./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.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_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/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_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/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_5e6654c5-4324-4006-8bee-62ee67e422c3/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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:51:03,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:51:03,106 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:51:03,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:51:03,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:51:03,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:51:03,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:51:03,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:51:03,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:51:03,169 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:51:03,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:51:03,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:51:03,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:51:03,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:51:03,173 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:51:03,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:51:03,173 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:51:03,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:51:03,175 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:51:03,175 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:51:03,175 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:51:03,175 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:51:03,175 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:51:03,175 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:51:03,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:51:03,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:51:03,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:51:03,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:51:03,177 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_5e6654c5-4324-4006-8bee-62ee67e422c3/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 -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-11-28 03:51:03,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:51:03,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:51:03,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:51:03,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:51:03,548 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:51:03,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-28 03:51:06,702 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/data/948cfbc6b/2ebb3e5d044942e3a0bc26fffdec164e/FLAG6f39ef871 [2024-11-28 03:51:06,968 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:51:06,969 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-28 03:51:06,980 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/data/948cfbc6b/2ebb3e5d044942e3a0bc26fffdec164e/FLAG6f39ef871 [2024-11-28 03:51:06,999 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/data/948cfbc6b/2ebb3e5d044942e3a0bc26fffdec164e [2024-11-28 03:51:07,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:51:07,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:51:07,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:51:07,011 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:51:07,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:51:07,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e53978a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07, skipping insertion in model container [2024-11-28 03:51:07,019 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:51:07,305 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:51:07,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:51:07,332 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:51:07,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:51:07,393 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:51:07,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07 WrapperNode [2024-11-28 03:51:07,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:51:07,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:51:07,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:51:07,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:51:07,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,415 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,452 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 155 [2024-11-28 03:51:07,452 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:51:07,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:51:07,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:51:07,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:51:07,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,512 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-28 03:51:07,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,513 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,525 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:51:07,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:51:07,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:51:07,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:51:07,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (1/1) ... [2024-11-28 03:51:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:51:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:07,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:51:07,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:51:07,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:51:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:51:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:51:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:51:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:51:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:51:07,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:51:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:51:07,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:51:07,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:51:07,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:51:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:51:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:51:07,640 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:51:07,798 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:51:07,804 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:51:08,286 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:51:08,286 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:51:08,707 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:51:08,707 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:51:08,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:51:08 BoogieIcfgContainer [2024-11-28 03:51:08,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:51:08,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:51:08,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:51:08,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:51:08,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:51:07" (1/3) ... [2024-11-28 03:51:08,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff55bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:51:08, skipping insertion in model container [2024-11-28 03:51:08,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:51:07" (2/3) ... [2024-11-28 03:51:08,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff55bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:51:08, skipping insertion in model container [2024-11-28 03:51:08,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:51:08" (3/3) ... [2024-11-28 03:51:08,727 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-11-28 03:51:08,747 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:51:08,749 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-prod-cons.wvr.c that has 4 procedures, 43 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-28 03:51:08,749 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:51:08,865 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:51:08,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 46 transitions, 113 flow [2024-11-28 03:51:08,986 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-11-28 03:51:08,994 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:51:09,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 4/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 96 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-11-28 03:51:09,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 46 transitions, 113 flow [2024-11-28 03:51:09,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 42 transitions, 102 flow [2024-11-28 03:51:09,016 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:51:09,033 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;@e598e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:51:09,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-28 03:51:09,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:51:09,038 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:51:09,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:51:09,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:09,039 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:51:09,039 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:09,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash 477548, now seen corresponding path program 1 times [2024-11-28 03:51:09,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:09,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680412589] [2024-11-28 03:51:09,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:09,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680412589] [2024-11-28 03:51:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680412589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:09,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:51:09,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668087236] [2024-11-28 03:51:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:09,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:51:09,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:09,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:51:09,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:51:09,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-28 03:51:09,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:09,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:09,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-28 03:51:09,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:09,948 INFO L124 PetriNetUnfolderBase]: 509/922 cut-off events. [2024-11-28 03:51:09,949 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-28 03:51:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 922 events. 509/922 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5725 event pairs, 456 based on Foata normal form. 1/680 useless extension candidates. Maximal degree in co-relation 1722. Up to 778 conditions per place. [2024-11-28 03:51:09,967 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 25 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-28 03:51:09,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 150 flow [2024-11-28 03:51:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:51:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:51:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-28 03:51:09,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-11-28 03:51:09,985 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 102 flow. Second operand 3 states and 77 transitions. [2024-11-28 03:51:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 150 flow [2024-11-28 03:51:09,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:51:09,996 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 88 flow [2024-11-28 03:51:09,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-28 03:51:10,004 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2024-11-28 03:51:10,004 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 88 flow [2024-11-28 03:51:10,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:10,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:10,005 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:51:10,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:51:10,006 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:10,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 477549, now seen corresponding path program 1 times [2024-11-28 03:51:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394229882] [2024-11-28 03:51:10,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:10,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:10,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394229882] [2024-11-28 03:51:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394229882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:10,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:51:10,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451342269] [2024-11-28 03:51:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:10,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:51:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:10,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:51:10,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:51:10,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-28 03:51:10,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:10,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:10,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-28 03:51:10,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:10,912 INFO L124 PetriNetUnfolderBase]: 510/925 cut-off events. [2024-11-28 03:51:10,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:51:10,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 925 events. 510/925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5719 event pairs, 456 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 1743. Up to 783 conditions per place. [2024-11-28 03:51:10,925 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-11-28 03:51:10,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 158 flow [2024-11-28 03:51:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:51:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:51:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-28 03:51:10,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-11-28 03:51:10,928 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 88 flow. Second operand 4 states and 96 transitions. [2024-11-28 03:51:10,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 158 flow [2024-11-28 03:51:10,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:10,932 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 111 flow [2024-11-28 03:51:10,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-28 03:51:10,934 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-11-28 03:51:10,934 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 111 flow [2024-11-28 03:51:10,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:10,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:10,935 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 03:51:10,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:51:10,936 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:10,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash 458939897, now seen corresponding path program 1 times [2024-11-28 03:51:10,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:10,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492314842] [2024-11-28 03:51:10,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492314842] [2024-11-28 03:51:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492314842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:11,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835905213] [2024-11-28 03:51:11,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:11,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:11,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:11,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:11,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:51:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:11,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:51:11,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:11,698 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 [2024-11-28 03:51:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:12,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835905213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:12,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:12,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:51:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343554404] [2024-11-28 03:51:12,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:12,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:51:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:12,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:51:12,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:51:12,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-28 03:51:12,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 111 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:12,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-28 03:51:12,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:13,155 INFO L124 PetriNetUnfolderBase]: 510/924 cut-off events. [2024-11-28 03:51:13,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:51:13,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1772 conditions, 924 events. 510/924 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5750 event pairs, 456 based on Foata normal form. 0/681 useless extension candidates. Maximal degree in co-relation 1750. Up to 779 conditions per place. [2024-11-28 03:51:13,165 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-11-28 03:51:13,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 167 flow [2024-11-28 03:51:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:51:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:51:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-28 03:51:13,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4601449275362319 [2024-11-28 03:51:13,168 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 111 flow. Second operand 6 states and 127 transitions. [2024-11-28 03:51:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 167 flow [2024-11-28 03:51:13,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:51:13,171 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 118 flow [2024-11-28 03:51:13,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-28 03:51:13,173 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2024-11-28 03:51:13,173 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 118 flow [2024-11-28 03:51:13,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:13,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:13,175 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:13,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:13,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:13,376 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:13,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -660357908, now seen corresponding path program 1 times [2024-11-28 03:51:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088658432] [2024-11-28 03:51:13,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088658432] [2024-11-28 03:51:13,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088658432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:13,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:13,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:51:13,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383301430] [2024-11-28 03:51:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:13,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:51:13,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:13,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:51:13,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:51:13,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-28 03:51:13,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:13,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:13,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-28 03:51:13,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:13,813 INFO L124 PetriNetUnfolderBase]: 628/1176 cut-off events. [2024-11-28 03:51:13,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:51:13,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 1176 events. 628/1176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7396 event pairs, 573 based on Foata normal form. 32/966 useless extension candidates. Maximal degree in co-relation 1751. Up to 781 conditions per place. [2024-11-28 03:51:13,826 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-11-28 03:51:13,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 248 flow [2024-11-28 03:51:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:51:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:51:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-11-28 03:51:13,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-11-28 03:51:13,830 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 118 flow. Second operand 4 states and 120 transitions. [2024-11-28 03:51:13,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 248 flow [2024-11-28 03:51:13,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 218 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-28 03:51:13,835 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 107 flow [2024-11-28 03:51:13,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-28 03:51:13,837 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-11-28 03:51:13,837 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 107 flow [2024-11-28 03:51:13,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:13,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:13,838 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:13,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:51:13,838 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:13,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1431511008, now seen corresponding path program 1 times [2024-11-28 03:51:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046935558] [2024-11-28 03:51:13,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046935558] [2024-11-28 03:51:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046935558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292511616] [2024-11-28 03:51:14,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:14,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:14,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:14,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:14,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:51:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:14,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:51:14,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:14,541 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:51:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292511616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:14,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:51:14,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-28 03:51:14,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458089903] [2024-11-28 03:51:14,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:14,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:51:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:14,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:51:14,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:51:14,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-28 03:51:14,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:14,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:14,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-28 03:51:14,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:14,788 INFO L124 PetriNetUnfolderBase]: 483/925 cut-off events. [2024-11-28 03:51:14,788 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-28 03:51:14,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 925 events. 483/925 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5501 event pairs, 436 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 1406. Up to 766 conditions per place. [2024-11-28 03:51:14,797 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 25 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-11-28 03:51:14,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 155 flow [2024-11-28 03:51:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:51:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:51:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-28 03:51:14,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5163043478260869 [2024-11-28 03:51:14,802 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 107 flow. Second operand 4 states and 95 transitions. [2024-11-28 03:51:14,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 155 flow [2024-11-28 03:51:14,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:14,806 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 100 flow [2024-11-28 03:51:14,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-28 03:51:14,808 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2024-11-28 03:51:14,808 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 100 flow [2024-11-28 03:51:14,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:14,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:14,808 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:14,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:51:15,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:15,010 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:15,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1431511007, now seen corresponding path program 1 times [2024-11-28 03:51:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478449176] [2024-11-28 03:51:15,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:15,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:15,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478449176] [2024-11-28 03:51:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478449176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:15,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:51:15,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452398520] [2024-11-28 03:51:15,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:15,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:51:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:15,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:51:15,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:51:15,135 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-28 03:51:15,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:15,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:15,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-28 03:51:15,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:15,303 INFO L124 PetriNetUnfolderBase]: 362/714 cut-off events. [2024-11-28 03:51:15,304 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 03:51:15,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 714 events. 362/714 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3877 event pairs, 323 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 913. Up to 583 conditions per place. [2024-11-28 03:51:15,310 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-28 03:51:15,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 144 flow [2024-11-28 03:51:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:51:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:51:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-11-28 03:51:15,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2024-11-28 03:51:15,313 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-11-28 03:51:15,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 144 flow [2024-11-28 03:51:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:15,316 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 94 flow [2024-11-28 03:51:15,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-28 03:51:15,318 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2024-11-28 03:51:15,319 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 94 flow [2024-11-28 03:51:15,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:15,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:15,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:15,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:51:15,320 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:15,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash -608162283, now seen corresponding path program 1 times [2024-11-28 03:51:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:15,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376519829] [2024-11-28 03:51:15,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:15,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376519829] [2024-11-28 03:51:15,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376519829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:15,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:15,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:51:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119814909] [2024-11-28 03:51:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:15,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:51:15,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:15,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:51:15,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:51:15,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-28 03:51:15,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:15,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:15,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-28 03:51:15,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:15,948 INFO L124 PetriNetUnfolderBase]: 718/1282 cut-off events. [2024-11-28 03:51:15,948 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-11-28 03:51:15,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1282 events. 718/1282 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6638 event pairs, 145 based on Foata normal form. 78/1333 useless extension candidates. Maximal degree in co-relation 1748. Up to 576 conditions per place. [2024-11-28 03:51:15,959 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 55 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2024-11-28 03:51:15,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 290 flow [2024-11-28 03:51:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:51:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:51:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-28 03:51:15,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5608695652173913 [2024-11-28 03:51:15,962 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 94 flow. Second operand 5 states and 129 transitions. [2024-11-28 03:51:15,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 290 flow [2024-11-28 03:51:15,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:15,966 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2024-11-28 03:51:15,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-11-28 03:51:15,968 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2024-11-28 03:51:15,970 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2024-11-28 03:51:15,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:15,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:15,970 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:15,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:51:15,971 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:15,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 883823305, now seen corresponding path program 2 times [2024-11-28 03:51:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:15,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884293948] [2024-11-28 03:51:15,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:51:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:15,996 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:51:15,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:16,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:16,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884293948] [2024-11-28 03:51:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884293948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:16,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:16,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:51:16,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165762028] [2024-11-28 03:51:16,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:16,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:51:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:16,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:51:16,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:51:16,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-11-28 03:51:16,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:16,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:16,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-11-28 03:51:16,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:16,729 INFO L124 PetriNetUnfolderBase]: 1131/1943 cut-off events. [2024-11-28 03:51:16,730 INFO L125 PetriNetUnfolderBase]: For 725/738 co-relation queries the response was YES. [2024-11-28 03:51:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1943 events. 1131/1943 cut-off events. For 725/738 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10564 event pairs, 509 based on Foata normal form. 16/1861 useless extension candidates. Maximal degree in co-relation 3781. Up to 840 conditions per place. [2024-11-28 03:51:16,743 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 49 selfloop transitions, 4 changer transitions 5/69 dead transitions. [2024-11-28 03:51:16,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 322 flow [2024-11-28 03:51:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:51:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:51:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-28 03:51:16,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-11-28 03:51:16,745 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 5 states and 131 transitions. [2024-11-28 03:51:16,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 322 flow [2024-11-28 03:51:16,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:51:16,750 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 140 flow [2024-11-28 03:51:16,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-11-28 03:51:16,751 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-11-28 03:51:16,751 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 140 flow [2024-11-28 03:51:16,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:16,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:16,752 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] [2024-11-28 03:51:16,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:51:16,752 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:16,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -743555106, now seen corresponding path program 1 times [2024-11-28 03:51:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:16,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278592633] [2024-11-28 03:51:16,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:16,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278592633] [2024-11-28 03:51:16,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278592633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:16,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:51:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661928185] [2024-11-28 03:51:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:16,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:51:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:16,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:51:16,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:51:16,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-28 03:51:16,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:16,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:16,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-28 03:51:16,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:17,112 INFO L124 PetriNetUnfolderBase]: 646/1260 cut-off events. [2024-11-28 03:51:17,112 INFO L125 PetriNetUnfolderBase]: For 486/527 co-relation queries the response was YES. [2024-11-28 03:51:17,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 1260 events. 646/1260 cut-off events. For 486/527 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7156 event pairs, 266 based on Foata normal form. 36/1187 useless extension candidates. Maximal degree in co-relation 2810. Up to 716 conditions per place. [2024-11-28 03:51:17,121 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 30 selfloop transitions, 2 changer transitions 7/55 dead transitions. [2024-11-28 03:51:17,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 257 flow [2024-11-28 03:51:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:51:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:51:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-28 03:51:17,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-11-28 03:51:17,123 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 140 flow. Second operand 3 states and 89 transitions. [2024-11-28 03:51:17,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 257 flow [2024-11-28 03:51:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:17,128 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 150 flow [2024-11-28 03:51:17,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=150, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-11-28 03:51:17,129 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-11-28 03:51:17,129 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 150 flow [2024-11-28 03:51:17,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:17,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:17,131 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, 1] [2024-11-28 03:51:17,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:51:17,132 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:17,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -137825887, now seen corresponding path program 1 times [2024-11-28 03:51:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:17,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956468559] [2024-11-28 03:51:17,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:18,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956468559] [2024-11-28 03:51:18,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956468559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751855713] [2024-11-28 03:51:18,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:18,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:18,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:51:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:18,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:51:18,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:18,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 03:51:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:19,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:20,586 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 40 treesize of output 36 [2024-11-28 03:51:20,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:51:20,611 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 50 treesize of output 46 [2024-11-28 03:51:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751855713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:20,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:20,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-28 03:51:20,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250532649] [2024-11-28 03:51:20,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:20,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:51:20,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:20,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:51:20,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:51:21,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-28 03:51:21,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 150 flow. Second operand has 28 states, 28 states have (on average 16.785714285714285) internal successors, (470), 28 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:21,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:21,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-28 03:51:21,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:24,635 INFO L124 PetriNetUnfolderBase]: 3205/5465 cut-off events. [2024-11-28 03:51:24,636 INFO L125 PetriNetUnfolderBase]: For 4044/4121 co-relation queries the response was YES. [2024-11-28 03:51:24,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13689 conditions, 5465 events. 3205/5465 cut-off events. For 4044/4121 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 34441 event pairs, 454 based on Foata normal form. 73/5063 useless extension candidates. Maximal degree in co-relation 7771. Up to 1344 conditions per place. [2024-11-28 03:51:24,672 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 122 selfloop transitions, 37 changer transitions 60/229 dead transitions. [2024-11-28 03:51:24,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 229 transitions, 1242 flow [2024-11-28 03:51:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:51:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:51:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 485 transitions. [2024-11-28 03:51:24,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2024-11-28 03:51:24,676 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 150 flow. Second operand 20 states and 485 transitions. [2024-11-28 03:51:24,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 229 transitions, 1242 flow [2024-11-28 03:51:24,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 229 transitions, 1204 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-11-28 03:51:24,696 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 472 flow [2024-11-28 03:51:24,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=472, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-11-28 03:51:24,699 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2024-11-28 03:51:24,700 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 472 flow [2024-11-28 03:51:24,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 16.785714285714285) internal successors, (470), 28 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:24,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:24,700 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:24,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:51:24,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:51:24,901 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:24,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1562293859, now seen corresponding path program 2 times [2024-11-28 03:51:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:24,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 03:51:24,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:51:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:24,958 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:51:24,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:51:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 03:51:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137551041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:25,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:51:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118463926] [2024-11-28 03:51:25,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:25,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:51:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:25,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:51:25,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:51:25,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-28 03:51:25,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 472 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:25,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:25,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-28 03:51:25,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:27,099 INFO L124 PetriNetUnfolderBase]: 3886/6658 cut-off events. [2024-11-28 03:51:27,101 INFO L125 PetriNetUnfolderBase]: For 8073/8236 co-relation queries the response was YES. [2024-11-28 03:51:27,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19775 conditions, 6658 events. 3886/6658 cut-off events. For 8073/8236 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 42707 event pairs, 279 based on Foata normal form. 73/6531 useless extension candidates. Maximal degree in co-relation 12653. Up to 1731 conditions per place. [2024-11-28 03:51:27,155 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 110 selfloop transitions, 25 changer transitions 79/223 dead transitions. [2024-11-28 03:51:27,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 223 transitions, 1579 flow [2024-11-28 03:51:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:51:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:51:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-11-28 03:51:27,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632411067193676 [2024-11-28 03:51:27,159 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 472 flow. Second operand 11 states and 285 transitions. [2024-11-28 03:51:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 223 transitions, 1579 flow [2024-11-28 03:51:27,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 223 transitions, 1567 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 03:51:27,211 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 570 flow [2024-11-28 03:51:27,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=570, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-28 03:51:27,215 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 43 predicate places. [2024-11-28 03:51:27,215 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 570 flow [2024-11-28 03:51:27,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:27,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:27,215 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:27,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:51:27,216 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:27,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1398741420, now seen corresponding path program 3 times [2024-11-28 03:51:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267620109] [2024-11-28 03:51:27,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:51:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:27,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:51:27,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:51:27,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:27,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267620109] [2024-11-28 03:51:27,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267620109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:27,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715296953] [2024-11-28 03:51:27,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:51:27,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:27,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:27,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:51:27,605 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:51:27,605 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:27,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:51:27,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:27,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:51:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715296953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:28,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:28,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-28 03:51:28,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364301551] [2024-11-28 03:51:28,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:28,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:51:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:28,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:51:28,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:51:28,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-28 03:51:28,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 570 flow. Second operand has 16 states, 16 states have (on average 20.875) internal successors, (334), 16 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:28,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:28,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-28 03:51:28,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:28,919 INFO L124 PetriNetUnfolderBase]: 1145/2370 cut-off events. [2024-11-28 03:51:28,920 INFO L125 PetriNetUnfolderBase]: For 4435/4619 co-relation queries the response was YES. [2024-11-28 03:51:28,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7116 conditions, 2370 events. 1145/2370 cut-off events. For 4435/4619 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15377 event pairs, 347 based on Foata normal form. 217/2362 useless extension candidates. Maximal degree in co-relation 5266. Up to 669 conditions per place. [2024-11-28 03:51:28,937 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 5 changer transitions 65/123 dead transitions. [2024-11-28 03:51:28,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 876 flow [2024-11-28 03:51:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:51:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:51:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-11-28 03:51:28,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-11-28 03:51:28,939 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 570 flow. Second operand 9 states and 231 transitions. [2024-11-28 03:51:28,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 876 flow [2024-11-28 03:51:28,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 123 transitions, 822 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-28 03:51:28,958 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 330 flow [2024-11-28 03:51:28,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2024-11-28 03:51:28,959 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2024-11-28 03:51:28,959 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 330 flow [2024-11-28 03:51:28,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.875) internal successors, (334), 16 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:28,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:28,960 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:28,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:29,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:29,165 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:29,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1952819952, now seen corresponding path program 4 times [2024-11-28 03:51:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:29,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430997553] [2024-11-28 03:51:29,166 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:51:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:29,210 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:51:29,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:51:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430997553] [2024-11-28 03:51:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430997553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:29,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:51:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684847696] [2024-11-28 03:51:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:29,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:51:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:29,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:51:29,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:51:29,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-28 03:51:29,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-28 03:51:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:29,778 INFO L124 PetriNetUnfolderBase]: 1243/2439 cut-off events. [2024-11-28 03:51:29,778 INFO L125 PetriNetUnfolderBase]: For 4248/4380 co-relation queries the response was YES. [2024-11-28 03:51:29,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7620 conditions, 2439 events. 1243/2439 cut-off events. For 4248/4380 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13943 event pairs, 259 based on Foata normal form. 120/2410 useless extension candidates. Maximal degree in co-relation 7580. Up to 662 conditions per place. [2024-11-28 03:51:29,800 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 73 selfloop transitions, 9 changer transitions 1/104 dead transitions. [2024-11-28 03:51:29,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 711 flow [2024-11-28 03:51:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:51:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:51:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-28 03:51:29,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2024-11-28 03:51:29,802 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 330 flow. Second operand 4 states and 125 transitions. [2024-11-28 03:51:29,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 711 flow [2024-11-28 03:51:29,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 625 flow, removed 19 selfloop flow, removed 16 redundant places. [2024-11-28 03:51:29,820 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 375 flow [2024-11-28 03:51:29,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-11-28 03:51:29,821 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 18 predicate places. [2024-11-28 03:51:29,821 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 375 flow [2024-11-28 03:51:29,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:29,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:29,822 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:29,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:51:29,822 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:51:29,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1283622837, now seen corresponding path program 5 times [2024-11-28 03:51:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:29,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291607319] [2024-11-28 03:51:29,823 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:29,864 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:51:29,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:51:32,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291607319] [2024-11-28 03:51:32,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291607319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162921232] [2024-11-28 03:51:32,900 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:32,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:32,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:51:33,028 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:51:33,028 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:33,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:51:33,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:51:34,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:35,827 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-28 03:51:35,827 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 51 treesize of output 43 [2024-11-28 03:51:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:51:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162921232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:36,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:36,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 46 [2024-11-28 03:51:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527314508] [2024-11-28 03:51:36,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:36,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 03:51:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:36,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 03:51:36,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:51:38,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-28 03:51:38,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 375 flow. Second operand has 47 states, 47 states have (on average 13.340425531914894) internal successors, (627), 47 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:38,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:38,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-28 03:51:38,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:18,557 INFO L124 PetriNetUnfolderBase]: 32603/52544 cut-off events. [2024-11-28 03:52:18,558 INFO L125 PetriNetUnfolderBase]: For 95059/95976 co-relation queries the response was YES. [2024-11-28 03:52:18,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170965 conditions, 52544 events. 32603/52544 cut-off events. For 95059/95976 co-relation queries the response was YES. Maximal size of possible extension queue 1557. Compared 403822 event pairs, 1872 based on Foata normal form. 745/50499 useless extension candidates. Maximal degree in co-relation 156433. Up to 10963 conditions per place. [2024-11-28 03:52:19,202 INFO L140 encePairwiseOnDemand]: 28/46 looper letters, 1440 selfloop transitions, 785 changer transitions 769/3000 dead transitions. [2024-11-28 03:52:19,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 3000 transitions, 19576 flow [2024-11-28 03:52:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2024-11-28 03:52:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2024-11-28 03:52:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 5715 transitions. [2024-11-28 03:52:19,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4313858695652174 [2024-11-28 03:52:19,233 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 375 flow. Second operand 288 states and 5715 transitions. [2024-11-28 03:52:19,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 3000 transitions, 19576 flow [2024-11-28 03:52:19,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 3000 transitions, 19192 flow, removed 192 selfloop flow, removed 0 redundant places. [2024-11-28 03:52:19,463 INFO L231 Difference]: Finished difference. Result has 477 places, 895 transitions, 8930 flow [2024-11-28 03:52:19,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=288, PETRI_FLOW=8930, PETRI_PLACES=477, PETRI_TRANSITIONS=895} [2024-11-28 03:52:19,464 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 429 predicate places. [2024-11-28 03:52:19,464 INFO L471 AbstractCegarLoop]: Abstraction has has 477 places, 895 transitions, 8930 flow [2024-11-28 03:52:19,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 13.340425531914894) internal successors, (627), 47 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:19,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:19,465 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:19,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:52:19,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:19,669 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 03:52:19,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1966179229, now seen corresponding path program 6 times [2024-11-28 03:52:19,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466171607] [2024-11-28 03:52:19,670 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:19,736 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:52:19,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:52:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466171607] [2024-11-28 03:52:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466171607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023449511] [2024-11-28 03:52:21,271 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:21,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:21,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:21,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6654c5-4324-4006-8bee-62ee67e422c3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:52:21,394 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:52:21,394 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:21,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:52:21,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:21,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 03:52:22,739 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-11-28 03:52:22,739 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 39 treesize of output 19 [2024-11-28 03:52:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:52:22,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:25,128 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 76 treesize of output 68 [2024-11-28 03:52:25,204 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-28 03:52:25,205 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 137 treesize of output 135 [2024-11-28 03:52:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:52:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023449511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:26,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:26,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-28 03:52:26,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563158446] [2024-11-28 03:52:26,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:26,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 03:52:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:26,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 03:52:26,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 03:52:27,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-28 03:52:27,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 895 transitions, 8930 flow. Second operand has 43 states, 43 states have (on average 16.27906976744186) internal successors, (700), 43 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:27,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-28 03:52:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand