./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.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_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/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_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/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_bb7231b6-de63-4c33-8992-35fcf8bdf610/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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:57:00,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:57:01,006 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:57:01,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:57:01,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:57:01,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:57:01,041 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:57:01,041 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:57:01,041 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:57:01,041 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:57:01,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:57:01,041 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:57:01,042 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:57:01,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:57:01,042 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:57:01,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:57:01,042 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:57:01,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:57:01,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:57:01,043 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:57:01,044 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:57:01,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:57:01,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:57:01,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:57:01,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:57:01,045 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_bb7231b6-de63-4c33-8992-35fcf8bdf610/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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-11-28 03:57:01,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:57:01,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:57:01,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:57:01,400 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:57:01,401 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:57:01,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-28 03:57:04,443 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/9a70afe32/6c337b6813c147eda2ece463c7afe2aa/FLAG9edd08498 [2024-11-28 03:57:04,676 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:57:04,677 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-28 03:57:04,687 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/9a70afe32/6c337b6813c147eda2ece463c7afe2aa/FLAG9edd08498 [2024-11-28 03:57:04,706 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/9a70afe32/6c337b6813c147eda2ece463c7afe2aa [2024-11-28 03:57:04,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:57:04,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:57:04,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:57:04,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:57:04,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:57:04,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:57:04" (1/1) ... [2024-11-28 03:57:04,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a377a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:04, skipping insertion in model container [2024-11-28 03:57:04,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:57:04" (1/1) ... [2024-11-28 03:57:04,745 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:57:05,033 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 03:57:05,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:57:05,057 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:57:05,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:57:05,152 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:57:05,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05 WrapperNode [2024-11-28 03:57:05,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:57:05,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:57:05,154 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:57:05,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:57:05,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,180 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,228 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-11-28 03:57:05,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:57:05,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:57:05,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:57:05,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:57:05,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,259 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,292 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 03:57:05,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,315 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:57:05,329 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:57:05,329 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:57:05,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:57:05,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (1/1) ... [2024-11-28 03:57:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:57:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:05,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:57:05,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:57:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:57:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:57:05,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:57:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:57:05,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:57:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:57:05,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:57:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:57:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:57:05,425 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 03:57:05,575 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:57:05,579 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:57:06,385 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:57:06,386 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:57:07,105 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:57:07,109 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 03:57:07,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:57:07 BoogieIcfgContainer [2024-11-28 03:57:07,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:57:07,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:57:07,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:57:07,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:57:07,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:57:04" (1/3) ... [2024-11-28 03:57:07,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e599d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:57:07, skipping insertion in model container [2024-11-28 03:57:07,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:57:05" (2/3) ... [2024-11-28 03:57:07,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e599d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:57:07, skipping insertion in model container [2024-11-28 03:57:07,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:57:07" (3/3) ... [2024-11-28 03:57:07,123 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-11-28 03:57:07,145 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:57:07,147 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 67 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2024-11-28 03:57:07,147 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:57:07,278 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:57:07,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-11-28 03:57:07,408 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-11-28 03:57:07,414 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:57:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-11-28 03:57:07,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-11-28 03:57:07,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-11-28 03:57:07,448 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:57:07,474 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;@45b3d9f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:57:07,474 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-28 03:57:07,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:57:07,481 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:57:07,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:57:07,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:07,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:57:07,483 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:07,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1033132, now seen corresponding path program 1 times [2024-11-28 03:57:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:07,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153342700] [2024-11-28 03:57:07,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:07,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:07,882 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 03:57:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153342700] [2024-11-28 03:57:07,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153342700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:07,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:07,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:57:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690194964] [2024-11-28 03:57:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:07,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:07,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:07,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:07,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:07,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:57:07,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:07,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:07,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:10,966 INFO L124 PetriNetUnfolderBase]: 11258/15925 cut-off events. [2024-11-28 03:57:10,966 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2024-11-28 03:57:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32375 conditions, 15925 events. 11258/15925 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 90658 event pairs, 10184 based on Foata normal form. 1/9499 useless extension candidates. Maximal degree in co-relation 31435. Up to 15894 conditions per place. [2024-11-28 03:57:11,107 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-28 03:57:11,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-11-28 03:57:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-28 03:57:11,124 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-28 03:57:11,127 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-11-28 03:57:11,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-11-28 03:57:11,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:57:11,148 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-28 03:57:11,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-28 03:57:11,157 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-28 03:57:11,160 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-28 03:57:11,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:57:11,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:11,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:57:11,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:57:11,161 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:11,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1033133, now seen corresponding path program 1 times [2024-11-28 03:57:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276588486] [2024-11-28 03:57:11,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:11,690 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 03:57:11,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276588486] [2024-11-28 03:57:11,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276588486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:11,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471219724] [2024-11-28 03:57:11,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:11,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:11,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:11,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:11,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:11,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 03:57:11,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:11,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:11,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:13,962 INFO L124 PetriNetUnfolderBase]: 11258/15922 cut-off events. [2024-11-28 03:57:13,963 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-28 03:57:13,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32034 conditions, 15922 events. 11258/15922 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 90567 event pairs, 10184 based on Foata normal form. 0/9496 useless extension candidates. Maximal degree in co-relation 32009. Up to 15894 conditions per place. [2024-11-28 03:57:14,045 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-11-28 03:57:14,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 242 flow [2024-11-28 03:57:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-28 03:57:14,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2024-11-28 03:57:14,047 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 103 transitions. [2024-11-28 03:57:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 242 flow [2024-11-28 03:57:14,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:14,051 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 142 flow [2024-11-28 03:57:14,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-28 03:57:14,053 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2024-11-28 03:57:14,053 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 142 flow [2024-11-28 03:57:14,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 03:57:14,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:14,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:14,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:57:14,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:14,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1633281568, now seen corresponding path program 1 times [2024-11-28 03:57:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:14,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9828493] [2024-11-28 03:57:14,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:14,278 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 03:57:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:14,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9828493] [2024-11-28 03:57:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9828493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:14,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:57:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644909674] [2024-11-28 03:57:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:14,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:14,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:14,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:14,281 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:14,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 03:57:14,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:14,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:14,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:16,210 INFO L124 PetriNetUnfolderBase]: 13080/18544 cut-off events. [2024-11-28 03:57:16,211 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-11-28 03:57:16,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37310 conditions, 18544 events. 13080/18544 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 107424 event pairs, 4436 based on Foata normal form. 162/11398 useless extension candidates. Maximal degree in co-relation 37279. Up to 15883 conditions per place. [2024-11-28 03:57:16,297 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 81 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-11-28 03:57:16,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 370 flow [2024-11-28 03:57:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-28 03:57:16,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-11-28 03:57:16,303 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 142 flow. Second operand 3 states and 129 transitions. [2024-11-28 03:57:16,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 370 flow [2024-11-28 03:57:16,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:57:16,307 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 149 flow [2024-11-28 03:57:16,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-11-28 03:57:16,310 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2024-11-28 03:57:16,310 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 149 flow [2024-11-28 03:57:16,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 03:57:16,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:16,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:16,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:57:16,311 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:16,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1703037814, now seen corresponding path program 1 times [2024-11-28 03:57:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:16,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360017523] [2024-11-28 03:57:16,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:16,492 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 03:57:16,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360017523] [2024-11-28 03:57:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360017523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154029077] [2024-11-28 03:57:16,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:16,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:16,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:16,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:16,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:16,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:57:16,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:16,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:16,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:18,190 INFO L124 PetriNetUnfolderBase]: 12327/17508 cut-off events. [2024-11-28 03:57:18,190 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2024-11-28 03:57:18,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36908 conditions, 17508 events. 12327/17508 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 96038 event pairs, 4948 based on Foata normal form. 297/11619 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2024-11-28 03:57:18,278 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-11-28 03:57:18,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 385 flow [2024-11-28 03:57:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-28 03:57:18,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-28 03:57:18,280 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 149 flow. Second operand 3 states and 130 transitions. [2024-11-28 03:57:18,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 385 flow [2024-11-28 03:57:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:18,283 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 158 flow [2024-11-28 03:57:18,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-28 03:57:18,284 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-28 03:57:18,285 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 158 flow [2024-11-28 03:57:18,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:57:18,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:18,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:18,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:57:18,285 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:18,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2142833305, now seen corresponding path program 1 times [2024-11-28 03:57:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010593401] [2024-11-28 03:57:18,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:18,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:18,510 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 03:57:18,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:18,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010593401] [2024-11-28 03:57:18,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010593401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:18,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:18,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:18,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922318557] [2024-11-28 03:57:18,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:18,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:18,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:18,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:18,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:18,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:18,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:57:18,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:18,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:18,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:19,981 INFO L124 PetriNetUnfolderBase]: 12939/18485 cut-off events. [2024-11-28 03:57:19,981 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-11-28 03:57:19,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40235 conditions, 18485 events. 12939/18485 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 102899 event pairs, 11912 based on Foata normal form. 112/12543 useless extension candidates. Maximal degree in co-relation 12447. Up to 17493 conditions per place. [2024-11-28 03:57:20,052 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 81 selfloop transitions, 9 changer transitions 3/97 dead transitions. [2024-11-28 03:57:20,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 420 flow [2024-11-28 03:57:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:57:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:57:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-28 03:57:20,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43733333333333335 [2024-11-28 03:57:20,054 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 158 flow. Second operand 5 states and 164 transitions. [2024-11-28 03:57:20,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 420 flow [2024-11-28 03:57:20,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:20,060 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 228 flow [2024-11-28 03:57:20,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-28 03:57:20,061 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2024-11-28 03:57:20,061 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 228 flow [2024-11-28 03:57:20,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:57:20,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:20,062 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:20,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:57:20,062 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:20,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash -368365179, now seen corresponding path program 1 times [2024-11-28 03:57:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:20,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828812955] [2024-11-28 03:57:20,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:20,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:20,889 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 03:57:20,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828812955] [2024-11-28 03:57:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828812955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658211030] [2024-11-28 03:57:20,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:20,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:20,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:20,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:57:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:21,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:57:21,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:21,109 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 03:57:21,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:57:21,212 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 03:57:21,247 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 03:57:21,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 03:57:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:57:21,296 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 03:57:21,307 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:57:21,307 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 03:57:21,399 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 03:57:21,399 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:57:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658211030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:57:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-28 03:57:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605096586] [2024-11-28 03:57:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:21,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:57:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:21,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:57:21,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:57:21,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:21,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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 03:57:21,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:21,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:21,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:22,697 INFO L124 PetriNetUnfolderBase]: 7303/10533 cut-off events. [2024-11-28 03:57:22,698 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2024-11-28 03:57:22,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22809 conditions, 10533 events. 7303/10533 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 55278 event pairs, 6640 based on Foata normal form. 568/8300 useless extension candidates. Maximal degree in co-relation 20805. Up to 10498 conditions per place. [2024-11-28 03:57:22,759 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 55 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-11-28 03:57:22,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 320 flow [2024-11-28 03:57:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-28 03:57:22,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-28 03:57:22,762 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 228 flow. Second operand 4 states and 100 transitions. [2024-11-28 03:57:22,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 320 flow [2024-11-28 03:57:22,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:22,765 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 208 flow [2024-11-28 03:57:22,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-28 03:57:22,767 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-28 03:57:22,767 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 208 flow [2024-11-28 03:57:22,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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 03:57:22,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:22,767 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:22,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:57:22,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 03:57:22,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:22,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1465582463, now seen corresponding path program 1 times [2024-11-28 03:57:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334109926] [2024-11-28 03:57:22,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:23,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:23,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334109926] [2024-11-28 03:57:23,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334109926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:23,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:23,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:23,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036184786] [2024-11-28 03:57:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:23,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:23,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:23,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:23,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:23,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 03:57:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:23,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:23,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:23,906 INFO L124 PetriNetUnfolderBase]: 5967/8664 cut-off events. [2024-11-28 03:57:23,906 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2024-11-28 03:57:23,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18880 conditions, 8664 events. 5967/8664 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43053 event pairs, 2918 based on Foata normal form. 158/6478 useless extension candidates. Maximal degree in co-relation 16866. Up to 6301 conditions per place. [2024-11-28 03:57:23,951 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-11-28 03:57:23,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 449 flow [2024-11-28 03:57:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-28 03:57:23,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-11-28 03:57:23,953 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 208 flow. Second operand 3 states and 123 transitions. [2024-11-28 03:57:23,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 449 flow [2024-11-28 03:57:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:23,958 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 220 flow [2024-11-28 03:57:23,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-11-28 03:57:23,959 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2024-11-28 03:57:23,959 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 220 flow [2024-11-28 03:57:23,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 03:57:23,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:23,959 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] [2024-11-28 03:57:23,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:57:23,959 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:23,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1984115863, now seen corresponding path program 1 times [2024-11-28 03:57:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:23,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950513760] [2024-11-28 03:57:23,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:23,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950513760] [2024-11-28 03:57:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950513760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:24,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:24,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:57:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221567858] [2024-11-28 03:57:24,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:24,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:24,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:24,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:24,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:24,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 03:57:24,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:24,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:24,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:25,072 INFO L124 PetriNetUnfolderBase]: 5126/7477 cut-off events. [2024-11-28 03:57:25,072 INFO L125 PetriNetUnfolderBase]: For 875/875 co-relation queries the response was YES. [2024-11-28 03:57:25,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16893 conditions, 7477 events. 5126/7477 cut-off events. For 875/875 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 37269 event pairs, 4614 based on Foata normal form. 0/5848 useless extension candidates. Maximal degree in co-relation 14878. Up to 7428 conditions per place. [2024-11-28 03:57:25,110 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 54 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-11-28 03:57:25,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 328 flow [2024-11-28 03:57:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-28 03:57:25,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2024-11-28 03:57:25,112 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 220 flow. Second operand 4 states and 92 transitions. [2024-11-28 03:57:25,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 328 flow [2024-11-28 03:57:25,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:25,116 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 218 flow [2024-11-28 03:57:25,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-11-28 03:57:25,119 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2024-11-28 03:57:25,119 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 218 flow [2024-11-28 03:57:25,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 03:57:25,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:25,120 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] [2024-11-28 03:57:25,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:57:25,121 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:25,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1984115862, now seen corresponding path program 1 times [2024-11-28 03:57:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:25,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551579150] [2024-11-28 03:57:25,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:25,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551579150] [2024-11-28 03:57:25,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551579150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:25,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:25,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:57:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486894051] [2024-11-28 03:57:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:25,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:25,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:25,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:25,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:25,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:25,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:25,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:25,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:26,388 INFO L124 PetriNetUnfolderBase]: 6470/9607 cut-off events. [2024-11-28 03:57:26,388 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2024-11-28 03:57:26,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21308 conditions, 9607 events. 6470/9607 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 50954 event pairs, 5958 based on Foata normal form. 20/7608 useless extension candidates. Maximal degree in co-relation 17337. Up to 7434 conditions per place. [2024-11-28 03:57:26,429 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 73 selfloop transitions, 12 changer transitions 5/94 dead transitions. [2024-11-28 03:57:26,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 498 flow [2024-11-28 03:57:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:57:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:57:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-28 03:57:26,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4026666666666667 [2024-11-28 03:57:26,431 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 218 flow. Second operand 5 states and 151 transitions. [2024-11-28 03:57:26,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 498 flow [2024-11-28 03:57:26,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:26,435 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 302 flow [2024-11-28 03:57:26,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-28 03:57:26,436 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2024-11-28 03:57:26,436 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 302 flow [2024-11-28 03:57:26,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:26,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:26,437 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] [2024-11-28 03:57:26,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:57:26,437 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:26,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1103424321, now seen corresponding path program 1 times [2024-11-28 03:57:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:26,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080625248] [2024-11-28 03:57:26,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080625248] [2024-11-28 03:57:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080625248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751454843] [2024-11-28 03:57:26,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:26,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:26,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:26,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:57:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:27,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:57:27,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:27,285 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:57:27,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751454843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:27,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:57:27,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-28 03:57:27,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838257162] [2024-11-28 03:57:27,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:27,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:57:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:27,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:57:27,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:57:27,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:27,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 03:57:27,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:27,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:27,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:28,010 INFO L124 PetriNetUnfolderBase]: 5709/8532 cut-off events. [2024-11-28 03:57:28,011 INFO L125 PetriNetUnfolderBase]: For 1011/1011 co-relation queries the response was YES. [2024-11-28 03:57:28,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18779 conditions, 8532 events. 5709/8532 cut-off events. For 1011/1011 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 45197 event pairs, 5266 based on Foata normal form. 122/6970 useless extension candidates. Maximal degree in co-relation 14788. Up to 8448 conditions per place. [2024-11-28 03:57:28,042 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 52 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-11-28 03:57:28,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 416 flow [2024-11-28 03:57:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-28 03:57:28,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-28 03:57:28,043 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 302 flow. Second operand 4 states and 102 transitions. [2024-11-28 03:57:28,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 416 flow [2024-11-28 03:57:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:28,047 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 309 flow [2024-11-28 03:57:28,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=309, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-11-28 03:57:28,048 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2024-11-28 03:57:28,048 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 309 flow [2024-11-28 03:57:28,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 03:57:28,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:28,048 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 03:57:28,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:28,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:57:28,253 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:28,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -466114492, now seen corresponding path program 1 times [2024-11-28 03:57:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907477878] [2024-11-28 03:57:28,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:28,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907477878] [2024-11-28 03:57:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907477878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:28,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:28,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:57:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747876991] [2024-11-28 03:57:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:28,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:28,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:28,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:28,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:28,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 03:57:28,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:28,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:29,517 INFO L124 PetriNetUnfolderBase]: 8435/12854 cut-off events. [2024-11-28 03:57:29,517 INFO L125 PetriNetUnfolderBase]: For 1147/1147 co-relation queries the response was YES. [2024-11-28 03:57:29,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27806 conditions, 12854 events. 8435/12854 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76118 event pairs, 7988 based on Foata normal form. 28/10416 useless extension candidates. Maximal degree in co-relation 19888. Up to 8465 conditions per place. [2024-11-28 03:57:29,562 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 81 selfloop transitions, 11 changer transitions 9/105 dead transitions. [2024-11-28 03:57:29,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 668 flow [2024-11-28 03:57:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:57:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:57:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-11-28 03:57:29,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4186666666666667 [2024-11-28 03:57:29,564 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 309 flow. Second operand 5 states and 157 transitions. [2024-11-28 03:57:29,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 668 flow [2024-11-28 03:57:29,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:29,569 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 380 flow [2024-11-28 03:57:29,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-28 03:57:29,570 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-28 03:57:29,570 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 380 flow [2024-11-28 03:57:29,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 03:57:29,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:29,570 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] [2024-11-28 03:57:29,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:57:29,571 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:29,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1757141399, now seen corresponding path program 1 times [2024-11-28 03:57:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179941059] [2024-11-28 03:57:29,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:57:29,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179941059] [2024-11-28 03:57:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179941059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:29,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:29,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:57:29,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049597883] [2024-11-28 03:57:29,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:29,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:29,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:29,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:29,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:29,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:29,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 03:57:29,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:29,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:29,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:31,302 INFO L124 PetriNetUnfolderBase]: 12987/19408 cut-off events. [2024-11-28 03:57:31,302 INFO L125 PetriNetUnfolderBase]: For 2859/2859 co-relation queries the response was YES. [2024-11-28 03:57:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43720 conditions, 19408 events. 12987/19408 cut-off events. For 2859/2859 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 109956 event pairs, 8638 based on Foata normal form. 216/15677 useless extension candidates. Maximal degree in co-relation 35790. Up to 11138 conditions per place. [2024-11-28 03:57:31,363 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 115 selfloop transitions, 8 changer transitions 0/127 dead transitions. [2024-11-28 03:57:31,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 127 transitions, 798 flow [2024-11-28 03:57:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-28 03:57:31,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-11-28 03:57:31,365 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 380 flow. Second operand 4 states and 158 transitions. [2024-11-28 03:57:31,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 127 transitions, 798 flow [2024-11-28 03:57:31,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 127 transitions, 789 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:31,369 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 434 flow [2024-11-28 03:57:31,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-28 03:57:31,370 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-28 03:57:31,370 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 434 flow [2024-11-28 03:57:31,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 03:57:31,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:31,370 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 03:57:31,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:57:31,370 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:31,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1003792810, now seen corresponding path program 1 times [2024-11-28 03:57:31,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:31,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240008909] [2024-11-28 03:57:31,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:31,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:31,460 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 03:57:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240008909] [2024-11-28 03:57:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240008909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:31,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:31,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186682007] [2024-11-28 03:57:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:31,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:31,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:31,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:31,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:31,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 03:57:31,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:31,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:31,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:33,022 INFO L124 PetriNetUnfolderBase]: 12987/19392 cut-off events. [2024-11-28 03:57:33,022 INFO L125 PetriNetUnfolderBase]: For 6796/6796 co-relation queries the response was YES. [2024-11-28 03:57:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46622 conditions, 19392 events. 12987/19392 cut-off events. For 6796/6796 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 109838 event pairs, 10339 based on Foata normal form. 8/15453 useless extension candidates. Maximal degree in co-relation 38704. Up to 10967 conditions per place. [2024-11-28 03:57:33,092 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 62 selfloop transitions, 2 changer transitions 24/92 dead transitions. [2024-11-28 03:57:33,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 653 flow [2024-11-28 03:57:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-28 03:57:33,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-28 03:57:33,093 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 434 flow. Second operand 3 states and 105 transitions. [2024-11-28 03:57:33,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 653 flow [2024-11-28 03:57:33,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 645 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-28 03:57:33,101 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 288 flow [2024-11-28 03:57:33,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-11-28 03:57:33,102 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-11-28 03:57:33,102 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 288 flow [2024-11-28 03:57:33,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 03:57:33,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:33,102 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, 1] [2024-11-28 03:57:33,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:57:33,103 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:33,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash -25347422, now seen corresponding path program 1 times [2024-11-28 03:57:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:33,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198928715] [2024-11-28 03:57:33,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:33,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198928715] [2024-11-28 03:57:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198928715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661225973] [2024-11-28 03:57:33,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:33,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:33,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:57:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:33,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:33,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:33,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:33,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661225973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:33,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:33,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-28 03:57:33,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840718791] [2024-11-28 03:57:33,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:33,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:57:33,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:33,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:57:33,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:57:33,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:33,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 288 flow. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 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 03:57:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:35,380 INFO L124 PetriNetUnfolderBase]: 9025/13102 cut-off events. [2024-11-28 03:57:35,380 INFO L125 PetriNetUnfolderBase]: For 5680/5680 co-relation queries the response was YES. [2024-11-28 03:57:35,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32990 conditions, 13102 events. 9025/13102 cut-off events. For 5680/5680 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 65650 event pairs, 7859 based on Foata normal form. 2/10395 useless extension candidates. Maximal degree in co-relation 30221. Up to 11885 conditions per place. [2024-11-28 03:57:35,441 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 49 selfloop transitions, 11 changer transitions 50/114 dead transitions. [2024-11-28 03:57:35,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 690 flow [2024-11-28 03:57:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:57:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:57:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-11-28 03:57:35,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.316 [2024-11-28 03:57:35,443 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 288 flow. Second operand 10 states and 237 transitions. [2024-11-28 03:57:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 690 flow [2024-11-28 03:57:35,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 623 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-11-28 03:57:35,462 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 300 flow [2024-11-28 03:57:35,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=85, PETRI_TRANSITIONS=63} [2024-11-28 03:57:35,463 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2024-11-28 03:57:35,463 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 300 flow [2024-11-28 03:57:35,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 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 03:57:35,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:35,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:35,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:57:35,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:35,664 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:35,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 980912511, now seen corresponding path program 2 times [2024-11-28 03:57:35,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:35,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588417191] [2024-11-28 03:57:35,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:35,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:35,730 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:57:35,734 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588417191] [2024-11-28 03:57:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588417191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:36,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:36,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:57:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273216195] [2024-11-28 03:57:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:36,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:36,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:36,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:36,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:36,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 63 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 03:57:36,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:36,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:36,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:37,448 INFO L124 PetriNetUnfolderBase]: 6674/9641 cut-off events. [2024-11-28 03:57:37,448 INFO L125 PetriNetUnfolderBase]: For 4789/4789 co-relation queries the response was YES. [2024-11-28 03:57:37,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24092 conditions, 9641 events. 6674/9641 cut-off events. For 4789/4789 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 46265 event pairs, 5798 based on Foata normal form. 0/8064 useless extension candidates. Maximal degree in co-relation 24032. Up to 9613 conditions per place. [2024-11-28 03:57:37,493 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 55 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-28 03:57:37,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 61 transitions, 408 flow [2024-11-28 03:57:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-28 03:57:37,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29333333333333333 [2024-11-28 03:57:37,494 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 300 flow. Second operand 4 states and 88 transitions. [2024-11-28 03:57:37,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 61 transitions, 408 flow [2024-11-28 03:57:37,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 61 transitions, 394 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-28 03:57:37,503 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 284 flow [2024-11-28 03:57:37,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-11-28 03:57:37,503 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-28 03:57:37,503 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 284 flow [2024-11-28 03:57:37,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 03:57:37,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:37,504 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:37,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:57:37,504 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:37,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 980912510, now seen corresponding path program 1 times [2024-11-28 03:57:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768535802] [2024-11-28 03:57:37,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:37,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768535802] [2024-11-28 03:57:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768535802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:37,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:57:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459005671] [2024-11-28 03:57:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:37,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:57:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:37,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:57:37,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:57:37,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 03:57:37,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 03:57:37,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:37,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 03:57:37,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:38,782 INFO L124 PetriNetUnfolderBase]: 5255/7625 cut-off events. [2024-11-28 03:57:38,782 INFO L125 PetriNetUnfolderBase]: For 3344/3344 co-relation queries the response was YES. [2024-11-28 03:57:38,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18863 conditions, 7625 events. 5255/7625 cut-off events. For 3344/3344 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 35729 event pairs, 4517 based on Foata normal form. 252/6816 useless extension candidates. Maximal degree in co-relation 18808. Up to 7592 conditions per place. [2024-11-28 03:57:38,819 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 52 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-28 03:57:38,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 388 flow [2024-11-28 03:57:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:57:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:57:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-28 03:57:38,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25866666666666666 [2024-11-28 03:57:38,821 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 284 flow. Second operand 5 states and 97 transitions. [2024-11-28 03:57:38,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 388 flow [2024-11-28 03:57:38,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 59 transitions, 381 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:57:38,825 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 277 flow [2024-11-28 03:57:38,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-11-28 03:57:38,826 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-28 03:57:38,826 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 277 flow [2024-11-28 03:57:38,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 03:57:38,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:38,826 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:38,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:57:38,827 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:38,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1527209750, now seen corresponding path program 1 times [2024-11-28 03:57:38,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:38,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486163669] [2024-11-28 03:57:38,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:39,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:39,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486163669] [2024-11-28 03:57:39,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486163669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:39,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197768563] [2024-11-28 03:57:39,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:39,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:39,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:39,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:57:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:39,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:39,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:39,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197768563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:39,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:39,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:57:39,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060397357] [2024-11-28 03:57:39,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:39,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:57:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:39,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:57:39,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:57:39,680 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:39,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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 03:57:39,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:39,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:39,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:41,198 INFO L124 PetriNetUnfolderBase]: 6488/9666 cut-off events. [2024-11-28 03:57:41,198 INFO L125 PetriNetUnfolderBase]: For 4230/4230 co-relation queries the response was YES. [2024-11-28 03:57:41,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23639 conditions, 9666 events. 6488/9666 cut-off events. For 4230/4230 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 48680 event pairs, 5339 based on Foata normal form. 345/8645 useless extension candidates. Maximal degree in co-relation 23587. Up to 7598 conditions per place. [2024-11-28 03:57:41,243 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 46 selfloop transitions, 13 changer transitions 57/120 dead transitions. [2024-11-28 03:57:41,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 756 flow [2024-11-28 03:57:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:57:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:57:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-11-28 03:57:41,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2966666666666667 [2024-11-28 03:57:41,245 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 277 flow. Second operand 12 states and 267 transitions. [2024-11-28 03:57:41,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 756 flow [2024-11-28 03:57:41,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 748 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:57:41,252 INFO L231 Difference]: Finished difference. Result has 87 places, 61 transitions, 329 flow [2024-11-28 03:57:41,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=329, PETRI_PLACES=87, PETRI_TRANSITIONS=61} [2024-11-28 03:57:41,253 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-28 03:57:41,253 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 61 transitions, 329 flow [2024-11-28 03:57:41,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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 03:57:41,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:41,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:41,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:57:41,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:41,458 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:41,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash 639435793, now seen corresponding path program 2 times [2024-11-28 03:57:41,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:41,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832166539] [2024-11-28 03:57:41,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:41,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:41,571 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:57:41,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:57:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832166539] [2024-11-28 03:57:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832166539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:43,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:43,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:57:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890251736] [2024-11-28 03:57:43,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:43,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:57:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:43,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:57:43,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:57:43,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:43,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 61 transitions, 329 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 03:57:43,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:43,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:44,655 INFO L124 PetriNetUnfolderBase]: 6147/8912 cut-off events. [2024-11-28 03:57:44,656 INFO L125 PetriNetUnfolderBase]: For 4618/4618 co-relation queries the response was YES. [2024-11-28 03:57:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22523 conditions, 8912 events. 6147/8912 cut-off events. For 4618/4618 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 41456 event pairs, 2118 based on Foata normal form. 1/7649 useless extension candidates. Maximal degree in co-relation 22462. Up to 6518 conditions per place. [2024-11-28 03:57:44,703 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 106 selfloop transitions, 15 changer transitions 18/143 dead transitions. [2024-11-28 03:57:44,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 143 transitions, 825 flow [2024-11-28 03:57:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:57:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:57:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-11-28 03:57:44,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3546666666666667 [2024-11-28 03:57:44,706 INFO L175 Difference]: Start difference. First operand has 87 places, 61 transitions, 329 flow. Second operand 10 states and 266 transitions. [2024-11-28 03:57:44,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 143 transitions, 825 flow [2024-11-28 03:57:44,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 143 transitions, 771 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-11-28 03:57:44,715 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 391 flow [2024-11-28 03:57:44,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-11-28 03:57:44,716 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-28 03:57:44,716 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 391 flow [2024-11-28 03:57:44,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 03:57:44,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:44,716 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:44,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 03:57:44,717 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:44,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:44,717 INFO L85 PathProgramCache]: Analyzing trace with hash -216656362, now seen corresponding path program 3 times [2024-11-28 03:57:44,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:44,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390732693] [2024-11-28 03:57:44,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:44,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:44,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:57:44,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:57:44,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:44,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390732693] [2024-11-28 03:57:44,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390732693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:44,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:44,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:57:44,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954051599] [2024-11-28 03:57:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:44,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:44,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:44,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:57:44,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:44,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 03:57:44,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:44,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:44,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:47,140 INFO L124 PetriNetUnfolderBase]: 14518/20942 cut-off events. [2024-11-28 03:57:47,140 INFO L125 PetriNetUnfolderBase]: For 15092/15092 co-relation queries the response was YES. [2024-11-28 03:57:47,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54529 conditions, 20942 events. 14518/20942 cut-off events. For 15092/15092 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 107009 event pairs, 6389 based on Foata normal form. 298/18337 useless extension candidates. Maximal degree in co-relation 54477. Up to 8311 conditions per place. [2024-11-28 03:57:47,255 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 121 selfloop transitions, 7 changer transitions 0/132 dead transitions. [2024-11-28 03:57:47,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 132 transitions, 900 flow [2024-11-28 03:57:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-11-28 03:57:47,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-28 03:57:47,256 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 391 flow. Second operand 4 states and 146 transitions. [2024-11-28 03:57:47,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 132 transitions, 900 flow [2024-11-28 03:57:47,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 880 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:47,273 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 410 flow [2024-11-28 03:57:47,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=410, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2024-11-28 03:57:47,274 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2024-11-28 03:57:47,274 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 410 flow [2024-11-28 03:57:47,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 03:57:47,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:47,274 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:47,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:57:47,274 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:47,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -487749214, now seen corresponding path program 4 times [2024-11-28 03:57:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733613032] [2024-11-28 03:57:47,275 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:57:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:47,317 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:57:47,317 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:47,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733613032] [2024-11-28 03:57:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733613032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265563174] [2024-11-28 03:57:47,552 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:57:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:47,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:47,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:57:47,742 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:57:47,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:47,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:57:47,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:48,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:57:48,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265563174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:48,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:48,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-28 03:57:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490918182] [2024-11-28 03:57:48,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:48,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:57:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:48,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:57:48,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:57:48,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:48,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 410 flow. Second operand has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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 03:57:48,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:48,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:48,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:50,958 INFO L124 PetriNetUnfolderBase]: 16077/23373 cut-off events. [2024-11-28 03:57:50,958 INFO L125 PetriNetUnfolderBase]: For 22527/22527 co-relation queries the response was YES. [2024-11-28 03:57:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62533 conditions, 23373 events. 16077/23373 cut-off events. For 22527/22527 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 125968 event pairs, 13613 based on Foata normal form. 137/20190 useless extension candidates. Maximal degree in co-relation 56826. Up to 20911 conditions per place. [2024-11-28 03:57:51,081 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 59 selfloop transitions, 14 changer transitions 74/151 dead transitions. [2024-11-28 03:57:51,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 1015 flow [2024-11-28 03:57:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:57:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:57:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-11-28 03:57:51,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32242424242424245 [2024-11-28 03:57:51,083 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 410 flow. Second operand 11 states and 266 transitions. [2024-11-28 03:57:51,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 1015 flow [2024-11-28 03:57:51,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 1009 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-28 03:57:51,104 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 474 flow [2024-11-28 03:57:51,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=474, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2024-11-28 03:57:51,105 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 34 predicate places. [2024-11-28 03:57:51,105 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 474 flow [2024-11-28 03:57:51,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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 03:57:51,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:51,105 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:51,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:51,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:51,306 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:51,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1507015549, now seen corresponding path program 5 times [2024-11-28 03:57:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:51,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883593119] [2024-11-28 03:57:51,307 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:51,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:51,355 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 03:57:51,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 03:57:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883593119] [2024-11-28 03:57:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883593119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191527578] [2024-11-28 03:57:51,545 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:51,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:51,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:51,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:57:51,748 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 03:57:51,748 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:51,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:57:51,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 03:57:51,836 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:57:51,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191527578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:51,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:57:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-28 03:57:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021062169] [2024-11-28 03:57:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:51,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:57:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:51,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:57:51,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:57:51,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:51,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 03:57:51,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:51,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:51,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:52,302 INFO L124 PetriNetUnfolderBase]: 2344/3645 cut-off events. [2024-11-28 03:57:52,302 INFO L125 PetriNetUnfolderBase]: For 2672/2672 co-relation queries the response was YES. [2024-11-28 03:57:52,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8802 conditions, 3645 events. 2344/3645 cut-off events. For 2672/2672 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 15728 event pairs, 2305 based on Foata normal form. 164/3171 useless extension candidates. Maximal degree in co-relation 8724. Up to 3585 conditions per place. [2024-11-28 03:57:52,323 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 56 selfloop transitions, 5 changer transitions 2/67 dead transitions. [2024-11-28 03:57:52,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 67 transitions, 522 flow [2024-11-28 03:57:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:57:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:57:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-28 03:57:52,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-28 03:57:52,326 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 474 flow. Second operand 4 states and 102 transitions. [2024-11-28 03:57:52,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 67 transitions, 522 flow [2024-11-28 03:57:52,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 453 flow, removed 6 selfloop flow, removed 17 redundant places. [2024-11-28 03:57:52,337 INFO L231 Difference]: Finished difference. Result has 87 places, 62 transitions, 327 flow [2024-11-28 03:57:52,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2024-11-28 03:57:52,338 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-28 03:57:52,338 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 327 flow [2024-11-28 03:57:52,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 03:57:52,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:52,338 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2024-11-28 03:57:52,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:57:52,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:52,539 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:52,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1910978374, now seen corresponding path program 6 times [2024-11-28 03:57:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:52,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445869635] [2024-11-28 03:57:52,541 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:57:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:52,664 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:57:52,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:57:52,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445869635] [2024-11-28 03:57:52,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445869635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975482465] [2024-11-28 03:57:52,867 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:57:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:52,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:52,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:57:53,081 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:57:53,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:53,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:57:53,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 03:57:53,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 03:57:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975482465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:53,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:57:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174408512] [2024-11-28 03:57:53,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:53,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:57:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:53,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:57:53,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:57:53,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:53,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 327 flow. Second operand has 12 states, 12 states have (on average 21.833333333333332) internal successors, (262), 12 states have internal predecessors, (262), 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 03:57:53,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:53,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:53,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:54,368 INFO L124 PetriNetUnfolderBase]: 3884/6043 cut-off events. [2024-11-28 03:57:54,368 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2024-11-28 03:57:54,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13123 conditions, 6043 events. 3884/6043 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 29051 event pairs, 3667 based on Foata normal form. 10/4998 useless extension candidates. Maximal degree in co-relation 13059. Up to 3613 conditions per place. [2024-11-28 03:57:54,387 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 45 selfloop transitions, 18 changer transitions 53/120 dead transitions. [2024-11-28 03:57:54,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 760 flow [2024-11-28 03:57:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:57:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:57:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-11-28 03:57:54,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3011111111111111 [2024-11-28 03:57:54,389 INFO L175 Difference]: Start difference. First operand has 87 places, 62 transitions, 327 flow. Second operand 12 states and 271 transitions. [2024-11-28 03:57:54,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 760 flow [2024-11-28 03:57:54,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 750 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:54,394 INFO L231 Difference]: Finished difference. Result has 102 places, 65 transitions, 413 flow [2024-11-28 03:57:54,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=413, PETRI_PLACES=102, PETRI_TRANSITIONS=65} [2024-11-28 03:57:54,394 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 30 predicate places. [2024-11-28 03:57:54,394 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 65 transitions, 413 flow [2024-11-28 03:57:54,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.833333333333332) internal successors, (262), 12 states have internal predecessors, (262), 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 03:57:54,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:54,395 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-28 03:57:54,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:54,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:54,595 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:54,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash -922978417, now seen corresponding path program 7 times [2024-11-28 03:57:54,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:54,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733047127] [2024-11-28 03:57:54,596 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:57:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:57:54,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:54,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733047127] [2024-11-28 03:57:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733047127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:54,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292094405] [2024-11-28 03:57:54,996 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:57:54,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:54,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:55,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:57:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:55,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:57:55,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:57:55,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:57:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292094405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:55,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 03:57:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404636433] [2024-11-28 03:57:55,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:55,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:57:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:55,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:57:55,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:57:55,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:55,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 65 transitions, 413 flow. Second operand has 24 states, 24 states have (on average 18.791666666666668) internal successors, (451), 24 states have internal predecessors, (451), 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 03:57:55,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:55,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:57,107 INFO L124 PetriNetUnfolderBase]: 3900/6085 cut-off events. [2024-11-28 03:57:57,107 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2024-11-28 03:57:57,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13381 conditions, 6085 events. 3900/6085 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 29317 event pairs, 3441 based on Foata normal form. 2/5030 useless extension candidates. Maximal degree in co-relation 10621. Up to 3621 conditions per place. [2024-11-28 03:57:57,127 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 46 selfloop transitions, 18 changer transitions 90/158 dead transitions. [2024-11-28 03:57:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 1130 flow [2024-11-28 03:57:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:57:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:57:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2024-11-28 03:57:57,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31238095238095237 [2024-11-28 03:57:57,130 INFO L175 Difference]: Start difference. First operand has 102 places, 65 transitions, 413 flow. Second operand 14 states and 328 transitions. [2024-11-28 03:57:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 1130 flow [2024-11-28 03:57:57,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 1077 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-28 03:57:57,140 INFO L231 Difference]: Finished difference. Result has 112 places, 67 transitions, 472 flow [2024-11-28 03:57:57,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=472, PETRI_PLACES=112, PETRI_TRANSITIONS=67} [2024-11-28 03:57:57,140 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 40 predicate places. [2024-11-28 03:57:57,140 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 67 transitions, 472 flow [2024-11-28 03:57:57,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.791666666666668) internal successors, (451), 24 states have internal predecessors, (451), 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 03:57:57,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:57,141 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-28 03:57:57,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:57,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:57,341 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:57,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 178370732, now seen corresponding path program 8 times [2024-11-28 03:57:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560518468] [2024-11-28 03:57:57,342 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:57,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:57,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:57:57,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:57,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560518468] [2024-11-28 03:57:57,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560518468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:57,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668590575] [2024-11-28 03:57:57,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:57,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:57,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:57,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:57:57,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:57,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:57,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:57:57,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:57:58,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:57:58,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668590575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:58,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:58,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-28 03:57:58,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230572160] [2024-11-28 03:57:58,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:58,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:57:58,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:58,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:57:58,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:57:58,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 03:57:58,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 67 transitions, 472 flow. Second operand has 18 states, 18 states have (on average 20.27777777777778) internal successors, (365), 18 states have internal predecessors, (365), 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 03:57:58,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:58,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 03:57:58,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:59,596 INFO L124 PetriNetUnfolderBase]: 3986/6243 cut-off events. [2024-11-28 03:57:59,597 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2024-11-28 03:57:59,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14003 conditions, 6243 events. 3986/6243 cut-off events. For 1274/1274 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 30390 event pairs, 3383 based on Foata normal form. 56/5217 useless extension candidates. Maximal degree in co-relation 13900. Up to 3617 conditions per place. [2024-11-28 03:57:59,631 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 46 selfloop transitions, 20 changer transitions 70/140 dead transitions. [2024-11-28 03:57:59,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 140 transitions, 1072 flow [2024-11-28 03:57:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:57:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 03:57:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 358 transitions. [2024-11-28 03:57:59,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2807843137254902 [2024-11-28 03:57:59,633 INFO L175 Difference]: Start difference. First operand has 112 places, 67 transitions, 472 flow. Second operand 17 states and 358 transitions. [2024-11-28 03:57:59,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 140 transitions, 1072 flow [2024-11-28 03:57:59,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1042 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-11-28 03:57:59,654 INFO L231 Difference]: Finished difference. Result has 118 places, 69 transitions, 545 flow [2024-11-28 03:57:59,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=545, PETRI_PLACES=118, PETRI_TRANSITIONS=69} [2024-11-28 03:57:59,655 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 46 predicate places. [2024-11-28 03:57:59,655 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 69 transitions, 545 flow [2024-11-28 03:57:59,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.27777777777778) internal successors, (365), 18 states have internal predecessors, (365), 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 03:57:59,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:59,656 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-28 03:57:59,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:57:59,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:57:59,857 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 03:57:59,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -214909337, now seen corresponding path program 9 times [2024-11-28 03:57:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641407505] [2024-11-28 03:57:59,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:00,161 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:58:00,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:58:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641407505] [2024-11-28 03:58:05,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641407505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636051423] [2024-11-28 03:58:05,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:58:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:05,171 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:05,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:58:05,458 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:58:05,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:05,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-28 03:58:05,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:05,802 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 23 treesize of output 1 [2024-11-28 03:58:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:58:22,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:08,804 WARN L286 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 969 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 03:59:08,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:59:08,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 3862 treesize of output 5590 [2024-11-28 03:59:10,241 INFO L224 Elim1Store]: Index analysis took 584 ms [2024-11-28 03:59:19,500 WARN L286 SmtUtils]: Spent 9.25s on a formula simplification that was a NOOP. DAG size: 969 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 03:59:19,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:59:19,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 3742 treesize of output 5526 [2024-11-28 04:03:41,809 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 04:03:41,810 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 04:03:41,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 04:03:41,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:03:42,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:03:42,011 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.pushInner(QuantifierPusher.java:274) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:194) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-28 04:03:42,023 INFO L158 Benchmark]: Toolchain (without parser) took 397311.18ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 90.2MB in the beginning and 1.1GB in the end (delta: -986.9MB). Peak memory consumption was 979.6MB. Max. memory is 16.1GB. [2024-11-28 04:03:42,023 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:03:42,023 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.74ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 77.1MB in the end (delta: 12.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:03:42,023 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.04ms. Allocated memory is still 117.4MB. Free memory was 77.1MB in the beginning and 74.7MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:03:42,024 INFO L158 Benchmark]: Boogie Preprocessor took 99.02ms. Allocated memory is still 117.4MB. Free memory was 74.7MB in the beginning and 71.8MB in the end (delta: 2.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:03:42,024 INFO L158 Benchmark]: RCFGBuilder took 1780.05ms. Allocated memory is still 117.4MB. Free memory was 71.8MB in the beginning and 75.5MB in the end (delta: -3.7MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2024-11-28 04:03:42,024 INFO L158 Benchmark]: TraceAbstraction took 394909.39ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 74.7MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 963.7MB. Max. memory is 16.1GB. [2024-11-28 04:03:42,026 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.74ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 77.1MB in the end (delta: 12.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.04ms. Allocated memory is still 117.4MB. Free memory was 77.1MB in the beginning and 74.7MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 99.02ms. Allocated memory is still 117.4MB. Free memory was 74.7MB in the beginning and 71.8MB in the end (delta: 2.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1780.05ms. Allocated memory is still 117.4MB. Free memory was 71.8MB in the beginning and 75.5MB in the end (delta: -3.7MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. * TraceAbstraction took 394909.39ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 74.7MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 963.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/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_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:03:44,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:03:45,059 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 04:03:45,070 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:03:45,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:03:45,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:03:45,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:03:45,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:03:45,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:03:45,119 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:03:45,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:03:45,120 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:03:45,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:03:45,121 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:03:45,123 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:03:45,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:03:45,123 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:03:45,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:03:45,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:03:45,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:03:45,124 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:03:45,125 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:03:45,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:03:45,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:03:45,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:03:45,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:03:45,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:03:45,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:03:45,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:03:45,128 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_bb7231b6-de63-4c33-8992-35fcf8bdf610/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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-11-28 04:03:45,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:03:45,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:03:45,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:03:45,537 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:03:45,539 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:03:45,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-28 04:03:48,682 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/20c793952/b9fd685a453f43ac90a16c2ec479e976/FLAG58b730c80 [2024-11-28 04:03:48,918 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:03:48,918 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-28 04:03:48,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/20c793952/b9fd685a453f43ac90a16c2ec479e976/FLAG58b730c80 [2024-11-28 04:03:48,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/data/20c793952/b9fd685a453f43ac90a16c2ec479e976 [2024-11-28 04:03:48,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:03:48,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:03:48,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:03:48,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:03:48,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:03:48,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:03:48" (1/1) ... [2024-11-28 04:03:48,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b67f3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:48, skipping insertion in model container [2024-11-28 04:03:48,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:03:48" (1/1) ... [2024-11-28 04:03:48,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:03:49,173 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 04:03:49,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:03:49,197 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:03:49,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:03:49,255 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:03:49,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49 WrapperNode [2024-11-28 04:03:49,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:03:49,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:03:49,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:03:49,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:03:49,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,335 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 322 [2024-11-28 04:03:49,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:03:49,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:03:49,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:03:49,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:03:49,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,355 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,390 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:03:49,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,419 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:03:49,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:03:49,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:03:49,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:03:49,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (1/1) ... [2024-11-28 04:03:49,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:03:49,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:49,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:03:49,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:03:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:03:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:03:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 04:03:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 04:03:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 04:03:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:03:49,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:03:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:03:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:03:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:03:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:03:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:03:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:03:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:03:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:03:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:03:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 04:03:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 04:03:49,543 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 04:03:49,731 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:03:49,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:03:50,753 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:03:50,755 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:03:51,466 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:03:51,466 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:03:51,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:03:51 BoogieIcfgContainer [2024-11-28 04:03:51,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:03:51,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:03:51,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:03:51,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:03:51,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:03:48" (1/3) ... [2024-11-28 04:03:51,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecc3bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:03:51, skipping insertion in model container [2024-11-28 04:03:51,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:03:49" (2/3) ... [2024-11-28 04:03:51,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecc3bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:03:51, skipping insertion in model container [2024-11-28 04:03:51,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:03:51" (3/3) ... [2024-11-28 04:03:51,484 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-11-28 04:03:51,503 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:03:51,504 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 67 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2024-11-28 04:03:51,505 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:03:51,646 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 04:03:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-11-28 04:03:51,768 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-11-28 04:03:51,772 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:03:51,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-11-28 04:03:51,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-11-28 04:03:51,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-11-28 04:03:51,802 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:03:51,823 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;@545e5200, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:03:51,827 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-28 04:03:51,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:03:51,834 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 04:03:51,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:03:51,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:51,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:03:51,836 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:03:51,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1014137, now seen corresponding path program 1 times [2024-11-28 04:03:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:03:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136349074] [2024-11-28 04:03:51,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:03:51,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:51,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:03:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:03:52,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:03:52,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:52,079 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 7 [2024-11-28 04:03:52,107 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 04:03:52,108 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:03:52,109 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:03:52,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136349074] [2024-11-28 04:03:52,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136349074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:03:52,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:03:52,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:03:52,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852050564] [2024-11-28 04:03:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:03:52,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:03:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:03:52,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:03:52,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:03:52,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:03:52,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 04:03:52,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:52,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:03:52,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:55,172 INFO L124 PetriNetUnfolderBase]: 11284/15951 cut-off events. [2024-11-28 04:03:55,172 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-28 04:03:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32435 conditions, 15951 events. 11284/15951 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 90752 event pairs, 10210 based on Foata normal form. 1/9522 useless extension candidates. Maximal degree in co-relation 31495. Up to 15928 conditions per place. [2024-11-28 04:03:55,298 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-28 04:03:55,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-11-28 04:03:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:03:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:03:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-28 04:03:55,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-28 04:03:55,318 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-11-28 04:03:55,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-11-28 04:03:55,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:03:55,336 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-28 04:03:55,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-28 04:03:55,344 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-28 04:03:55,344 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-28 04:03:55,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 04:03:55,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:55,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:03:55,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:03:55,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:55,546 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:03:55,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1014138, now seen corresponding path program 1 times [2024-11-28 04:03:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:03:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997201955] [2024-11-28 04:03:55,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:03:55,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:55,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:55,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:03:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:03:55,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:03:55,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:55,733 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 7 [2024-11-28 04:03:55,838 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 04:03:55,838 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:03:55,838 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:03:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997201955] [2024-11-28 04:03:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997201955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:03:55,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:03:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:03:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433706851] [2024-11-28 04:03:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:03:55,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:03:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:03:55,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:03:55,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:03:55,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:03:55,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 04:03:55,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:55,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:03:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:58,417 INFO L124 PetriNetUnfolderBase]: 11287/15960 cut-off events. [2024-11-28 04:03:58,418 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-11-28 04:03:58,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 15960 events. 11287/15960 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 90759 event pairs, 10210 based on Foata normal form. 0/9526 useless extension candidates. Maximal degree in co-relation 32069. Up to 15941 conditions per place. [2024-11-28 04:03:58,505 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-11-28 04:03:58,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-11-28 04:03:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:03:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:03:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-28 04:03:58,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-28 04:03:58,507 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-11-28 04:03:58,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-11-28 04:03:58,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:03:58,511 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-11-28 04:03:58,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-11-28 04:03:58,512 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-11-28 04:03:58,513 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-11-28 04:03:58,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 04:03:58,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:58,513 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 04:03:58,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:03:58,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:58,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:03:58,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 974619575, now seen corresponding path program 1 times [2024-11-28 04:03:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:03:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609643716] [2024-11-28 04:03:58,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:03:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:58,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:58,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:58,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:03:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:03:58,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:03:58,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:58,829 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 7 [2024-11-28 04:03:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:03:58,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:03:59,270 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:03:59,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609643716] [2024-11-28 04:03:59,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609643716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:59,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:03:59,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-28 04:03:59,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847895457] [2024-11-28 04:03:59,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:59,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:03:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:03:59,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:03:59,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:03:59,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:03:59,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 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 04:03:59,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:59,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:03:59,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:03,030 INFO L124 PetriNetUnfolderBase]: 11296/15987 cut-off events. [2024-11-28 04:04:03,030 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-11-28 04:04:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32237 conditions, 15987 events. 11296/15987 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 90873 event pairs, 10210 based on Foata normal form. 0/9553 useless extension candidates. Maximal degree in co-relation 32083. Up to 15944 conditions per place. [2024-11-28 04:04:03,107 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-11-28 04:04:03,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 524 flow [2024-11-28 04:04:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:04:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 04:04:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-11-28 04:04:03,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2024-11-28 04:04:03,113 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 10 states and 214 transitions. [2024-11-28 04:04:03,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 524 flow [2024-11-28 04:04:03,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:04:03,121 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 458 flow [2024-11-28 04:04:03,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=458, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-11-28 04:04:03,122 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-11-28 04:04:03,124 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 458 flow [2024-11-28 04:04:03,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 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 04:04:03,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:03,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:03,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:04:03,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:03,325 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:03,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1596366546, now seen corresponding path program 1 times [2024-11-28 04:04:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:03,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826152155] [2024-11-28 04:04:03,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:03,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:03,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:04:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:03,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:04:03,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:03,525 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 04:04:03,525 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:04:03,525 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826152155] [2024-11-28 04:04:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826152155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:04:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:04:03,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:04:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114102781] [2024-11-28 04:04:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:04:03,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:04:03,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:03,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:04:03,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:04:03,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 04:04:03,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 458 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 04:04:03,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:03,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 04:04:03,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:05,677 INFO L124 PetriNetUnfolderBase]: 12283/17546 cut-off events. [2024-11-28 04:04:05,678 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-28 04:04:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35524 conditions, 17546 events. 12283/17546 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 101599 event pairs, 11188 based on Foata normal form. 252/11001 useless extension candidates. Maximal degree in co-relation 35382. Up to 15936 conditions per place. [2024-11-28 04:04:05,754 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 143 selfloop transitions, 3 changer transitions 1/154 dead transitions. [2024-11-28 04:04:05,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 1016 flow [2024-11-28 04:04:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:04:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:04:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-28 04:04:05,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-28 04:04:05,756 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 458 flow. Second operand 4 states and 155 transitions. [2024-11-28 04:04:05,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 1016 flow [2024-11-28 04:04:05,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 860 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-11-28 04:04:05,763 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 388 flow [2024-11-28 04:04:05,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-11-28 04:04:05,764 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-11-28 04:04:05,764 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 388 flow [2024-11-28 04:04:05,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 04:04:05,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:05,764 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:05,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:04:05,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:05,965 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:05,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1940175025, now seen corresponding path program 1 times [2024-11-28 04:04:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:05,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343068528] [2024-11-28 04:04:05,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:05,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:05,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:05,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:04:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:06,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:04:06,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:06,279 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 04:04:06,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:06,581 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 04:04:06,581 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343068528] [2024-11-28 04:04:06,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343068528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:06,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:04:06,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-28 04:04:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540127820] [2024-11-28 04:04:06,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:06,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:04:06,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:06,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:04:06,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:04:06,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 04:04:06,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 04:04:06,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:06,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 04:04:06,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:09,087 INFO L124 PetriNetUnfolderBase]: 16060/23047 cut-off events. [2024-11-28 04:04:09,088 INFO L125 PetriNetUnfolderBase]: For 1376/1376 co-relation queries the response was YES. [2024-11-28 04:04:09,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50957 conditions, 23047 events. 16060/23047 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 139153 event pairs, 7188 based on Foata normal form. 324/14731 useless extension candidates. Maximal degree in co-relation 50790. Up to 16081 conditions per place. [2024-11-28 04:04:09,315 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 172 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2024-11-28 04:04:09,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 188 transitions, 1049 flow [2024-11-28 04:04:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:04:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:04:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-28 04:04:09,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4822222222222222 [2024-11-28 04:04:09,317 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 388 flow. Second operand 6 states and 217 transitions. [2024-11-28 04:04:09,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 188 transitions, 1049 flow [2024-11-28 04:04:09,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 188 transitions, 1045 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:04:09,330 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 441 flow [2024-11-28 04:04:09,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-11-28 04:04:09,333 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2024-11-28 04:04:09,333 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 441 flow [2024-11-28 04:04:09,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 04:04:09,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:09,334 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:09,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:04:09,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:09,534 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:09,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 589286378, now seen corresponding path program 1 times [2024-11-28 04:04:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895540273] [2024-11-28 04:04:09,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:09,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:04:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:09,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:04:09,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:09,652 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 7 [2024-11-28 04:04:09,694 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 04:04:09,694 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:04:09,694 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895540273] [2024-11-28 04:04:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895540273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:04:09,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:04:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:04:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044228225] [2024-11-28 04:04:09,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:04:09,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:04:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:09,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:04:09,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:04:09,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:04:09,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 04:04:09,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:09,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:04:09,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:11,494 INFO L124 PetriNetUnfolderBase]: 13936/20027 cut-off events. [2024-11-28 04:04:11,494 INFO L125 PetriNetUnfolderBase]: For 4131/4131 co-relation queries the response was YES. [2024-11-28 04:04:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 20027 events. 13936/20027 cut-off events. For 4131/4131 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 119270 event pairs, 12159 based on Foata normal form. 0/14076 useless extension candidates. Maximal degree in co-relation 47229. Up to 19892 conditions per place. [2024-11-28 04:04:11,577 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 88 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-28 04:04:11,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 101 transitions, 625 flow [2024-11-28 04:04:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:04:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:04:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-28 04:04:11,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-28 04:04:11,579 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 441 flow. Second operand 4 states and 100 transitions. [2024-11-28 04:04:11,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 101 transitions, 625 flow [2024-11-28 04:04:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:04:11,588 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 446 flow [2024-11-28 04:04:11,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=446, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-11-28 04:04:11,589 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2024-11-28 04:04:11,589 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 446 flow [2024-11-28 04:04:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 04:04:11,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:11,589 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-28 04:04:11,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:04:11,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:11,790 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:11,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash -976666898, now seen corresponding path program 2 times [2024-11-28 04:04:11,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:11,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111906070] [2024-11-28 04:04:11,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:04:11,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:11,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:11,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:04:11,896 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:04:11,896 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:11,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:04:11,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:11,922 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 7 [2024-11-28 04:04:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:04:12,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:04:13,300 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111906070] [2024-11-28 04:04:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111906070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:13,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:04:13,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-28 04:04:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232136405] [2024-11-28 04:04:13,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:13,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:04:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:13,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:04:13,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:04:13,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:04:13,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 446 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 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 04:04:13,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:13,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:04:13,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:18,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:19,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:20,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:22,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:24,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:26,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:27,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:32,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:04:35,722 INFO L124 PetriNetUnfolderBase]: 13978/20153 cut-off events. [2024-11-28 04:04:35,722 INFO L125 PetriNetUnfolderBase]: For 4384/4384 co-relation queries the response was YES. [2024-11-28 04:04:35,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47883 conditions, 20153 events. 13978/20153 cut-off events. For 4384/4384 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 120854 event pairs, 12159 based on Foata normal form. 42/14223 useless extension candidates. Maximal degree in co-relation 47241. Up to 19939 conditions per place. [2024-11-28 04:04:35,828 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 60 selfloop transitions, 91 changer transitions 0/155 dead transitions. [2024-11-28 04:04:35,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 155 transitions, 1024 flow [2024-11-28 04:04:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:04:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 04:04:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 407 transitions. [2024-11-28 04:04:35,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24666666666666667 [2024-11-28 04:04:35,833 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 446 flow. Second operand 22 states and 407 transitions. [2024-11-28 04:04:35,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 155 transitions, 1024 flow [2024-11-28 04:04:35,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1011 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:04:35,850 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 977 flow [2024-11-28 04:04:35,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=977, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2024-11-28 04:04:35,851 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 38 predicate places. [2024-11-28 04:04:35,851 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 977 flow [2024-11-28 04:04:35,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 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 04:04:35,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:35,852 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:35,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:04:36,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:36,052 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:36,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 589286379, now seen corresponding path program 1 times [2024-11-28 04:04:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:36,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678190947] [2024-11-28 04:04:36,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:36,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:36,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:36,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:04:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:36,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:04:36,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:36,240 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 04:04:36,240 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:04:36,240 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678190947] [2024-11-28 04:04:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678190947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:04:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:04:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:04:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760502187] [2024-11-28 04:04:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:04:36,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:04:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:36,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:04:36,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:04:36,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 04:04:36,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 977 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:36,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:36,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 04:04:36,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:39,015 INFO L124 PetriNetUnfolderBase]: 18211/26544 cut-off events. [2024-11-28 04:04:39,015 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-11-28 04:04:39,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62829 conditions, 26544 events. 18211/26544 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 167400 event pairs, 16253 based on Foata normal form. 509/19543 useless extension candidates. Maximal degree in co-relation 62566. Up to 19971 conditions per place. [2024-11-28 04:04:39,128 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 167 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-11-28 04:04:39,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 188 transitions, 1447 flow [2024-11-28 04:04:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:04:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:04:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-11-28 04:04:39,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-28 04:04:39,130 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 977 flow. Second operand 4 states and 148 transitions. [2024-11-28 04:04:39,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 188 transitions, 1447 flow [2024-11-28 04:04:39,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 188 transitions, 1215 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-11-28 04:04:39,143 INFO L231 Difference]: Finished difference. Result has 105 places, 155 transitions, 794 flow [2024-11-28 04:04:39,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=794, PETRI_PLACES=105, PETRI_TRANSITIONS=155} [2024-11-28 04:04:39,144 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 33 predicate places. [2024-11-28 04:04:39,144 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 155 transitions, 794 flow [2024-11-28 04:04:39,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:39,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:39,144 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:39,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:04:39,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:39,345 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:39,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2099640654, now seen corresponding path program 1 times [2024-11-28 04:04:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:39,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87639700] [2024-11-28 04:04:39,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:39,348 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:39,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:04:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:39,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:04:39,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:39,466 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 7 [2024-11-28 04:04:39,787 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 04:04:39,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:40,881 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 04:04:40,881 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87639700] [2024-11-28 04:04:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87639700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:40,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:04:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-11-28 04:04:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682096347] [2024-11-28 04:04:40,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:40,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:04:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:40,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:04:40,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:04:41,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:04:41,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 155 transitions, 794 flow. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 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 04:04:41,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:41,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:04:41,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:51,066 INFO L124 PetriNetUnfolderBase]: 41999/60680 cut-off events. [2024-11-28 04:04:51,067 INFO L125 PetriNetUnfolderBase]: For 13897/13897 co-relation queries the response was YES. [2024-11-28 04:04:51,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147250 conditions, 60680 events. 41999/60680 cut-off events. For 13897/13897 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 414016 event pairs, 36913 based on Foata normal form. 0/44141 useless extension candidates. Maximal degree in co-relation 147015. Up to 19967 conditions per place. [2024-11-28 04:04:51,348 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 188 selfloop transitions, 88 changer transitions 0/280 dead transitions. [2024-11-28 04:04:51,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 280 transitions, 1766 flow [2024-11-28 04:04:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:04:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 04:04:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2024-11-28 04:04:51,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3793939393939394 [2024-11-28 04:04:51,350 INFO L175 Difference]: Start difference. First operand has 105 places, 155 transitions, 794 flow. Second operand 11 states and 313 transitions. [2024-11-28 04:04:51,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 280 transitions, 1766 flow [2024-11-28 04:04:51,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 280 transitions, 1751 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:04:51,376 INFO L231 Difference]: Finished difference. Result has 115 places, 155 transitions, 994 flow [2024-11-28 04:04:51,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=994, PETRI_PLACES=115, PETRI_TRANSITIONS=155} [2024-11-28 04:04:51,377 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 43 predicate places. [2024-11-28 04:04:51,377 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 155 transitions, 994 flow [2024-11-28 04:04:51,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 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 04:04:51,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:51,378 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:51,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:04:51,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:51,578 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:51,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 183399409, now seen corresponding path program 1 times [2024-11-28 04:04:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:51,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735921306] [2024-11-28 04:04:51,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:51,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:51,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:51,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:51,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:04:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:51,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:04:51,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:51,681 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 6 treesize of output 7 [2024-11-28 04:04:51,743 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:04:51,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:04:51,789 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-28 04:04:51,790 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 14 treesize of output 20 [2024-11-28 04:04:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:04:51,849 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:04:51,850 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:04:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735921306] [2024-11-28 04:04:51,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735921306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:04:51,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:04:51,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:04:51,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437752812] [2024-11-28 04:04:51,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:04:51,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:04:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:04:51,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:04:51,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:04:51,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-28 04:04:51,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 155 transitions, 994 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 04:04:51,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:51,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-28 04:04:51,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:57,133 INFO L124 PetriNetUnfolderBase]: 31715/46069 cut-off events. [2024-11-28 04:04:57,133 INFO L125 PetriNetUnfolderBase]: For 14395/14395 co-relation queries the response was YES. [2024-11-28 04:04:57,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110834 conditions, 46069 events. 31715/46069 cut-off events. For 14395/14395 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 305567 event pairs, 27872 based on Foata normal form. 0/36872 useless extension candidates. Maximal degree in co-relation 110569. Up to 45715 conditions per place. [2024-11-28 04:04:57,386 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 121 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2024-11-28 04:04:57,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 1264 flow [2024-11-28 04:04:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:04:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:04:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-28 04:04:57,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2906666666666667 [2024-11-28 04:04:57,388 INFO L175 Difference]: Start difference. First operand has 115 places, 155 transitions, 994 flow. Second operand 5 states and 109 transitions. [2024-11-28 04:04:57,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 1264 flow [2024-11-28 04:04:57,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 151 transitions, 1247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:04:57,431 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1005 flow [2024-11-28 04:04:57,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1005, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-11-28 04:04:57,432 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 41 predicate places. [2024-11-28 04:04:57,432 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1005 flow [2024-11-28 04:04:57,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 04:04:57,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:57,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:57,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:04:57,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:57,633 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:04:57,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 183399410, now seen corresponding path program 1 times [2024-11-28 04:04:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:04:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156576164] [2024-11-28 04:04:57,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:04:57,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:57,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:57,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:04:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:04:57,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:04:57,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:57,803 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 7 [2024-11-28 04:04:57,818 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 7 [2024-11-28 04:04:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:04:58,061 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 04:04:58,094 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:04:58,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:04:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:04:58,162 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 04:04:58,179 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:04:58,179 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 13 treesize of output 13 [2024-11-28 04:04:58,402 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 04:04:58,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:05:04,790 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 04:05:04,790 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:05:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156576164] [2024-11-28 04:05:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156576164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:05:04,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:05:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-28 04:05:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310262448] [2024-11-28 04:05:04,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:05:04,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:05:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:05:04,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:05:04,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2024-11-28 04:05:07,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:05:07,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 75 [2024-11-28 04:05:07,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1005 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:05:07,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:05:07,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 75 [2024-11-28 04:05:07,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:05:36,569 INFO L124 PetriNetUnfolderBase]: 60989/87841 cut-off events. [2024-11-28 04:05:36,569 INFO L125 PetriNetUnfolderBase]: For 33305/33305 co-relation queries the response was YES. [2024-11-28 04:05:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209015 conditions, 87841 events. 60989/87841 cut-off events. For 33305/33305 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 611520 event pairs, 52729 based on Foata normal form. 3522/73665 useless extension candidates. Maximal degree in co-relation 208670. Up to 34510 conditions per place. [2024-11-28 04:05:37,062 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 193 selfloop transitions, 169 changer transitions 0/366 dead transitions. [2024-11-28 04:05:37,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 366 transitions, 3044 flow [2024-11-28 04:05:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:05:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 04:05:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 273 transitions. [2024-11-28 04:05:37,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26 [2024-11-28 04:05:37,065 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1005 flow. Second operand 14 states and 273 transitions. [2024-11-28 04:05:37,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 366 transitions, 3044 flow [2024-11-28 04:05:37,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 366 transitions, 2987 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:05:37,126 INFO L231 Difference]: Finished difference. Result has 130 places, 255 transitions, 2358 flow [2024-11-28 04:05:37,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2358, PETRI_PLACES=130, PETRI_TRANSITIONS=255} [2024-11-28 04:05:37,130 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 58 predicate places. [2024-11-28 04:05:37,130 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 255 transitions, 2358 flow [2024-11-28 04:05:37,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:05:37,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:05:37,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:05:37,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:05:37,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:05:37,331 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 04:05:37,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:05:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1390415517, now seen corresponding path program 1 times [2024-11-28 04:05:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:05:37,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819175331] [2024-11-28 04:05:37,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:05:37,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:05:37,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:05:37,334 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:05:37,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb7231b6-de63-4c33-8992-35fcf8bdf610/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:05:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:05:37,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:05:37,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:05:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:05:37,565 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:05:37,565 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:05:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819175331] [2024-11-28 04:05:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819175331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:05:37,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:05:37,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:05:37,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404185197] [2024-11-28 04:05:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:05:37,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:05:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:05:37,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:05:37,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:05:37,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-28 04:05:37,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 255 transitions, 2358 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 04:05:37,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:05:37,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-28 04:05:37,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand