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-11-28 04:09:22,449 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 947 flow [2024-11-28 04:09:22,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:22,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:22,450 INFO L206 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] [2024-11-28 04:09:22,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 04:09:22,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 04:09:22,650 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:22,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1809192991, now seen corresponding path program 1 times [2024-11-28 04:09:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743091661] [2024-11-28 04:09:22,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:22,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:09:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743091661] [2024-11-28 04:09:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743091661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:09:22,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:09:22,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:09:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375658031] [2024-11-28 04:09:22,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:09:22,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:09:22,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:22,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:09:22,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:09:22,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:09:22,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 947 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:22,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:22,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:09:22,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:23,909 INFO L124 PetriNetUnfolderBase]: 7229/10795 cut-off events. [2024-11-28 04:09:23,910 INFO L125 PetriNetUnfolderBase]: For 50247/51703 co-relation queries the response was YES. [2024-11-28 04:09:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46933 conditions, 10795 events. 7229/10795 cut-off events. For 50247/51703 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 59510 event pairs, 1752 based on Foata normal form. 99/10733 useless extension candidates. Maximal degree in co-relation 38000. Up to 9140 conditions per place. [2024-11-28 04:09:23,994 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 127 selfloop transitions, 5 changer transitions 1/145 dead transitions. [2024-11-28 04:09:23,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 145 transitions, 1431 flow [2024-11-28 04:09:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:09:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:09:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-28 04:09:23,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-11-28 04:09:23,995 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 947 flow. Second operand 3 states and 86 transitions. [2024-11-28 04:09:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 145 transitions, 1431 flow [2024-11-28 04:09:24,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1385 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-28 04:09:24,071 INFO L231 Difference]: Finished difference. Result has 142 places, 117 transitions, 945 flow [2024-11-28 04:09:24,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=945, PETRI_PLACES=142, PETRI_TRANSITIONS=117} [2024-11-28 04:09:24,071 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-28 04:09:24,071 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 117 transitions, 945 flow [2024-11-28 04:09:24,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:24,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:24,072 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:24,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 04:09:24,072 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:24,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash -105805124, now seen corresponding path program 3 times [2024-11-28 04:09:24,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:24,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350277819] [2024-11-28 04:09:24,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:09:24,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:24,088 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:09:24,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:09:24,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350277819] [2024-11-28 04:09:24,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350277819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:24,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893402654] [2024-11-28 04:09:24,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:09:24,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:24,367 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:24,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:09:24,467 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:09:24,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:24,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:09:24,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:24,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:09:24,550 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:09:24,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-28 04:09:24,566 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:09:24,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:09:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:09:24,637 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:24,869 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 42 treesize of output 38 [2024-11-28 04:09:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:09:24,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893402654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:24,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:24,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-28 04:09:24,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76305810] [2024-11-28 04:09:24,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:24,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:09:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:24,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:09:24,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:09:25,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:09:25,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 117 transitions, 945 flow. Second operand has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:25,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:25,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:09:25,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:27,376 INFO L124 PetriNetUnfolderBase]: 8806/12741 cut-off events. [2024-11-28 04:09:27,376 INFO L125 PetriNetUnfolderBase]: For 52824/53652 co-relation queries the response was YES. [2024-11-28 04:09:27,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57067 conditions, 12741 events. 8806/12741 cut-off events. For 52824/53652 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 69246 event pairs, 2885 based on Foata normal form. 200/12778 useless extension candidates. Maximal degree in co-relation 48247. Up to 5871 conditions per place. [2024-11-28 04:09:27,675 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 202 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-11-28 04:09:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 237 transitions, 2179 flow [2024-11-28 04:09:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:09:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 04:09:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-11-28 04:09:27,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-28 04:09:27,677 INFO L175 Difference]: Start difference. First operand has 142 places, 117 transitions, 945 flow. Second operand 8 states and 154 transitions. [2024-11-28 04:09:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 237 transitions, 2179 flow [2024-11-28 04:09:27,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2168 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:09:27,764 INFO L231 Difference]: Finished difference. Result has 147 places, 117 transitions, 1003 flow [2024-11-28 04:09:27,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=147, PETRI_TRANSITIONS=117} [2024-11-28 04:09:27,765 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-11-28 04:09:27,765 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 117 transitions, 1003 flow [2024-11-28 04:09:27,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:27,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:27,765 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:27,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:09:27,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:09:27,965 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:27,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash -609665983, now seen corresponding path program 1 times [2024-11-28 04:09:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:27,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732457785] [2024-11-28 04:09:27,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:09:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732457785] [2024-11-28 04:09:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732457785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:09:28,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:09:28,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:09:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944016985] [2024-11-28 04:09:28,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:09:28,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:09:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:28,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:09:28,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:09:28,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:28,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 117 transitions, 1003 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:28,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:28,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:28,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:29,816 INFO L124 PetriNetUnfolderBase]: 8191/11802 cut-off events. [2024-11-28 04:09:29,816 INFO L125 PetriNetUnfolderBase]: For 73860/75827 co-relation queries the response was YES. [2024-11-28 04:09:29,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55914 conditions, 11802 events. 8191/11802 cut-off events. For 73860/75827 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 62342 event pairs, 2347 based on Foata normal form. 535/11876 useless extension candidates. Maximal degree in co-relation 46334. Up to 6376 conditions per place. [2024-11-28 04:09:29,890 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 131 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-11-28 04:09:29,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 156 transitions, 1689 flow [2024-11-28 04:09:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:09:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:09:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-28 04:09:29,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-11-28 04:09:29,891 INFO L175 Difference]: Start difference. First operand has 147 places, 117 transitions, 1003 flow. Second operand 4 states and 91 transitions. [2024-11-28 04:09:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 156 transitions, 1689 flow [2024-11-28 04:09:29,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1617 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-28 04:09:29,957 INFO L231 Difference]: Finished difference. Result has 142 places, 113 transitions, 968 flow [2024-11-28 04:09:29,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=968, PETRI_PLACES=142, PETRI_TRANSITIONS=113} [2024-11-28 04:09:29,958 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-28 04:09:29,958 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 113 transitions, 968 flow [2024-11-28 04:09:29,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:29,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:29,958 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:29,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 04:09:29,958 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:29,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1251195837, now seen corresponding path program 1 times [2024-11-28 04:09:29,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:29,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817881354] [2024-11-28 04:09:29,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:29,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:09:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817881354] [2024-11-28 04:09:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817881354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768959497] [2024-11-28 04:09:30,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:30,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:30,051 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:30,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:09:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:30,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:09:30,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:09:30,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:09:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768959497] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:30,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:09:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 04:09:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112957709] [2024-11-28 04:09:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:09:30,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:09:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:30,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:09:30,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:09:30,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:30,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 113 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:30,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:30,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:30,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:31,383 INFO L124 PetriNetUnfolderBase]: 7672/11318 cut-off events. [2024-11-28 04:09:31,383 INFO L125 PetriNetUnfolderBase]: For 57585/58191 co-relation queries the response was YES. [2024-11-28 04:09:31,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52694 conditions, 11318 events. 7672/11318 cut-off events. For 57585/58191 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 62521 event pairs, 2291 based on Foata normal form. 328/11458 useless extension candidates. Maximal degree in co-relation 43307. Up to 6117 conditions per place. [2024-11-28 04:09:31,468 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 128 selfloop transitions, 13 changer transitions 0/150 dead transitions. [2024-11-28 04:09:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 150 transitions, 1497 flow [2024-11-28 04:09:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:09:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:09:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-28 04:09:31,469 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-28 04:09:31,469 INFO L175 Difference]: Start difference. First operand has 142 places, 113 transitions, 968 flow. Second operand 5 states and 105 transitions. [2024-11-28 04:09:31,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 150 transitions, 1497 flow [2024-11-28 04:09:31,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 150 transitions, 1435 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:09:31,597 INFO L231 Difference]: Finished difference. Result has 142 places, 110 transitions, 924 flow [2024-11-28 04:09:31,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=142, PETRI_TRANSITIONS=110} [2024-11-28 04:09:31,597 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-28 04:09:31,597 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 110 transitions, 924 flow [2024-11-28 04:09:31,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:31,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:31,597 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:31,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 04:09:31,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 04:09:31,798 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:31,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:31,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1068756495, now seen corresponding path program 2 times [2024-11-28 04:09:31,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:31,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106960759] [2024-11-28 04:09:31,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:31,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:31,815 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:31,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:09:32,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:32,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106960759] [2024-11-28 04:09:32,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106960759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137430307] [2024-11-28 04:09:32,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:09:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:32,016 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:32,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:09:32,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:09:32,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:09:32,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:09:32,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:09:32,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:09:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137430307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:09:32,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:09:32,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-28 04:09:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613384765] [2024-11-28 04:09:32,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:09:32,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:09:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:09:32,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:09:32,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:09:32,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:09:32,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 110 transitions, 924 flow. Second operand has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:32,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:09:32,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:09:32,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:09:35,041 INFO L124 PetriNetUnfolderBase]: 10119/14724 cut-off events. [2024-11-28 04:09:35,041 INFO L125 PetriNetUnfolderBase]: For 74290/76010 co-relation queries the response was YES. [2024-11-28 04:09:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67810 conditions, 14724 events. 10119/14724 cut-off events. For 74290/76010 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 82886 event pairs, 4037 based on Foata normal form. 388/14965 useless extension candidates. Maximal degree in co-relation 56698. Up to 5311 conditions per place. [2024-11-28 04:09:35,161 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 199 selfloop transitions, 47 changer transitions 0/258 dead transitions. [2024-11-28 04:09:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 2596 flow [2024-11-28 04:09:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:09:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:09:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-11-28 04:09:35,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35515151515151516 [2024-11-28 04:09:35,163 INFO L175 Difference]: Start difference. First operand has 142 places, 110 transitions, 924 flow. Second operand 15 states and 293 transitions. [2024-11-28 04:09:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 2596 flow [2024-11-28 04:09:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 258 transitions, 2524 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:09:35,316 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1274 flow [2024-11-28 04:09:35,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1274, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-11-28 04:09:35,317 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-11-28 04:09:35,317 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1274 flow [2024-11-28 04:09:35,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:09:35,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:09:35,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:09:35,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:09:35,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:35,518 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:09:35,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:09:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1887905725, now seen corresponding path program 1 times [2024-11-28 04:09:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:09:35,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283699112] [2024-11-28 04:09:35,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:09:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:09:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:09:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283699112] [2024-11-28 04:09:36,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283699112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:09:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227079643] [2024-11-28 04:09:36,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:09:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:09:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:36,262 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:09:36,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:09:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:09:36,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:09:36,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:09:36,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:09:36,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:09:36,509 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:09:36,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:09:36,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:09:36,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 04:09:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:09:36,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:09:45,522 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-28 04:09:45,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 3054 treesize of output 2144 [2024-11-28 04:09:45,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:09:45,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 921 treesize of output 849 [2024-11-28 04:09:56,348 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 04:09:57,127 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:10,051 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:10,668 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:11,933 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:15,291 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:20,905 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:20,906 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:21,169 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:28,955 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:29,113 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:29,392 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:29,966 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:30,010 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:30,152 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 04:10:30,782 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 15 treesize of output 9 [2024-11-28 04:10:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:10:34,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227079643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:34,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:10:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-28 04:10:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452971792] [2024-11-28 04:10:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:34,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:10:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:10:34,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:10:34,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=653, Unknown=3, NotChecked=0, Total=756 [2024-11-28 04:10:38,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:43,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:47,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:51,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:55,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:59,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:10:59,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-11-28 04:10:59,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1274 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:59,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:59,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-11-28 04:10:59,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:11:05,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:09,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:13,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:22,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:24,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:26,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:30,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:35,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:39,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:43,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:48,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:53,285 INFO L124 PetriNetUnfolderBase]: 17365/24397 cut-off events. [2024-11-28 04:11:53,285 INFO L125 PetriNetUnfolderBase]: For 137946/137946 co-relation queries the response was YES. [2024-11-28 04:11:53,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117318 conditions, 24397 events. 17365/24397 cut-off events. For 137946/137946 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 126524 event pairs, 8053 based on Foata normal form. 1/23476 useless extension candidates. Maximal degree in co-relation 98701. Up to 22611 conditions per place. [2024-11-28 04:11:53,443 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 141 selfloop transitions, 44 changer transitions 39/225 dead transitions. [2024-11-28 04:11:53,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 225 transitions, 2358 flow [2024-11-28 04:11:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:11:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:11:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 206 transitions. [2024-11-28 04:11:53,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22032085561497325 [2024-11-28 04:11:53,445 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1274 flow. Second operand 17 states and 206 transitions. [2024-11-28 04:11:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 225 transitions, 2358 flow [2024-11-28 04:11:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 225 transitions, 2344 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-28 04:11:53,686 INFO L231 Difference]: Finished difference. Result has 181 places, 136 transitions, 1424 flow [2024-11-28 04:11:53,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1424, PETRI_PLACES=181, PETRI_TRANSITIONS=136} [2024-11-28 04:11:53,687 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-11-28 04:11:53,687 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 136 transitions, 1424 flow [2024-11-28 04:11:53,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:11:53,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:11:53,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:53,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:11:53,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:53,888 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:11:53,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1898478259, now seen corresponding path program 2 times [2024-11-28 04:11:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985186855] [2024-11-28 04:11:53,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:53,918 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:53,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:55,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:55,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985186855] [2024-11-28 04:11:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985186855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:55,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555626791] [2024-11-28 04:11:55,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:55,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:55,283 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:55,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:11:55,405 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:55,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:55,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 04:11:55,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:55,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:11:56,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:56,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 04:11:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:56,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:57,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:57,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 04:11:57,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:11:57,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 120 [2024-11-28 04:11:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:58,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555626791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:58,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:58,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2024-11-28 04:11:58,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339031483] [2024-11-28 04:11:58,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:58,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:11:58,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:58,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:11:58,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:12:00,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:12:00,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 136 transitions, 1424 flow. Second operand has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:00,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:00,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:12:00,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:05,946 INFO L124 PetriNetUnfolderBase]: 8466/13191 cut-off events. [2024-11-28 04:12:05,946 INFO L125 PetriNetUnfolderBase]: For 85129/87062 co-relation queries the response was YES. [2024-11-28 04:12:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63188 conditions, 13191 events. 8466/13191 cut-off events. For 85129/87062 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 81601 event pairs, 4960 based on Foata normal form. 213/13265 useless extension candidates. Maximal degree in co-relation 63129. Up to 11058 conditions per place. [2024-11-28 04:12:06,230 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 136 selfloop transitions, 97 changer transitions 26/272 dead transitions. [2024-11-28 04:12:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3045 flow [2024-11-28 04:12:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:12:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 04:12:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 389 transitions. [2024-11-28 04:12:06,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2946969696969697 [2024-11-28 04:12:06,232 INFO L175 Difference]: Start difference. First operand has 181 places, 136 transitions, 1424 flow. Second operand 24 states and 389 transitions. [2024-11-28 04:12:06,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3045 flow [2024-11-28 04:12:06,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2949 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-11-28 04:12:06,352 INFO L231 Difference]: Finished difference. Result has 201 places, 185 transitions, 2156 flow [2024-11-28 04:12:06,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2156, PETRI_PLACES=201, PETRI_TRANSITIONS=185} [2024-11-28 04:12:06,353 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 145 predicate places. [2024-11-28 04:12:06,353 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 185 transitions, 2156 flow [2024-11-28 04:12:06,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:06,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:06,353 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:06,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:12:06,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:06,554 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:12:06,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1185429869, now seen corresponding path program 3 times [2024-11-28 04:12:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322373969] [2024-11-28 04:12:06,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:12:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:06,573 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:12:06,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:12:07,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:07,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322373969] [2024-11-28 04:12:07,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322373969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067591232] [2024-11-28 04:12:07,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:12:07,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:07,542 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:07,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:12:07,666 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:12:07,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:07,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:12:07,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:07,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:12:08,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:08,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 04:12:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:08,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:09,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:09,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 04:12:09,779 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:12:09,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:09,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 83 [2024-11-28 04:12:09,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:09,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 190 [2024-11-28 04:12:09,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:09,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 134 [2024-11-28 04:12:10,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:10,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 313 [2024-11-28 04:12:10,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:10,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 196 [2024-11-28 04:12:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067591232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:10,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-28 04:12:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799583494] [2024-11-28 04:12:10,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:10,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:12:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:10,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:12:10,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:12:12,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:12:12,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 185 transitions, 2156 flow. Second operand has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:12,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:12,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:12:12,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:18,202 INFO L124 PetriNetUnfolderBase]: 8675/13458 cut-off events. [2024-11-28 04:12:18,202 INFO L125 PetriNetUnfolderBase]: For 105304/107030 co-relation queries the response was YES. [2024-11-28 04:12:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70593 conditions, 13458 events. 8675/13458 cut-off events. For 105304/107030 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 83554 event pairs, 3953 based on Foata normal form. 199/13497 useless extension candidates. Maximal degree in co-relation 69288. Up to 11302 conditions per place. [2024-11-28 04:12:18,431 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 172 selfloop transitions, 104 changer transitions 27/316 dead transitions. [2024-11-28 04:12:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 316 transitions, 3902 flow [2024-11-28 04:12:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:12:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 04:12:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 444 transitions. [2024-11-28 04:12:18,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-28 04:12:18,434 INFO L175 Difference]: Start difference. First operand has 201 places, 185 transitions, 2156 flow. Second operand 24 states and 444 transitions. [2024-11-28 04:12:18,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 316 transitions, 3902 flow [2024-11-28 04:12:18,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 3673 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-11-28 04:12:18,799 INFO L231 Difference]: Finished difference. Result has 224 places, 220 transitions, 2712 flow [2024-11-28 04:12:18,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2712, PETRI_PLACES=224, PETRI_TRANSITIONS=220} [2024-11-28 04:12:18,800 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-11-28 04:12:18,801 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 220 transitions, 2712 flow [2024-11-28 04:12:18,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:18,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:18,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:18,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:12:19,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:19,002 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:12:19,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 407655071, now seen corresponding path program 4 times [2024-11-28 04:12:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2935461] [2024-11-28 04:12:19,003 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:12:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:19,040 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:12:19,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:20,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2935461] [2024-11-28 04:12:20,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2935461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419319657] [2024-11-28 04:12:20,538 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:12:20,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:20,540 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:20,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:12:20,665 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:12:20,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:20,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:12:20,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:20,681 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 8 treesize of output 1 [2024-11-28 04:12:20,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:12:20,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:12:20,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:12:20,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:12:21,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 04:12:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:21,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:22,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419319657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:22,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:22,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-28 04:12:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913217197] [2024-11-28 04:12:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:22,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:12:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:22,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:12:22,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:12:24,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-28 04:12:24,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 220 transitions, 2712 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:24,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:12:24,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-28 04:12:24,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:12:29,483 INFO L124 PetriNetUnfolderBase]: 8661/13400 cut-off events. [2024-11-28 04:12:29,483 INFO L125 PetriNetUnfolderBase]: For 117749/119531 co-relation queries the response was YES. [2024-11-28 04:12:29,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72973 conditions, 13400 events. 8661/13400 cut-off events. For 117749/119531 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 82101 event pairs, 4165 based on Foata normal form. 199/13436 useless extension candidates. Maximal degree in co-relation 72790. Up to 11546 conditions per place. [2024-11-28 04:12:29,627 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 142 selfloop transitions, 71 changer transitions 42/268 dead transitions. [2024-11-28 04:12:29,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 268 transitions, 3578 flow [2024-11-28 04:12:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:12:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:12:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 280 transitions. [2024-11-28 04:12:29,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2994652406417112 [2024-11-28 04:12:29,629 INFO L175 Difference]: Start difference. First operand has 224 places, 220 transitions, 2712 flow. Second operand 17 states and 280 transitions. [2024-11-28 04:12:29,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 268 transitions, 3578 flow [2024-11-28 04:12:29,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 268 transitions, 3390 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-11-28 04:12:29,883 INFO L231 Difference]: Finished difference. Result has 228 places, 209 transitions, 2565 flow [2024-11-28 04:12:29,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2565, PETRI_PLACES=228, PETRI_TRANSITIONS=209} [2024-11-28 04:12:29,884 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 172 predicate places. [2024-11-28 04:12:29,884 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 209 transitions, 2565 flow [2024-11-28 04:12:29,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:12:29,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:12:29,884 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:29,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:12:30,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 04:12:30,085 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:12:30,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1747052227, now seen corresponding path program 5 times [2024-11-28 04:12:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966896103] [2024-11-28 04:12:30,086 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:12:30,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:30,105 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:12:30,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:31,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966896103] [2024-11-28 04:12:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966896103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794826411] [2024-11-28 04:12:31,822 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:12:31,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:31,824 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:31,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:12:31,939 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:12:31,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:31,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 04:12:31,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:31,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:12:32,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:12:32,178 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:12:32,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:12:32,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:12:32,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 04:12:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:32,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:42,118 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-28 04:12:42,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1530 treesize of output 1100 [2024-11-28 04:12:42,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:12:42,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 642 [2024-11-28 04:12:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:12:49,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794826411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:49,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:49,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-28 04:12:49,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188234893] [2024-11-28 04:12:49,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:49,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:12:49,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:49,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:12:49,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=717, Unknown=3, NotChecked=0, Total=812 [2024-11-28 04:12:53,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:12:58,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:02,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:06,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:11,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:16,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:16,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-11-28 04:13:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 209 transitions, 2565 flow. Second operand has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:13:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:13:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-11-28 04:13:16,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:13:26,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:30,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:39,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:43,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:47,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:51,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:13:56,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:14:02,261 INFO L124 PetriNetUnfolderBase]: 18444/26150 cut-off events. [2024-11-28 04:14:02,261 INFO L125 PetriNetUnfolderBase]: For 191211/191211 co-relation queries the response was YES. [2024-11-28 04:14:02,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138689 conditions, 26150 events. 18444/26150 cut-off events. For 191211/191211 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 140924 event pairs, 9027 based on Foata normal form. 1/25149 useless extension candidates. Maximal degree in co-relation 138590. Up to 24049 conditions per place. [2024-11-28 04:14:02,548 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 173 selfloop transitions, 65 changer transitions 46/285 dead transitions. [2024-11-28 04:14:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 285 transitions, 3736 flow [2024-11-28 04:14:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:14:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:14:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 193 transitions. [2024-11-28 04:14:02,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20641711229946524 [2024-11-28 04:14:02,549 INFO L175 Difference]: Start difference. First operand has 228 places, 209 transitions, 2565 flow. Second operand 17 states and 193 transitions. [2024-11-28 04:14:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 285 transitions, 3736 flow [2024-11-28 04:14:03,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 285 transitions, 3454 flow, removed 20 selfloop flow, removed 23 redundant places. [2024-11-28 04:14:03,148 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 2399 flow [2024-11-28 04:14:03,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2399, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2024-11-28 04:14:03,149 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2024-11-28 04:14:03,149 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 2399 flow [2024-11-28 04:14:03,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:03,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:14:03,149 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:03,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:14:03,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:03,350 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:14:03,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1666904393, now seen corresponding path program 6 times [2024-11-28 04:14:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39999593] [2024-11-28 04:14:03,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:14:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:03,374 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:14:03,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:14:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:14:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:14:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39999593] [2024-11-28 04:14:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39999593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:14:04,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:14:04,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:14:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129441663] [2024-11-28 04:14:04,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:14:04,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:14:04,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:04,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:14:04,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:14:04,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-28 04:14:04,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 2399 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:04,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:14:04,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-28 04:14:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:14:08,574 INFO L124 PetriNetUnfolderBase]: 9363/14650 cut-off events. [2024-11-28 04:14:08,575 INFO L125 PetriNetUnfolderBase]: For 122325/124245 co-relation queries the response was YES. [2024-11-28 04:14:08,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79427 conditions, 14650 events. 9363/14650 cut-off events. For 122325/124245 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 93621 event pairs, 3303 based on Foata normal form. 235/14734 useless extension candidates. Maximal degree in co-relation 79372. Up to 11768 conditions per place. [2024-11-28 04:14:08,729 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 221 selfloop transitions, 105 changer transitions 14/353 dead transitions. [2024-11-28 04:14:08,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 353 transitions, 4380 flow [2024-11-28 04:14:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:14:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 04:14:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 349 transitions. [2024-11-28 04:14:08,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-11-28 04:14:08,730 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 2399 flow. Second operand 18 states and 349 transitions. [2024-11-28 04:14:08,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 353 transitions, 4380 flow [2024-11-28 04:14:09,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 4109 flow, removed 31 selfloop flow, removed 17 redundant places. [2024-11-28 04:14:09,094 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 3030 flow [2024-11-28 04:14:09,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3030, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-11-28 04:14:09,095 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-11-28 04:14:09,095 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 3030 flow [2024-11-28 04:14:09,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:09,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:14:09,095 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:09,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-28 04:14:09,095 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:14:09,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2032262389, now seen corresponding path program 7 times [2024-11-28 04:14:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:09,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027574535] [2024-11-28 04:14:09,096 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:14:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:14:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:14:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:14:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027574535] [2024-11-28 04:14:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027574535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:14:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565093218] [2024-11-28 04:14:10,387 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:14:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:14:10,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:14:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:14:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:14:10,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:14:10,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:14:10,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 04:14:11,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:14:11,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 04:14:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:14:11,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:14:12,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:14:12,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 04:14:13,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:14:13,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 182 [2024-11-28 04:14:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:14:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565093218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:14:14,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:14:14,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-28 04:14:14,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414331526] [2024-11-28 04:14:14,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:14:14,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:14:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:14,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:14:14,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:14:16,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:14:16,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 3030 flow. Second operand has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:16,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:14:16,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:14:16,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:14:24,869 INFO L124 PetriNetUnfolderBase]: 13411/20007 cut-off events. [2024-11-28 04:14:24,870 INFO L125 PetriNetUnfolderBase]: For 202690/205812 co-relation queries the response was YES. [2024-11-28 04:14:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113553 conditions, 20007 events. 13411/20007 cut-off events. For 202690/205812 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 122614 event pairs, 5220 based on Foata normal form. 251/19423 useless extension candidates. Maximal degree in co-relation 113496. Up to 16255 conditions per place. [2024-11-28 04:14:25,080 INFO L140 encePairwiseOnDemand]: 39/55 looper letters, 248 selfloop transitions, 147 changer transitions 62/462 dead transitions. [2024-11-28 04:14:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 462 transitions, 6198 flow [2024-11-28 04:14:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:14:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 04:14:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 490 transitions. [2024-11-28 04:14:25,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-28 04:14:25,082 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 3030 flow. Second operand 28 states and 490 transitions. [2024-11-28 04:14:25,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 462 transitions, 6198 flow [2024-11-28 04:14:25,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 462 transitions, 5837 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-11-28 04:14:25,745 INFO L231 Difference]: Finished difference. Result has 247 places, 274 transitions, 3507 flow [2024-11-28 04:14:25,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3507, PETRI_PLACES=247, PETRI_TRANSITIONS=274} [2024-11-28 04:14:25,746 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 191 predicate places. [2024-11-28 04:14:25,746 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 274 transitions, 3507 flow [2024-11-28 04:14:25,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:25,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:14:25,747 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:25,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:14:25,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:25,947 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:14:25,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120397, now seen corresponding path program 3 times [2024-11-28 04:14:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029316498] [2024-11-28 04:14:25,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:14:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:25,966 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:14:25,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:14:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:14:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:14:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029316498] [2024-11-28 04:14:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029316498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:14:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406105732] [2024-11-28 04:14:26,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:14:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:14:26,457 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:14:26,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:14:26,571 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:14:26,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:14:26,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:14:26,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:14:26,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:14:26,836 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:14:26,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:14:26,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 04:14:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:14:27,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:14:28,963 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 72 treesize of output 68 [2024-11-28 04:14:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:14:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406105732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:14:29,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:14:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-28 04:14:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685451182] [2024-11-28 04:14:29,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:14:29,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:14:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:29,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:14:29,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:14:31,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:14:31,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 274 transitions, 3507 flow. Second operand has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:31,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:14:31,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:14:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:14:37,353 INFO L124 PetriNetUnfolderBase]: 12193/18292 cut-off events. [2024-11-28 04:14:37,353 INFO L125 PetriNetUnfolderBase]: For 188783/190951 co-relation queries the response was YES. [2024-11-28 04:14:37,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107485 conditions, 18292 events. 12193/18292 cut-off events. For 188783/190951 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 114625 event pairs, 2333 based on Foata normal form. 416/18571 useless extension candidates. Maximal degree in co-relation 107426. Up to 5936 conditions per place. [2024-11-28 04:14:37,618 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 372 selfloop transitions, 44 changer transitions 0/426 dead transitions. [2024-11-28 04:14:37,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 426 transitions, 6031 flow [2024-11-28 04:14:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:14:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 04:14:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-11-28 04:14:37,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3373737373737374 [2024-11-28 04:14:37,620 INFO L175 Difference]: Start difference. First operand has 247 places, 274 transitions, 3507 flow. Second operand 9 states and 167 transitions. [2024-11-28 04:14:37,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 426 transitions, 6031 flow [2024-11-28 04:14:38,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 426 transitions, 5259 flow, removed 169 selfloop flow, removed 24 redundant places. [2024-11-28 04:14:38,813 INFO L231 Difference]: Finished difference. Result has 202 places, 275 transitions, 3065 flow [2024-11-28 04:14:38,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3065, PETRI_PLACES=202, PETRI_TRANSITIONS=275} [2024-11-28 04:14:38,814 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-11-28 04:14:38,814 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 275 transitions, 3065 flow [2024-11-28 04:14:38,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:38,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:14:38,814 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:38,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 04:14:39,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:39,015 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:14:39,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120395, now seen corresponding path program 1 times [2024-11-28 04:14:39,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:39,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142416924] [2024-11-28 04:14:39,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:14:39,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:14:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 04:14:39,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:14:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142416924] [2024-11-28 04:14:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142416924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:14:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917638804] [2024-11-28 04:14:39,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:14:39,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:39,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:14:39,632 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:14:39,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:14:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:14:39,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:14:39,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:14:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:14:40,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:14:40,829 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 24 treesize of output 20 [2024-11-28 04:14:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:14:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917638804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:14:41,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:14:41,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2024-11-28 04:14:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933966212] [2024-11-28 04:14:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:14:41,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:14:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:41,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:14:41,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:14:42,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:14:42,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 275 transitions, 3065 flow. Second operand has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:14:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:14:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:14:53,245 INFO L124 PetriNetUnfolderBase]: 23285/34988 cut-off events. [2024-11-28 04:14:53,245 INFO L125 PetriNetUnfolderBase]: For 291422/293387 co-relation queries the response was YES. [2024-11-28 04:14:53,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194038 conditions, 34988 events. 23285/34988 cut-off events. For 291422/293387 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 241948 event pairs, 4451 based on Foata normal form. 485/35451 useless extension candidates. Maximal degree in co-relation 193991. Up to 9226 conditions per place. [2024-11-28 04:14:53,581 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 925 selfloop transitions, 93 changer transitions 0/1028 dead transitions. [2024-11-28 04:14:53,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1028 transitions, 12882 flow [2024-11-28 04:14:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:14:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 04:14:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 559 transitions. [2024-11-28 04:14:53,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37643097643097645 [2024-11-28 04:14:53,583 INFO L175 Difference]: Start difference. First operand has 202 places, 275 transitions, 3065 flow. Second operand 27 states and 559 transitions. [2024-11-28 04:14:53,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1028 transitions, 12882 flow [2024-11-28 04:14:55,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1028 transitions, 12732 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-28 04:14:55,560 INFO L231 Difference]: Finished difference. Result has 225 places, 312 transitions, 3751 flow [2024-11-28 04:14:55,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3751, PETRI_PLACES=225, PETRI_TRANSITIONS=312} [2024-11-28 04:14:55,560 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-11-28 04:14:55,561 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 312 transitions, 3751 flow [2024-11-28 04:14:55,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:55,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:14:55,561 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:55,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 04:14:55,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 04:14:55,766 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:14:55,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash 848897785, now seen corresponding path program 8 times [2024-11-28 04:14:55,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:55,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510177979] [2024-11-28 04:14:55,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:14:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:55,779 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:14:55,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:14:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:14:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:14:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510177979] [2024-11-28 04:14:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510177979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:14:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615934464] [2024-11-28 04:14:55,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:14:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:14:55,981 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:14:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:14:56,116 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:14:56,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:14:56,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:14:56,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:14:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:14:56,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:14:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:14:56,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615934464] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:14:56,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:14:56,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-28 04:14:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407471999] [2024-11-28 04:14:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:14:56,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:14:56,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:56,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:14:56,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:14:56,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-28 04:14:56,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 312 transitions, 3751 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:14:56,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:14:56,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-28 04:14:56,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:15:03,110 INFO L124 PetriNetUnfolderBase]: 23041/34602 cut-off events. [2024-11-28 04:15:03,110 INFO L125 PetriNetUnfolderBase]: For 314198/316420 co-relation queries the response was YES. [2024-11-28 04:15:03,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189536 conditions, 34602 events. 23041/34602 cut-off events. For 314198/316420 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 238701 event pairs, 4309 based on Foata normal form. 1240/35839 useless extension candidates. Maximal degree in co-relation 189486. Up to 13082 conditions per place. [2024-11-28 04:15:03,456 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 358 selfloop transitions, 45 changer transitions 0/415 dead transitions. [2024-11-28 04:15:03,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 415 transitions, 5665 flow [2024-11-28 04:15:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:15:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:15:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-11-28 04:15:03,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36623376623376624 [2024-11-28 04:15:03,457 INFO L175 Difference]: Start difference. First operand has 225 places, 312 transitions, 3751 flow. Second operand 7 states and 141 transitions. [2024-11-28 04:15:03,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 415 transitions, 5665 flow [2024-11-28 04:15:05,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 415 transitions, 5572 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-11-28 04:15:05,508 INFO L231 Difference]: Finished difference. Result has 216 places, 305 transitions, 3672 flow [2024-11-28 04:15:05,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=216, PETRI_TRANSITIONS=305} [2024-11-28 04:15:05,509 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-11-28 04:15:05,509 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 305 transitions, 3672 flow [2024-11-28 04:15:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:15:05,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:15:05,509 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:15:05,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:15:05,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 04:15:05,709 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:15:05,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:15:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 172001111, now seen corresponding path program 9 times [2024-11-28 04:15:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:15:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892305157] [2024-11-28 04:15:05,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:15:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:15:05,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:15:05,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:05,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:15:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892305157] [2024-11-28 04:15:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892305157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:15:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879891751] [2024-11-28 04:15:05,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:15:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:15:05,973 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:15:05,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:15:06,102 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:15:06,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:06,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:15:06,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:15:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:06,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:15:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879891751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:15:06,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:15:06,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-11-28 04:15:06,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966287910] [2024-11-28 04:15:06,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:15:06,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:15:06,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:15:06,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:15:06,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:15:06,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:15:06,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 305 transitions, 3672 flow. Second operand has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:15:06,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:15:06,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:15:06,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:15:23,160 INFO L124 PetriNetUnfolderBase]: 53922/77344 cut-off events. [2024-11-28 04:15:23,160 INFO L125 PetriNetUnfolderBase]: For 633019/633019 co-relation queries the response was YES. [2024-11-28 04:15:23,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413764 conditions, 77344 events. 53922/77344 cut-off events. For 633019/633019 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 514568 event pairs, 2941 based on Foata normal form. 0/74264 useless extension candidates. Maximal degree in co-relation 413716. Up to 18731 conditions per place. [2024-11-28 04:15:24,196 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 713 selfloop transitions, 474 changer transitions 0/1188 dead transitions. [2024-11-28 04:15:24,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1188 transitions, 15119 flow [2024-11-28 04:15:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:15:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 04:15:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 605 transitions. [2024-11-28 04:15:24,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-11-28 04:15:24,198 INFO L175 Difference]: Start difference. First operand has 216 places, 305 transitions, 3672 flow. Second operand 34 states and 605 transitions. [2024-11-28 04:15:24,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1188 transitions, 15119 flow [2024-11-28 04:15:40,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1188 transitions, 14791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:15:40,211 INFO L231 Difference]: Finished difference. Result has 266 places, 720 transitions, 9793 flow [2024-11-28 04:15:40,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9793, PETRI_PLACES=266, PETRI_TRANSITIONS=720} [2024-11-28 04:15:40,212 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-11-28 04:15:40,212 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 720 transitions, 9793 flow [2024-11-28 04:15:40,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:15:40,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:15:40,213 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:15:40,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:15:40,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 04:15:40,413 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 04:15:40,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:15:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1021011937, now seen corresponding path program 10 times [2024-11-28 04:15:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:15:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338987815] [2024-11-28 04:15:40,414 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:15:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:15:40,426 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:15:40,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:15:40,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338987815] [2024-11-28 04:15:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338987815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:15:40,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229917273] [2024-11-28 04:15:40,659 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:15:40,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:15:40,664 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:15:40,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35dcf282-abd3-427e-9450-b89b3f838875/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:15:40,802 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:15:40,803 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:40,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:15:40,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:15:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:41,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:15:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:15:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229917273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:15:41,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:15:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-28 04:15:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995931903] [2024-11-28 04:15:41,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:15:41,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:15:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:15:41,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:15:41,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:15:41,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-28 04:15:41,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 720 transitions, 9793 flow. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:15:41,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:15:41,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-28 04:15:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand