./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.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_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/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_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/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_b3841074-a0e9-46c6-bf54-ab71042965a9/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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:18:02,304 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:18:02,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 23:18:02,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:18:02,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:18:02,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:18:02,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:18:02,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:18:02,414 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:18:02,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:18:02,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:18:02,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:18:02,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:18:02,414 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:18:02,414 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:18:02,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:18:02,415 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:18:02,416 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:18:02,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:02,416 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:02,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:18:02,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:18:02,418 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:18:02,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:18:02,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:18:02,418 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_b3841074-a0e9-46c6-bf54-ab71042965a9/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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-27 23:18:02,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:18:02,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:18:02,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:18:02,763 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:18:02,764 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:18:02,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-27 23:18:05,802 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/data/18edba9b7/51bfe9a30b6b43098e431769e9637075/FLAGa38f33164 [2024-11-27 23:18:06,084 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:18:06,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-27 23:18:06,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/data/18edba9b7/51bfe9a30b6b43098e431769e9637075/FLAGa38f33164 [2024-11-27 23:18:06,143 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/data/18edba9b7/51bfe9a30b6b43098e431769e9637075 [2024-11-27 23:18:06,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:18:06,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:18:06,148 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:18:06,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:18:06,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:18:06,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7d0d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06, skipping insertion in model container [2024-11-27 23:18:06,157 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:18:06,418 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 23:18:06,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:18:06,437 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:18:06,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:18:06,492 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:18:06,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06 WrapperNode [2024-11-27 23:18:06,493 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:18:06,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:18:06,494 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:18:06,494 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:18:06,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,540 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2024-11-27 23:18:06,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:18:06,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:18:06,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:18:06,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:18:06,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,559 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,583 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 23:18:06,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,600 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,619 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:18:06,620 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:18:06,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:18:06,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:18:06,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (1/1) ... [2024-11-27 23:18:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:06,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:18:06,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:18:06,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:18:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:18:06,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:18:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 23:18:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:18:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:18:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:18:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:18:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:18:06,702 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:18:06,836 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:18:06,838 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:18:07,238 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:18:07,238 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:18:07,485 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:18:07,485 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 23:18:07,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:18:07 BoogieIcfgContainer [2024-11-27 23:18:07,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:18:07,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:18:07,489 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:18:07,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:18:07,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:18:06" (1/3) ... [2024-11-27 23:18:07,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1447d3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:18:07, skipping insertion in model container [2024-11-27 23:18:07,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:06" (2/3) ... [2024-11-27 23:18:07,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1447d3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:18:07, skipping insertion in model container [2024-11-27 23:18:07,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:18:07" (3/3) ... [2024-11-27 23:18:07,498 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-27 23:18:07,514 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:18:07,516 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 45 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-27 23:18:07,516 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:18:07,603 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 23:18:07,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 117 flow [2024-11-27 23:18:07,694 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-27 23:18:07,697 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 23:18:07,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 4/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-27 23:18:07,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 48 transitions, 117 flow [2024-11-27 23:18:07,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 106 flow [2024-11-27 23:18:07,713 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:18:07,725 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;@742a002e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:18:07,726 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-27 23:18:07,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:18:07,730 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 23:18:07,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:18:07,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:07,731 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 23:18:07,732 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:07,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash 456575, now seen corresponding path program 1 times [2024-11-27 23:18:07,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:07,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269470006] [2024-11-27 23:18:07,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:07,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269470006] [2024-11-27 23:18:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269470006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 23:18:07,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887044029] [2024-11-27 23:18:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:07,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:18:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:08,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:18:08,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:18:08,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-27 23:18:08,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 106 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) [2024-11-27 23:18:08,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:08,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-27 23:18:08,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:08,414 INFO L124 PetriNetUnfolderBase]: 535/975 cut-off events. [2024-11-27 23:18:08,414 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-27 23:18:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 975 events. 535/975 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6778 event pairs, 491 based on Foata normal form. 1/627 useless extension candidates. Maximal degree in co-relation 1792. Up to 826 conditions per place. [2024-11-27 23:18:08,451 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-27 23:18:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 154 flow [2024-11-27 23:18:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:18:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:18:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-27 23:18:08,469 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-27 23:18:08,474 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 106 flow. Second operand 3 states and 83 transitions. [2024-11-27 23:18:08,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 154 flow [2024-11-27 23:18:08,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 23:18:08,491 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 92 flow [2024-11-27 23:18:08,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-27 23:18:08,500 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-11-27 23:18:08,500 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 92 flow [2024-11-27 23:18:08,501 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) [2024-11-27 23:18:08,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:08,501 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 23:18:08,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:18:08,502 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:08,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 456576, now seen corresponding path program 1 times [2024-11-27 23:18:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930972723] [2024-11-27 23:18:08,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:08,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930972723] [2024-11-27 23:18:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930972723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:08,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:08,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:18:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380359866] [2024-11-27 23:18:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:08,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:08,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:08,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:08,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:08,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-27 23:18:08,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:08,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:08,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-27 23:18:08,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:09,222 INFO L124 PetriNetUnfolderBase]: 536/978 cut-off events. [2024-11-27 23:18:09,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:18:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 978 events. 536/978 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6752 event pairs, 491 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 1845. Up to 831 conditions per place. [2024-11-27 23:18:09,233 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-27 23:18:09,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 162 flow [2024-11-27 23:18:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-27 23:18:09,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-27 23:18:09,237 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 92 flow. Second operand 4 states and 104 transitions. [2024-11-27 23:18:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 162 flow [2024-11-27 23:18:09,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:18:09,240 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 115 flow [2024-11-27 23:18:09,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-27 23:18:09,241 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-27 23:18:09,242 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 115 flow [2024-11-27 23:18:09,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:09,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:09,243 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 23:18:09,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:18:09,245 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:09,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 438783091, now seen corresponding path program 1 times [2024-11-27 23:18:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644117155] [2024-11-27 23:18:09,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:09,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:09,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644117155] [2024-11-27 23:18:09,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644117155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:09,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746934772] [2024-11-27 23:18:09,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:09,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:09,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:09,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:18:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:09,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 23:18:09,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:09,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-27 23:18:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:10,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:10,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746934772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:10,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:10,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-27 23:18:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483871875] [2024-11-27 23:18:10,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:10,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:18:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:10,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:18:10,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:18:10,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-27 23:18:10,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:10,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:10,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-27 23:18:10,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:11,035 INFO L124 PetriNetUnfolderBase]: 536/977 cut-off events. [2024-11-27 23:18:11,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:18:11,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 977 events. 536/977 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6754 event pairs, 491 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 1852. Up to 827 conditions per place. [2024-11-27 23:18:11,047 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-27 23:18:11,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 171 flow [2024-11-27 23:18:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:18:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:18:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-11-27 23:18:11,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2024-11-27 23:18:11,049 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 115 flow. Second operand 6 states and 139 transitions. [2024-11-27 23:18:11,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 171 flow [2024-11-27 23:18:11,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:18:11,051 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 122 flow [2024-11-27 23:18:11,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-27 23:18:11,052 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2024-11-27 23:18:11,053 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 122 flow [2024-11-27 23:18:11,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:11,053 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:11,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:18:11,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:11,258 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:11,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 837017746, now seen corresponding path program 1 times [2024-11-27 23:18:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:11,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809645383] [2024-11-27 23:18:11,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:11,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809645383] [2024-11-27 23:18:11,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809645383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:11,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 23:18:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244178816] [2024-11-27 23:18:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:11,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:18:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:11,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:18:11,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:18:11,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 23:18:11,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:11,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 23:18:11,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:11,602 INFO L124 PetriNetUnfolderBase]: 788/1330 cut-off events. [2024-11-27 23:18:11,602 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-27 23:18:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 1330 events. 788/1330 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7090 event pairs, 266 based on Foata normal form. 46/935 useless extension candidates. Maximal degree in co-relation 2517. Up to 856 conditions per place. [2024-11-27 23:18:11,613 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-27 23:18:11,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 250 flow [2024-11-27 23:18:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:18:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:18:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-27 23:18:11,615 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-11-27 23:18:11,615 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 122 flow. Second operand 3 states and 103 transitions. [2024-11-27 23:18:11,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 250 flow [2024-11-27 23:18:11,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 220 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-27 23:18:11,617 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 115 flow [2024-11-27 23:18:11,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-27 23:18:11,618 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-27 23:18:11,618 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 115 flow [2024-11-27 23:18:11,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:11,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:11,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:18:11,619 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:11,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1377938232, now seen corresponding path program 1 times [2024-11-27 23:18:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:11,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651366662] [2024-11-27 23:18:11,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:11,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:11,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:11,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651366662] [2024-11-27 23:18:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651366662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:11,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:11,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:18:11,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438462897] [2024-11-27 23:18:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:11,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:11,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:11,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:11,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-27 23:18:11,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 115 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) [2024-11-27 23:18:11,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:11,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-27 23:18:11,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:11,958 INFO L124 PetriNetUnfolderBase]: 488/856 cut-off events. [2024-11-27 23:18:11,958 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-27 23:18:11,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 856 events. 488/856 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4388 event pairs, 330 based on Foata normal form. 0/700 useless extension candidates. Maximal degree in co-relation 842. Up to 712 conditions per place. [2024-11-27 23:18:11,966 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 26 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-27 23:18:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 165 flow [2024-11-27 23:18:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-27 23:18:11,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-11-27 23:18:11,971 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 115 flow. Second operand 4 states and 99 transitions. [2024-11-27 23:18:11,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 165 flow [2024-11-27 23:18:11,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:18:11,976 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2024-11-27 23:18:11,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-27 23:18:11,977 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-27 23:18:11,977 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2024-11-27 23:18:11,977 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) [2024-11-27 23:18:11,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:11,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:11,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:18:11,978 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:11,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1377938231, now seen corresponding path program 1 times [2024-11-27 23:18:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018204668] [2024-11-27 23:18:11,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:12,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:12,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018204668] [2024-11-27 23:18:12,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018204668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:12,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:12,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985960474] [2024-11-27 23:18:12,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:12,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:12,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:12,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:12,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:12,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 23:18:12,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:12,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:12,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 23:18:12,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:12,324 INFO L124 PetriNetUnfolderBase]: 540/979 cut-off events. [2024-11-27 23:18:12,324 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-27 23:18:12,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 979 events. 540/979 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5295 event pairs, 383 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 1794. Up to 715 conditions per place. [2024-11-27 23:18:12,330 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 39 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-27 23:18:12,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 226 flow [2024-11-27 23:18:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-27 23:18:12,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-11-27 23:18:12,333 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 117 transitions. [2024-11-27 23:18:12,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 226 flow [2024-11-27 23:18:12,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:18:12,336 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 115 flow [2024-11-27 23:18:12,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-11-27 23:18:12,338 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-27 23:18:12,338 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 115 flow [2024-11-27 23:18:12,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:12,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:12,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:12,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:18:12,338 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:12,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1832196214, now seen corresponding path program 1 times [2024-11-27 23:18:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:12,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169474414] [2024-11-27 23:18:12,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:12,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:18:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169474414] [2024-11-27 23:18:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169474414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:12,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448770707] [2024-11-27 23:18:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:12,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:18:12,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:12,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:18:12,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:18:12,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-27 23:18:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-11-27 23:18:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:12,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-27 23:18:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:12,617 INFO L124 PetriNetUnfolderBase]: 694/1162 cut-off events. [2024-11-27 23:18:12,617 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-11-27 23:18:12,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1162 events. 694/1162 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6192 event pairs, 219 based on Foata normal form. 14/1011 useless extension candidates. Maximal degree in co-relation 2313. Up to 743 conditions per place. [2024-11-27 23:18:12,625 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-27 23:18:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 237 flow [2024-11-27 23:18:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:18:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:18:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-27 23:18:12,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-27 23:18:12,626 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 115 flow. Second operand 3 states and 93 transitions. [2024-11-27 23:18:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 237 flow [2024-11-27 23:18:12,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:18:12,628 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 118 flow [2024-11-27 23:18:12,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-27 23:18:12,629 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-27 23:18:12,629 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 118 flow [2024-11-27 23:18:12,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-11-27 23:18:12,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:12,629 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:12,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:18:12,631 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:12,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1832196180, now seen corresponding path program 1 times [2024-11-27 23:18:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782948654] [2024-11-27 23:18:12,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:18:12,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782948654] [2024-11-27 23:18:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782948654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:12,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:18:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282183965] [2024-11-27 23:18:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:12,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:18:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:12,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:18:12,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:18:12,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 23:18:12,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:12,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:12,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 23:18:12,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:13,126 INFO L124 PetriNetUnfolderBase]: 327/682 cut-off events. [2024-11-27 23:18:13,126 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2024-11-27 23:18:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 682 events. 327/682 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3669 event pairs, 200 based on Foata normal form. 54/699 useless extension candidates. Maximal degree in co-relation 1172. Up to 419 conditions per place. [2024-11-27 23:18:13,131 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 25 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-27 23:18:13,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 192 flow [2024-11-27 23:18:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:18:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:18:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-27 23:18:13,132 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-27 23:18:13,133 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 118 flow. Second operand 5 states and 127 transitions. [2024-11-27 23:18:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 192 flow [2024-11-27 23:18:13,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:18:13,135 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 122 flow [2024-11-27 23:18:13,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-27 23:18:13,136 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-27 23:18:13,138 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 122 flow [2024-11-27 23:18:13,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:13,138 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] [2024-11-27 23:18:13,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 23:18:13,138 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:13,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 530930398, now seen corresponding path program 1 times [2024-11-27 23:18:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250729737] [2024-11-27 23:18:13,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250729737] [2024-11-27 23:18:13,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250729737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:13,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:13,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:13,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289579035] [2024-11-27 23:18:13,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:13,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:13,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:13,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:13,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:13,290 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:13,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:13,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:13,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:13,467 INFO L124 PetriNetUnfolderBase]: 497/875 cut-off events. [2024-11-27 23:18:13,467 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-11-27 23:18:13,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 875 events. 497/875 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4276 event pairs, 63 based on Foata normal form. 48/911 useless extension candidates. Maximal degree in co-relation 1650. Up to 522 conditions per place. [2024-11-27 23:18:13,472 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-27 23:18:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 306 flow [2024-11-27 23:18:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-27 23:18:13,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-27 23:18:13,474 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 122 flow. Second operand 4 states and 109 transitions. [2024-11-27 23:18:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 306 flow [2024-11-27 23:18:13,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 23:18:13,476 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 129 flow [2024-11-27 23:18:13,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-27 23:18:13,477 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-11-27 23:18:13,477 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 129 flow [2024-11-27 23:18:13,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:13,478 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] [2024-11-27 23:18:13,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 23:18:13,478 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:13,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2062177844, now seen corresponding path program 2 times [2024-11-27 23:18:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:13,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600012376] [2024-11-27 23:18:13,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:13,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:13,500 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 23:18:13,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600012376] [2024-11-27 23:18:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600012376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:13,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98410322] [2024-11-27 23:18:13,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:13,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:13,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:13,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:13,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:13,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:13,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:13,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:13,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:13,775 INFO L124 PetriNetUnfolderBase]: 489/848 cut-off events. [2024-11-27 23:18:13,775 INFO L125 PetriNetUnfolderBase]: For 302/344 co-relation queries the response was YES. [2024-11-27 23:18:13,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 848 events. 489/848 cut-off events. For 302/344 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3619 event pairs, 95 based on Foata normal form. 58/905 useless extension candidates. Maximal degree in co-relation 1659. Up to 613 conditions per place. [2024-11-27 23:18:13,780 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 37 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-11-27 23:18:13,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 262 flow [2024-11-27 23:18:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-27 23:18:13,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-27 23:18:13,781 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 129 flow. Second operand 4 states and 101 transitions. [2024-11-27 23:18:13,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 262 flow [2024-11-27 23:18:13,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:18:13,784 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 159 flow [2024-11-27 23:18:13,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-11-27 23:18:13,784 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-27 23:18:13,784 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 159 flow [2024-11-27 23:18:13,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:13,785 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] [2024-11-27 23:18:13,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 23:18:13,785 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:13,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1686629776, now seen corresponding path program 3 times [2024-11-27 23:18:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:13,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334548014] [2024-11-27 23:18:13,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:13,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:13,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334548014] [2024-11-27 23:18:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334548014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:13,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:13,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:18:13,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795861884] [2024-11-27 23:18:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:13,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:18:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:13,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:18:13,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:18:14,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:14,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 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) [2024-11-27 23:18:14,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:14,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:14,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:14,283 INFO L124 PetriNetUnfolderBase]: 564/1015 cut-off events. [2024-11-27 23:18:14,283 INFO L125 PetriNetUnfolderBase]: For 608/618 co-relation queries the response was YES. [2024-11-27 23:18:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1015 events. 564/1015 cut-off events. For 608/618 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5071 event pairs, 142 based on Foata normal form. 62/1068 useless extension candidates. Maximal degree in co-relation 2041. Up to 552 conditions per place. [2024-11-27 23:18:14,290 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-27 23:18:14,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 373 flow [2024-11-27 23:18:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:18:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:18:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-27 23:18:14,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-27 23:18:14,292 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 159 flow. Second operand 5 states and 132 transitions. [2024-11-27 23:18:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 373 flow [2024-11-27 23:18:14,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:18:14,297 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 177 flow [2024-11-27 23:18:14,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-11-27 23:18:14,299 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-11-27 23:18:14,299 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 177 flow [2024-11-27 23:18:14,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 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) [2024-11-27 23:18:14,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:14,299 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] [2024-11-27 23:18:14,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 23:18:14,300 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:14,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 932407458, now seen corresponding path program 4 times [2024-11-27 23:18:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:14,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615373982] [2024-11-27 23:18:14,301 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:14,320 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:14,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:14,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615373982] [2024-11-27 23:18:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615373982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:14,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:14,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:14,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735324228] [2024-11-27 23:18:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:14,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:14,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:14,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:14,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:14,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:14,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:14,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:14,724 INFO L124 PetriNetUnfolderBase]: 740/1385 cut-off events. [2024-11-27 23:18:14,724 INFO L125 PetriNetUnfolderBase]: For 1297/1355 co-relation queries the response was YES. [2024-11-27 23:18:14,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 1385 events. 740/1385 cut-off events. For 1297/1355 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7710 event pairs, 212 based on Foata normal form. 100/1438 useless extension candidates. Maximal degree in co-relation 3042. Up to 667 conditions per place. [2024-11-27 23:18:14,733 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-27 23:18:14,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 353 flow [2024-11-27 23:18:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:18:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:18:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-27 23:18:14,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-27 23:18:14,734 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 177 flow. Second operand 5 states and 126 transitions. [2024-11-27 23:18:14,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 353 flow [2024-11-27 23:18:14,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:18:14,739 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 189 flow [2024-11-27 23:18:14,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-27 23:18:14,742 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-11-27 23:18:14,742 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 189 flow [2024-11-27 23:18:14,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:14,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:14,743 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] [2024-11-27 23:18:14,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 23:18:14,743 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:14,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -869113440, now seen corresponding path program 5 times [2024-11-27 23:18:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:14,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769771834] [2024-11-27 23:18:14,744 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:18:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:14,761 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:14,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769771834] [2024-11-27 23:18:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769771834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:18:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389713232] [2024-11-27 23:18:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:14,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:18:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:14,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:18:14,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:18:14,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:14,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:14,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:14,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:14,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:15,358 INFO L124 PetriNetUnfolderBase]: 1003/1803 cut-off events. [2024-11-27 23:18:15,359 INFO L125 PetriNetUnfolderBase]: For 1597/1613 co-relation queries the response was YES. [2024-11-27 23:18:15,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1803 events. 1003/1803 cut-off events. For 1597/1613 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10265 event pairs, 210 based on Foata normal form. 117/1868 useless extension candidates. Maximal degree in co-relation 4295. Up to 476 conditions per place. [2024-11-27 23:18:15,368 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 5 changer transitions 7/77 dead transitions. [2024-11-27 23:18:15,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 433 flow [2024-11-27 23:18:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:18:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:18:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-27 23:18:15,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-27 23:18:15,370 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 189 flow. Second operand 5 states and 136 transitions. [2024-11-27 23:18:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 433 flow [2024-11-27 23:18:15,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:18:15,376 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 192 flow [2024-11-27 23:18:15,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2024-11-27 23:18:15,377 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-11-27 23:18:15,377 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 192 flow [2024-11-27 23:18:15,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:15,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:15,378 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, 1] [2024-11-27 23:18:15,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 23:18:15,378 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:15,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -387412801, now seen corresponding path program 1 times [2024-11-27 23:18:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:15,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859751990] [2024-11-27 23:18:15,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:18:16,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859751990] [2024-11-27 23:18:16,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859751990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:16,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113036617] [2024-11-27 23:18:16,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:16,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:16,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:16,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:16,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:18:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:16,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:18:16,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:16,362 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 [2024-11-27 23:18:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:18:16,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:17,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-27 23:18:17,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:18:17,781 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 78 treesize of output 68 [2024-11-27 23:18:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:18:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113036617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:17,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:17,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-11-27 23:18:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468397918] [2024-11-27 23:18:17,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:17,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 23:18:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:17,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 23:18:17,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:18:18,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-27 23:18:18,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:18,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:18,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-27 23:18:18,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:24,332 INFO L124 PetriNetUnfolderBase]: 12007/17737 cut-off events. [2024-11-27 23:18:24,332 INFO L125 PetriNetUnfolderBase]: For 19316/19316 co-relation queries the response was YES. [2024-11-27 23:18:24,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50225 conditions, 17737 events. 12007/17737 cut-off events. For 19316/19316 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 105660 event pairs, 981 based on Foata normal form. 696/18428 useless extension candidates. Maximal degree in co-relation 26003. Up to 3565 conditions per place. [2024-11-27 23:18:24,402 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 351 selfloop transitions, 117 changer transitions 92/564 dead transitions. [2024-11-27 23:18:24,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 564 transitions, 3337 flow [2024-11-27 23:18:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-27 23:18:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-27 23:18:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1097 transitions. [2024-11-27 23:18:24,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40095029239766083 [2024-11-27 23:18:24,409 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 192 flow. Second operand 57 states and 1097 transitions. [2024-11-27 23:18:24,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 564 transitions, 3337 flow [2024-11-27 23:18:24,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 564 transitions, 3234 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-27 23:18:24,436 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1289 flow [2024-11-27 23:18:24,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1289, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-11-27 23:18:24,437 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-11-27 23:18:24,437 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1289 flow [2024-11-27 23:18:24,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:24,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:24,437 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] [2024-11-27 23:18:24,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:18:24,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:24,642 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:24,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash -394733690, now seen corresponding path program 2 times [2024-11-27 23:18:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:24,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959111566] [2024-11-27 23:18:24,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:24,685 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:24,685 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 23:18:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959111566] [2024-11-27 23:18:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959111566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963263753] [2024-11-27 23:18:24,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:24,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:24,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:24,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:24,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 23:18:24,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1289 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:24,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:24,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 23:18:24,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:25,477 INFO L124 PetriNetUnfolderBase]: 2082/3910 cut-off events. [2024-11-27 23:18:25,477 INFO L125 PetriNetUnfolderBase]: For 54010/54262 co-relation queries the response was YES. [2024-11-27 23:18:25,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20741 conditions, 3910 events. 2082/3910 cut-off events. For 54010/54262 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24850 event pairs, 475 based on Foata normal form. 276/3891 useless extension candidates. Maximal degree in co-relation 18141. Up to 1551 conditions per place. [2024-11-27 23:18:25,510 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 113 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-11-27 23:18:25,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 2142 flow [2024-11-27 23:18:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-27 23:18:25,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-27 23:18:25,512 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1289 flow. Second operand 4 states and 123 transitions. [2024-11-27 23:18:25,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 2142 flow [2024-11-27 23:18:25,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 226 transitions, 1782 flow, removed 112 selfloop flow, removed 15 redundant places. [2024-11-27 23:18:25,612 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 1551 flow [2024-11-27 23:18:25,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1551, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2024-11-27 23:18:25,613 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-11-27 23:18:25,613 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 1551 flow [2024-11-27 23:18:25,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:25,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:25,613 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 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] [2024-11-27 23:18:25,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 23:18:25,613 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:25,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1768465980, now seen corresponding path program 3 times [2024-11-27 23:18:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:25,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525613046] [2024-11-27 23:18:25,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:25,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:25,646 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:25,648 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:18:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525613046] [2024-11-27 23:18:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525613046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:25,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:18:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668459696] [2024-11-27 23:18:25,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:25,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:18:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:25,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:18:25,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:18:26,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:26,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:26,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:26,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:26,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:27,207 INFO L124 PetriNetUnfolderBase]: 4290/7539 cut-off events. [2024-11-27 23:18:27,207 INFO L125 PetriNetUnfolderBase]: For 81442/81526 co-relation queries the response was YES. [2024-11-27 23:18:27,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38708 conditions, 7539 events. 4290/7539 cut-off events. For 81442/81526 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50296 event pairs, 775 based on Foata normal form. 236/7419 useless extension candidates. Maximal degree in co-relation 28976. Up to 2376 conditions per place. [2024-11-27 23:18:27,242 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 175 selfloop transitions, 49 changer transitions 54/315 dead transitions. [2024-11-27 23:18:27,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 315 transitions, 3177 flow [2024-11-27 23:18:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:18:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 23:18:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-11-27 23:18:27,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-27 23:18:27,243 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 1551 flow. Second operand 8 states and 200 transitions. [2024-11-27 23:18:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 315 transitions, 3177 flow [2024-11-27 23:18:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 315 transitions, 3107 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-11-27 23:18:27,341 INFO L231 Difference]: Finished difference. Result has 145 places, 213 transitions, 1779 flow [2024-11-27 23:18:27,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1779, PETRI_PLACES=145, PETRI_TRANSITIONS=213} [2024-11-27 23:18:27,342 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-11-27 23:18:27,342 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 213 transitions, 1779 flow [2024-11-27 23:18:27,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:27,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:27,343 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-27 23:18:27,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 23:18:27,343 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:27,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -754410586, now seen corresponding path program 4 times [2024-11-27 23:18:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732907436] [2024-11-27 23:18:27,344 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:27,389 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:27,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 23:18:27,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732907436] [2024-11-27 23:18:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732907436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:27,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:18:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531382840] [2024-11-27 23:18:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:27,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:27,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:27,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:27,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-27 23:18:27,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 213 transitions, 1779 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:27,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-27 23:18:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:18:28,401 INFO L124 PetriNetUnfolderBase]: 3332/5927 cut-off events. [2024-11-27 23:18:28,401 INFO L125 PetriNetUnfolderBase]: For 64999/65381 co-relation queries the response was YES. [2024-11-27 23:18:28,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30626 conditions, 5927 events. 3332/5927 cut-off events. For 64999/65381 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 37525 event pairs, 605 based on Foata normal form. 527/6135 useless extension candidates. Maximal degree in co-relation 27353. Up to 2545 conditions per place. [2024-11-27 23:18:28,438 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 149 selfloop transitions, 6 changer transitions 3/198 dead transitions. [2024-11-27 23:18:28,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 2098 flow [2024-11-27 23:18:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:18:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-27 23:18:28,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-11-27 23:18:28,439 INFO L175 Difference]: Start difference. First operand has 145 places, 213 transitions, 1779 flow. Second operand 4 states and 105 transitions. [2024-11-27 23:18:28,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 2098 flow [2024-11-27 23:18:28,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 198 transitions, 1957 flow, removed 40 selfloop flow, removed 11 redundant places. [2024-11-27 23:18:28,495 INFO L231 Difference]: Finished difference. Result has 129 places, 163 transitions, 1355 flow [2024-11-27 23:18:28,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1355, PETRI_PLACES=129, PETRI_TRANSITIONS=163} [2024-11-27 23:18:28,496 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-11-27 23:18:28,496 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 163 transitions, 1355 flow [2024-11-27 23:18:28,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:28,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:18:28,497 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-27 23:18:28,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 23:18:28,497 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:18:28,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash -204723836, now seen corresponding path program 1 times [2024-11-27 23:18:28,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:28,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451508372] [2024-11-27 23:18:28,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:28,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:18:30,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451508372] [2024-11-27 23:18:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451508372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672686300] [2024-11-27 23:18:30,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:30,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:30,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:30,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:18:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:30,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:18:30,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:31,382 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-27 23:18:31,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-11-27 23:18:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:18:31,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:32,008 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-27 23:18:32,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2024-11-27 23:18:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:18:33,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672686300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:33,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:33,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-11-27 23:18:33,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399440972] [2024-11-27 23:18:33,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:33,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:18:33,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:33,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:18:33,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:18:33,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-11-27 23:18:33,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 163 transitions, 1355 flow. Second operand has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:33,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:18:33,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-11-27 23:18:33,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:06,720 INFO L124 PetriNetUnfolderBase]: 63936/101292 cut-off events. [2024-11-27 23:19:06,720 INFO L125 PetriNetUnfolderBase]: For 616989/617245 co-relation queries the response was YES. [2024-11-27 23:19:07,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445237 conditions, 101292 events. 63936/101292 cut-off events. For 616989/617245 co-relation queries the response was YES. Maximal size of possible extension queue 1745. Compared 788086 event pairs, 3428 based on Foata normal form. 4722/105512 useless extension candidates. Maximal degree in co-relation 353065. Up to 14348 conditions per place. [2024-11-27 23:19:07,419 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 2040 selfloop transitions, 1095 changer transitions 641/3783 dead transitions. [2024-11-27 23:19:07,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 3783 transitions, 36455 flow [2024-11-27 23:19:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2024-11-27 23:19:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2024-11-27 23:19:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 4380 transitions. [2024-11-27 23:19:07,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44730392156862747 [2024-11-27 23:19:07,437 INFO L175 Difference]: Start difference. First operand has 129 places, 163 transitions, 1355 flow. Second operand 204 states and 4380 transitions. [2024-11-27 23:19:07,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 3783 transitions, 36455 flow [2024-11-27 23:19:08,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 3783 transitions, 36191 flow, removed 129 selfloop flow, removed 1 redundant places. [2024-11-27 23:19:08,299 INFO L231 Difference]: Finished difference. Result has 426 places, 1377 transitions, 17312 flow [2024-11-27 23:19:08,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=204, PETRI_FLOW=17312, PETRI_PLACES=426, PETRI_TRANSITIONS=1377} [2024-11-27 23:19:08,299 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 376 predicate places. [2024-11-27 23:19:08,300 INFO L471 AbstractCegarLoop]: Abstraction has has 426 places, 1377 transitions, 17312 flow [2024-11-27 23:19:08,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:08,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:08,300 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-27 23:19:08,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:19:08,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:19:08,501 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-27 23:19:08,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1148571384, now seen corresponding path program 2 times [2024-11-27 23:19:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:08,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168611974] [2024-11-27 23:19:08,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:08,546 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:08,546 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:19:09,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168611974] [2024-11-27 23:19:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168611974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833234836] [2024-11-27 23:19:09,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:09,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:09,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:09,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:09,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3841074-a0e9-46c6-bf54-ab71042965a9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:19:09,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:09,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:09,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 23:19:09,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:09,881 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 [2024-11-27 23:19:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:19:10,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:12,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2024-11-27 23:19:12,264 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-27 23:19:12,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2024-11-27 23:19:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:19:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833234836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:13,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-11-27 23:19:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244334271] [2024-11-27 23:19:13,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:13,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 23:19:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:13,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 23:19:13,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:19:13,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-27 23:19:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1377 transitions, 17312 flow. Second operand has 39 states, 39 states have (on average 17.205128205128204) internal successors, (671), 39 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:13,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:13,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-27 23:19:13,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand