./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC --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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:32:07,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:32:07,465 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:32:07,475 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:32:07,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:32:07,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:32:07,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:32:07,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:32:07,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:32:07,507 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:32:07,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:32:07,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:32:07,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:32:07,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:32:07,508 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:32:07,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:32:07,508 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:32:07,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:32:07,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:32:07,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:32:07,509 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:32:07,511 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:32:07,512 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:32:07,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:32:07,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:32:07,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:32:07,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:32:07,513 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_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC 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 -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-23 18:32:07,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:32:07,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:32:07,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:32:07,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:32:07,877 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:32:07,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-23 18:32:10,873 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/eccac66cf/a5c642538e0d41998eb709be3a8d6178/FLAG96cc01475 [2024-11-23 18:32:11,116 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:32:11,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-23 18:32:11,124 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/eccac66cf/a5c642538e0d41998eb709be3a8d6178/FLAG96cc01475 [2024-11-23 18:32:11,139 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/eccac66cf/a5c642538e0d41998eb709be3a8d6178 [2024-11-23 18:32:11,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:32:11,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:32:11,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:32:11,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:32:11,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:32:11,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6145441b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11, skipping insertion in model container [2024-11-23 18:32:11,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,168 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:32:11,390 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:32:11,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:32:11,415 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:32:11,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:32:11,498 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:32:11,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11 WrapperNode [2024-11-23 18:32:11,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:32:11,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:32:11,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:32:11,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:32:11,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,590 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 136 [2024-11-23 18:32:11,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:32:11,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:32:11,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:32:11,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:32:11,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,606 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,633 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 18:32:11,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,633 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,645 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:32:11,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:32:11,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:32:11,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:32:11,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (1/1) ... [2024-11-23 18:32:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:32:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:11,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:32:11,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:32:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:32:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:32:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:32:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:32:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:32:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:32:11,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:32:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:32:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:32:11,759 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:32:11,883 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:32:11,885 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:32:12,340 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:32:12,344 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:32:12,715 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:32:12,715 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 18:32:12,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:32:12 BoogieIcfgContainer [2024-11-23 18:32:12,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:32:12,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:32:12,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:32:12,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:32:12,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:32:11" (1/3) ... [2024-11-23 18:32:12,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ef58a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:32:12, skipping insertion in model container [2024-11-23 18:32:12,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:32:11" (2/3) ... [2024-11-23 18:32:12,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ef58a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:32:12, skipping insertion in model container [2024-11-23 18:32:12,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:32:12" (3/3) ... [2024-11-23 18:32:12,727 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-23 18:32:12,746 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:32:12,748 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-23 18:32:12,749 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:32:12,814 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:32:12,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-23 18:32:12,888 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-23 18:32:12,891 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:32:12,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-23 18:32:12,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-23 18:32:12,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-23 18:32:12,907 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:32:12,928 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;@3d951195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:32:12,928 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-23 18:32:12,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:32:12,935 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 18:32:12,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:32:12,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:12,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:32:12,936 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:12,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 479539, now seen corresponding path program 1 times [2024-11-23 18:32:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401789350] [2024-11-23 18:32:12,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:13,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:13,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401789350] [2024-11-23 18:32:13,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401789350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:13,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:13,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:32:13,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082178033] [2024-11-23 18:32:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:13,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:32:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:13,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:32:13,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:32:13,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:13,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:32:13,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:13,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:13,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:13,406 INFO L124 PetriNetUnfolderBase]: 88/213 cut-off events. [2024-11-23 18:32:13,406 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-23 18:32:13,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 213 events. 88/213 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 893 event pairs, 64 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 334. Up to 153 conditions per place. [2024-11-23 18:32:13,415 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-23 18:32:13,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-23 18:32:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:32:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:32:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-23 18:32:13,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-23 18:32:13,437 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-23 18:32:13,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-23 18:32:13,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:13,447 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-23 18:32:13,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-23 18:32:13,456 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-23 18:32:13,456 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-23 18:32:13,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:32:13,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:13,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:32:13,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:32:13,460 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:13,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 479540, now seen corresponding path program 1 times [2024-11-23 18:32:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:13,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081618279] [2024-11-23 18:32:13,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:13,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:13,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081618279] [2024-11-23 18:32:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081618279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:32:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548207252] [2024-11-23 18:32:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:13,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:32:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:13,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:32:13,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:32:14,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:14,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-23 18:32:14,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:14,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:14,202 INFO L124 PetriNetUnfolderBase]: 89/216 cut-off events. [2024-11-23 18:32:14,202 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:32:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 216 events. 89/216 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 64 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 364. Up to 158 conditions per place. [2024-11-23 18:32:14,207 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-23 18:32:14,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-23 18:32:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:32:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:32:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-23 18:32:14,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-23 18:32:14,211 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-23 18:32:14,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-23 18:32:14,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:32:14,213 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-23 18:32:14,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-23 18:32:14,216 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-23 18:32:14,216 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-23 18:32:14,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-23 18:32:14,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:14,216 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 18:32:14,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:32:14,218 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:14,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 460852356, now seen corresponding path program 1 times [2024-11-23 18:32:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460907463] [2024-11-23 18:32:14,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460907463] [2024-11-23 18:32:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460907463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460147842] [2024-11-23 18:32:14,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:14,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:14,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:14,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:32:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:14,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:32:14,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:14,839 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 [2024-11-23 18:32:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:15,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460147842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:15,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:15,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 18:32:15,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504066944] [2024-11-23 18:32:15,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:15,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:32:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:15,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:32:15,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:32:15,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:15,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-11-23 18:32:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:15,840 INFO L124 PetriNetUnfolderBase]: 90/218 cut-off events. [2024-11-23 18:32:15,840 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:32:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 218 events. 90/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 913 event pairs, 64 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 364. Up to 155 conditions per place. [2024-11-23 18:32:15,842 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 18 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2024-11-23 18:32:15,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 147 flow [2024-11-23 18:32:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:32:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:32:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-11-23 18:32:15,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46332046332046334 [2024-11-23 18:32:15,845 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 7 states and 120 transitions. [2024-11-23 18:32:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 147 flow [2024-11-23 18:32:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:32:15,846 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 110 flow [2024-11-23 18:32:15,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=110, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-23 18:32:15,847 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-23 18:32:15,847 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 110 flow [2024-11-23 18:32:15,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-11-23 18:32:15,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:15,848 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 18:32:15,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:32:16,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:16,049 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:16,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1403611472, now seen corresponding path program 1 times [2024-11-23 18:32:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812341387] [2024-11-23 18:32:16,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:16,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:16,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812341387] [2024-11-23 18:32:16,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812341387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:16,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:16,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:32:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212197522] [2024-11-23 18:32:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:16,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:32:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:16,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:32:16,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:32:16,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:16,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:16,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:16,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:16,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:16,277 INFO L124 PetriNetUnfolderBase]: 89/217 cut-off events. [2024-11-23 18:32:16,277 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:32:16,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 217 events. 89/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 64 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 364. Up to 159 conditions per place. [2024-11-23 18:32:16,282 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-23 18:32:16,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 156 flow [2024-11-23 18:32:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:32:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:32:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-23 18:32:16,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-23 18:32:16,284 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 110 flow. Second operand 3 states and 66 transitions. [2024-11-23 18:32:16,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 156 flow [2024-11-23 18:32:16,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 141 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-23 18:32:16,288 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 93 flow [2024-11-23 18:32:16,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-23 18:32:16,289 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-23 18:32:16,289 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 93 flow [2024-11-23 18:32:16,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:16,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:16,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:16,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 18:32:16,290 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:16,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1755370496, now seen corresponding path program 1 times [2024-11-23 18:32:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208648635] [2024-11-23 18:32:16,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:16,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:16,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208648635] [2024-11-23 18:32:16,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208648635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:16,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498465490] [2024-11-23 18:32:16,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:16,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:16,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:16,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:32:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:16,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:32:16,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:16,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:16,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-23 18:32:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498465490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:16,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-23 18:32:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893071998] [2024-11-23 18:32:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:16,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:32:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:16,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:32:16,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:17,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:17,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 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) [2024-11-23 18:32:17,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:17,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:17,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:17,429 INFO L124 PetriNetUnfolderBase]: 175/379 cut-off events. [2024-11-23 18:32:17,429 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-23 18:32:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 379 events. 175/379 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1784 event pairs, 64 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 696. Up to 165 conditions per place. [2024-11-23 18:32:17,433 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-11-23 18:32:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 210 flow [2024-11-23 18:32:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:32:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:32:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-23 18:32:17,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-23 18:32:17,437 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 93 flow. Second operand 5 states and 105 transitions. [2024-11-23 18:32:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 210 flow [2024-11-23 18:32:17,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:32:17,439 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 108 flow [2024-11-23 18:32:17,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-23 18:32:17,444 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-11-23 18:32:17,444 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 108 flow [2024-11-23 18:32:17,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 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) [2024-11-23 18:32:17,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:17,445 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:17,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:32:17,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:17,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:17,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1755370497, now seen corresponding path program 1 times [2024-11-23 18:32:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943524551] [2024-11-23 18:32:17,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:17,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943524551] [2024-11-23 18:32:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943524551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:17,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:17,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:32:17,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076483422] [2024-11-23 18:32:17,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:17,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:32:17,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:17,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:32:17,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:32:17,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-23 18:32:17,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-23 18:32:17,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:17,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-23 18:32:17,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:17,836 INFO L124 PetriNetUnfolderBase]: 155/328 cut-off events. [2024-11-23 18:32:17,836 INFO L125 PetriNetUnfolderBase]: For 28/32 co-relation queries the response was YES. [2024-11-23 18:32:17,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 328 events. 155/328 cut-off events. For 28/32 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1384 event pairs, 123 based on Foata normal form. 28/312 useless extension candidates. Maximal degree in co-relation 305. Up to 269 conditions per place. [2024-11-23 18:32:17,839 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-23 18:32:17,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 154 flow [2024-11-23 18:32:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:32:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:32:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-23 18:32:17,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-23 18:32:17,840 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 108 flow. Second operand 4 states and 61 transitions. [2024-11-23 18:32:17,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 154 flow [2024-11-23 18:32:17,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:32:17,842 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 99 flow [2024-11-23 18:32:17,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-23 18:32:17,842 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-23 18:32:17,842 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 99 flow [2024-11-23 18:32:17,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-23 18:32:17,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:17,843 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:17,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 18:32:17,845 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:17,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 985854613, now seen corresponding path program 1 times [2024-11-23 18:32:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396177222] [2024-11-23 18:32:17,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:18,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396177222] [2024-11-23 18:32:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396177222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777873467] [2024-11-23 18:32:18,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:18,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:18,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:32:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:18,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:32:18,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:18,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:18,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-23 18:32:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777873467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:18,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:18,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-23 18:32:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077947472] [2024-11-23 18:32:18,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:18,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:32:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:18,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:32:18,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:18,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:32:18,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 99 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 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) [2024-11-23 18:32:18,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:18,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:32:18,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:19,021 INFO L124 PetriNetUnfolderBase]: 293/524 cut-off events. [2024-11-23 18:32:19,021 INFO L125 PetriNetUnfolderBase]: For 66/82 co-relation queries the response was YES. [2024-11-23 18:32:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 524 events. 293/524 cut-off events. For 66/82 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2001 event pairs, 81 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 1086. Up to 333 conditions per place. [2024-11-23 18:32:19,025 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-11-23 18:32:19,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 213 flow [2024-11-23 18:32:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:32:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:32:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-23 18:32:19,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5027027027027027 [2024-11-23 18:32:19,027 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 99 flow. Second operand 5 states and 93 transitions. [2024-11-23 18:32:19,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 213 flow [2024-11-23 18:32:19,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:32:19,029 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 114 flow [2024-11-23 18:32:19,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-11-23 18:32:19,030 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-11-23 18:32:19,033 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 114 flow [2024-11-23 18:32:19,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 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) [2024-11-23 18:32:19,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:19,034 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:19,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:32:19,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:19,235 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:19,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1011116228, now seen corresponding path program 1 times [2024-11-23 18:32:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782663295] [2024-11-23 18:32:19,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:19,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782663295] [2024-11-23 18:32:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782663295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185485713] [2024-11-23 18:32:19,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:19,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:19,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:32:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:19,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:32:19,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:19,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:19,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-23 18:32:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:20,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185485713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:20,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:20,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-23 18:32:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741293855] [2024-11-23 18:32:20,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:20,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:32:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:20,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:32:20,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:32:20,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:20,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 114 flow. Second operand has 16 states, 16 states have (on average 14.8125) internal successors, (237), 16 states have internal predecessors, (237), 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) [2024-11-23 18:32:20,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:20,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:21,220 INFO L124 PetriNetUnfolderBase]: 474/918 cut-off events. [2024-11-23 18:32:21,220 INFO L125 PetriNetUnfolderBase]: For 92/97 co-relation queries the response was YES. [2024-11-23 18:32:21,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 918 events. 474/918 cut-off events. For 92/97 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4588 event pairs, 310 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 1069. Up to 441 conditions per place. [2024-11-23 18:32:21,228 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 64 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-11-23 18:32:21,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 375 flow [2024-11-23 18:32:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:32:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:32:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-11-23 18:32:21,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5844594594594594 [2024-11-23 18:32:21,230 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 114 flow. Second operand 8 states and 173 transitions. [2024-11-23 18:32:21,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 375 flow [2024-11-23 18:32:21,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:32:21,233 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 150 flow [2024-11-23 18:32:21,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-11-23 18:32:21,234 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2024-11-23 18:32:21,235 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 150 flow [2024-11-23 18:32:21,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.8125) internal successors, (237), 16 states have internal predecessors, (237), 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) [2024-11-23 18:32:21,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:21,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:21,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 18:32:21,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:21,436 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:21,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash 496722430, now seen corresponding path program 1 times [2024-11-23 18:32:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:21,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015207661] [2024-11-23 18:32:21,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:21,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:21,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015207661] [2024-11-23 18:32:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015207661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806860334] [2024-11-23 18:32:21,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:21,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:21,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:21,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:21,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:32:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:21,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:32:21,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:21,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:22,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-23 18:32:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806860334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:22,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:32:22,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705161759] [2024-11-23 18:32:22,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:22,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:32:22,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:22,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:32:22,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:32:22,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:32:22,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 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) [2024-11-23 18:32:22,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:22,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:32:22,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:22,782 INFO L124 PetriNetUnfolderBase]: 629/1111 cut-off events. [2024-11-23 18:32:22,782 INFO L125 PetriNetUnfolderBase]: For 643/691 co-relation queries the response was YES. [2024-11-23 18:32:22,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2785 conditions, 1111 events. 629/1111 cut-off events. For 643/691 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5096 event pairs, 330 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 2290. Up to 841 conditions per place. [2024-11-23 18:32:22,792 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-11-23 18:32:22,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 369 flow [2024-11-23 18:32:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:32:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:32:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-11-23 18:32:22,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5057915057915058 [2024-11-23 18:32:22,794 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 150 flow. Second operand 7 states and 131 transitions. [2024-11-23 18:32:22,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 369 flow [2024-11-23 18:32:22,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 352 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:22,797 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 171 flow [2024-11-23 18:32:22,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-11-23 18:32:22,798 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-23 18:32:22,798 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 171 flow [2024-11-23 18:32:22,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 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) [2024-11-23 18:32:22,799 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:22,799 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:22,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:32:22,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-23 18:32:23,000 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:23,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1425625972, now seen corresponding path program 2 times [2024-11-23 18:32:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859812312] [2024-11-23 18:32:23,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:23,018 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:32:23,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859812312] [2024-11-23 18:32:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859812312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830637844] [2024-11-23 18:32:23,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:23,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:23,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:23,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:32:23,297 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:32:23,297 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:23,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 18:32:23,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:23,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 18:32:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:23,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830637844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:23,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:23,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-23 18:32:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209631239] [2024-11-23 18:32:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:23,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:32:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:23,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:32:23,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:24,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:32:24,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 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) [2024-11-23 18:32:24,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:24,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:32:24,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:24,454 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-11-23 18:32:24,455 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-11-23 18:32:24,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2412 conditions, 943 events. 491/943 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4747 event pairs, 294 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 2045. Up to 640 conditions per place. [2024-11-23 18:32:24,466 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 36 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-11-23 18:32:24,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 297 flow [2024-11-23 18:32:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:32:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:32:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-23 18:32:24,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-23 18:32:24,468 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 171 flow. Second operand 5 states and 96 transitions. [2024-11-23 18:32:24,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 297 flow [2024-11-23 18:32:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 284 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:24,477 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 171 flow [2024-11-23 18:32:24,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-11-23 18:32:24,477 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-23 18:32:24,477 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 171 flow [2024-11-23 18:32:24,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 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) [2024-11-23 18:32:24,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:24,478 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:24,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:32:24,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:24,679 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:24,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 461622606, now seen corresponding path program 2 times [2024-11-23 18:32:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:24,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330073724] [2024-11-23 18:32:24,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:24,707 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:32:24,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 18:32:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330073724] [2024-11-23 18:32:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330073724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:25,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:25,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:32:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463203476] [2024-11-23 18:32:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:25,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:32:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:25,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:32:25,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:32:25,111 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:32:25,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:25,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:25,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:32:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:25,404 INFO L124 PetriNetUnfolderBase]: 537/949 cut-off events. [2024-11-23 18:32:25,405 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-11-23 18:32:25,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 949 events. 537/949 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4216 event pairs, 330 based on Foata normal form. 32/885 useless extension candidates. Maximal degree in co-relation 2187. Up to 684 conditions per place. [2024-11-23 18:32:25,413 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 36 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-11-23 18:32:25,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 308 flow [2024-11-23 18:32:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:32:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:32:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-23 18:32:25,414 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-23 18:32:25,415 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 171 flow. Second operand 5 states and 85 transitions. [2024-11-23 18:32:25,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 308 flow [2024-11-23 18:32:25,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 278 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:25,419 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 161 flow [2024-11-23 18:32:25,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-11-23 18:32:25,420 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2024-11-23 18:32:25,420 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 161 flow [2024-11-23 18:32:25,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:25,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:25,420 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:25,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 18:32:25,421 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:25,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1696075580, now seen corresponding path program 1 times [2024-11-23 18:32:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123610275] [2024-11-23 18:32:25,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:25,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:25,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123610275] [2024-11-23 18:32:25,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123610275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:25,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901283922] [2024-11-23 18:32:25,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:25,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:25,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:32:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:25,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:32:25,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:25,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:26,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-23 18:32:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901283922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:26,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-23 18:32:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5411227] [2024-11-23 18:32:26,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:26,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:32:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:26,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:32:26,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:32:26,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:32:26,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 161 flow. Second operand has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 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) [2024-11-23 18:32:26,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:26,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:32:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:27,159 INFO L124 PetriNetUnfolderBase]: 514/910 cut-off events. [2024-11-23 18:32:27,159 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-11-23 18:32:27,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 910 events. 514/910 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3932 event pairs, 288 based on Foata normal form. 16/862 useless extension candidates. Maximal degree in co-relation 2087. Up to 431 conditions per place. [2024-11-23 18:32:27,166 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 60 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-23 18:32:27,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 422 flow [2024-11-23 18:32:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:32:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:32:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-11-23 18:32:27,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-11-23 18:32:27,169 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 161 flow. Second operand 8 states and 150 transitions. [2024-11-23 18:32:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 422 flow [2024-11-23 18:32:27,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 402 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:27,174 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 184 flow [2024-11-23 18:32:27,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2024-11-23 18:32:27,176 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2024-11-23 18:32:27,179 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 184 flow [2024-11-23 18:32:27,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 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) [2024-11-23 18:32:27,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:27,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:27,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:32:27,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:27,380 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:27,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -364404660, now seen corresponding path program 1 times [2024-11-23 18:32:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:27,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352611537] [2024-11-23 18:32:27,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:27,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352611537] [2024-11-23 18:32:27,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352611537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:27,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:27,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:32:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110270288] [2024-11-23 18:32:27,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:27,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:32:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:27,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:32:27,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:32:27,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:27,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:27,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:27,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:27,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:27,701 INFO L124 PetriNetUnfolderBase]: 491/883 cut-off events. [2024-11-23 18:32:27,701 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-11-23 18:32:27,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 883 events. 491/883 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3864 event pairs, 144 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 2090. Up to 679 conditions per place. [2024-11-23 18:32:27,709 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 44 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-11-23 18:32:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 344 flow [2024-11-23 18:32:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:32:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:32:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-23 18:32:27,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-23 18:32:27,711 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 184 flow. Second operand 3 states and 77 transitions. [2024-11-23 18:32:27,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 344 flow [2024-11-23 18:32:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 328 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-23 18:32:27,716 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 224 flow [2024-11-23 18:32:27,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-11-23 18:32:27,717 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-23 18:32:27,717 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 224 flow [2024-11-23 18:32:27,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:27,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:27,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:27,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 18:32:27,718 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:27,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -285728276, now seen corresponding path program 2 times [2024-11-23 18:32:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418907490] [2024-11-23 18:32:27,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:27,735 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:32:27,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418907490] [2024-11-23 18:32:27,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418907490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652238204] [2024-11-23 18:32:27,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:27,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:27,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:27,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:32:28,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:32:28,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:28,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 18:32:28,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:28,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 18:32:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:28,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:32:28,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652238204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:28,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:28,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-23 18:32:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806559500] [2024-11-23 18:32:28,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:28,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:32:28,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:28,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:32:28,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:28,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:32:28,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 224 flow. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:28,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:28,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:32:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:28,917 INFO L124 PetriNetUnfolderBase]: 491/867 cut-off events. [2024-11-23 18:32:28,917 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2024-11-23 18:32:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 867 events. 491/867 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3719 event pairs, 196 based on Foata normal form. 16/883 useless extension candidates. Maximal degree in co-relation 2139. Up to 448 conditions per place. [2024-11-23 18:32:28,923 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 43 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-11-23 18:32:28,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 389 flow [2024-11-23 18:32:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:32:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:32:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-11-23 18:32:28,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2024-11-23 18:32:28,925 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 224 flow. Second operand 5 states and 83 transitions. [2024-11-23 18:32:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 389 flow [2024-11-23 18:32:28,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:32:28,930 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 229 flow [2024-11-23 18:32:28,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-11-23 18:32:28,931 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2024-11-23 18:32:28,931 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 229 flow [2024-11-23 18:32:28,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:28,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:28,931 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:28,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:32:29,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 18:32:29,132 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:29,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1057053616, now seen corresponding path program 1 times [2024-11-23 18:32:29,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:29,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233122029] [2024-11-23 18:32:29,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:29,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233122029] [2024-11-23 18:32:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233122029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:29,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 18:32:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595567745] [2024-11-23 18:32:29,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:29,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:32:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:29,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:32:29,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:32:29,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:29,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-11-23 18:32:29,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:29,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:29,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:29,575 INFO L124 PetriNetUnfolderBase]: 613/1101 cut-off events. [2024-11-23 18:32:29,575 INFO L125 PetriNetUnfolderBase]: For 1523/1523 co-relation queries the response was YES. [2024-11-23 18:32:29,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 1101 events. 613/1101 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5511 event pairs, 192 based on Foata normal form. 46/1147 useless extension candidates. Maximal degree in co-relation 2919. Up to 506 conditions per place. [2024-11-23 18:32:29,583 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 77 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-11-23 18:32:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 698 flow [2024-11-23 18:32:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:32:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:32:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-11-23 18:32:29,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2024-11-23 18:32:29,584 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 229 flow. Second operand 6 states and 147 transitions. [2024-11-23 18:32:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 698 flow [2024-11-23 18:32:29,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 658 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:32:29,590 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 362 flow [2024-11-23 18:32:29,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-11-23 18:32:29,591 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-11-23 18:32:29,591 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 362 flow [2024-11-23 18:32:29,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-11-23 18:32:29,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:29,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:29,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 18:32:29,592 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:29,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1103216698, now seen corresponding path program 2 times [2024-11-23 18:32:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942933193] [2024-11-23 18:32:29,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:29,612 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:32:29,612 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942933193] [2024-11-23 18:32:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942933193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585241541] [2024-11-23 18:32:29,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:29,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:29,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:29,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:32:30,047 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:32:30,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:30,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:32:30,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:30,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:30,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585241541] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:30,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:32:30,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2024-11-23 18:32:30,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146348944] [2024-11-23 18:32:30,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:30,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:32:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:30,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:32:30,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:32:30,179 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:30,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 362 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) [2024-11-23 18:32:30,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:30,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:30,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:30,406 INFO L124 PetriNetUnfolderBase]: 633/1135 cut-off events. [2024-11-23 18:32:30,406 INFO L125 PetriNetUnfolderBase]: For 2404/2404 co-relation queries the response was YES. [2024-11-23 18:32:30,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 1135 events. 633/1135 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5429 event pairs, 123 based on Foata normal form. 14/1149 useless extension candidates. Maximal degree in co-relation 3589. Up to 710 conditions per place. [2024-11-23 18:32:30,415 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 56 selfloop transitions, 18 changer transitions 1/76 dead transitions. [2024-11-23 18:32:30,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 666 flow [2024-11-23 18:32:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:32:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:32:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-23 18:32:30,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-23 18:32:30,417 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 362 flow. Second operand 4 states and 96 transitions. [2024-11-23 18:32:30,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 666 flow [2024-11-23 18:32:30,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 631 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-23 18:32:30,428 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 451 flow [2024-11-23 18:32:30,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=451, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-11-23 18:32:30,430 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-11-23 18:32:30,431 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 451 flow [2024-11-23 18:32:30,431 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) [2024-11-23 18:32:30,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:30,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:30,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:32:30,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 18:32:30,632 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:30,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash 880065340, now seen corresponding path program 3 times [2024-11-23 18:32:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:30,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062036243] [2024-11-23 18:32:30,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:32:30,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:30,666 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:32:30,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:30,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:30,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062036243] [2024-11-23 18:32:30,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062036243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:30,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70745469] [2024-11-23 18:32:30,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:32:30,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:30,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:30,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:30,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:32:31,070 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:32:31,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:31,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:32:31,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:32,152 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:32:32,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70745469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:32,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:32:32,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2024-11-23 18:32:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539628243] [2024-11-23 18:32:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:32,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:32:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:32,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:32:32,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:32,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:32,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:32,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:32,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:32,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:32,683 INFO L124 PetriNetUnfolderBase]: 635/1127 cut-off events. [2024-11-23 18:32:32,683 INFO L125 PetriNetUnfolderBase]: For 3685/3685 co-relation queries the response was YES. [2024-11-23 18:32:32,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1127 events. 635/1127 cut-off events. For 3685/3685 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5541 event pairs, 192 based on Foata normal form. 22/1149 useless extension candidates. Maximal degree in co-relation 4026. Up to 614 conditions per place. [2024-11-23 18:32:32,694 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 77 selfloop transitions, 19 changer transitions 8/105 dead transitions. [2024-11-23 18:32:32,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 1019 flow [2024-11-23 18:32:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:32:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:32:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-11-23 18:32:32,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-23 18:32:32,696 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 451 flow. Second operand 6 states and 144 transitions. [2024-11-23 18:32:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 1019 flow [2024-11-23 18:32:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 989 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-11-23 18:32:32,711 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 616 flow [2024-11-23 18:32:32,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-11-23 18:32:32,712 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-11-23 18:32:32,712 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 616 flow [2024-11-23 18:32:32,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:32,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:32,712 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:32,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 18:32:32,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 18:32:32,914 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:32,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash -262302972, now seen corresponding path program 4 times [2024-11-23 18:32:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:32,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077104975] [2024-11-23 18:32:32,915 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:32:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:32,941 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:32:32,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:33,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077104975] [2024-11-23 18:32:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077104975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:33,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063537730] [2024-11-23 18:32:33,084 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:32:33,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:33,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:33,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:32:33,179 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:32:33,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:33,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:32:33,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:33,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063537730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:33,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:33,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-23 18:32:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409016499] [2024-11-23 18:32:33,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:33,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:32:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:33,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:32:33,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:32:33,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:33,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 616 flow. Second operand has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 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) [2024-11-23 18:32:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:33,824 INFO L124 PetriNetUnfolderBase]: 673/1227 cut-off events. [2024-11-23 18:32:33,824 INFO L125 PetriNetUnfolderBase]: For 4659/4659 co-relation queries the response was YES. [2024-11-23 18:32:33,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1227 events. 673/1227 cut-off events. For 4659/4659 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6109 event pairs, 190 based on Foata normal form. 40/1267 useless extension candidates. Maximal degree in co-relation 4438. Up to 638 conditions per place. [2024-11-23 18:32:33,834 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 83 selfloop transitions, 40 changer transitions 5/129 dead transitions. [2024-11-23 18:32:33,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 1329 flow [2024-11-23 18:32:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:32:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:32:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-11-23 18:32:33,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6006006006006006 [2024-11-23 18:32:33,836 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 616 flow. Second operand 9 states and 200 transitions. [2024-11-23 18:32:33,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 1329 flow [2024-11-23 18:32:33,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 1303 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-23 18:32:33,849 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 959 flow [2024-11-23 18:32:33,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=959, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-11-23 18:32:33,850 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-23 18:32:33,850 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 959 flow [2024-11-23 18:32:33,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 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) [2024-11-23 18:32:33,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:33,850 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:33,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:32:34,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:32:34,051 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:34,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1540419072, now seen corresponding path program 5 times [2024-11-23 18:32:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439238907] [2024-11-23 18:32:34,052 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:32:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:34,069 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:32:34,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439238907] [2024-11-23 18:32:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439238907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:34,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:32:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916109520] [2024-11-23 18:32:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:34,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:32:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:34,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:32:34,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:32:34,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:34,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 959 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:34,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:34,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:34,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:34,546 INFO L124 PetriNetUnfolderBase]: 651/1149 cut-off events. [2024-11-23 18:32:34,546 INFO L125 PetriNetUnfolderBase]: For 7797/7797 co-relation queries the response was YES. [2024-11-23 18:32:34,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 1149 events. 651/1149 cut-off events. For 7797/7797 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5511 event pairs, 132 based on Foata normal form. 4/1153 useless extension candidates. Maximal degree in co-relation 5082. Up to 494 conditions per place. [2024-11-23 18:32:34,562 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 80 selfloop transitions, 30 changer transitions 8/119 dead transitions. [2024-11-23 18:32:34,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1558 flow [2024-11-23 18:32:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:32:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:32:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-23 18:32:34,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-11-23 18:32:34,564 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 959 flow. Second operand 6 states and 133 transitions. [2024-11-23 18:32:34,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1558 flow [2024-11-23 18:32:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1468 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-11-23 18:32:34,595 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 1104 flow [2024-11-23 18:32:34,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1104, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-11-23 18:32:34,596 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-23 18:32:34,596 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 1104 flow [2024-11-23 18:32:34,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:34,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:34,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:32:34,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-23 18:32:34,597 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:34,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1464416813, now seen corresponding path program 1 times [2024-11-23 18:32:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:34,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107334406] [2024-11-23 18:32:34,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:34,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:34,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:34,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107334406] [2024-11-23 18:32:34,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107334406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:32:34,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:32:34,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:32:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931703346] [2024-11-23 18:32:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:32:34,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:32:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:34,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:32:34,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:32:34,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:34,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 1104 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:34,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:34,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:34,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:35,125 INFO L124 PetriNetUnfolderBase]: 663/1145 cut-off events. [2024-11-23 18:32:35,125 INFO L125 PetriNetUnfolderBase]: For 8334/8334 co-relation queries the response was YES. [2024-11-23 18:32:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6287 conditions, 1145 events. 663/1145 cut-off events. For 8334/8334 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5252 event pairs, 94 based on Foata normal form. 24/1169 useless extension candidates. Maximal degree in co-relation 5898. Up to 888 conditions per place. [2024-11-23 18:32:35,148 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 94 selfloop transitions, 12 changer transitions 2/109 dead transitions. [2024-11-23 18:32:35,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 1509 flow [2024-11-23 18:32:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:32:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:32:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-23 18:32:35,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-23 18:32:35,150 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 1104 flow. Second operand 4 states and 95 transitions. [2024-11-23 18:32:35,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 1509 flow [2024-11-23 18:32:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 109 transitions, 1491 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-23 18:32:35,183 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 1177 flow [2024-11-23 18:32:35,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1177, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-11-23 18:32:35,184 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-23 18:32:35,184 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 1177 flow [2024-11-23 18:32:35,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:32:35,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:35,185 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] [2024-11-23 18:32:35,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 18:32:35,185 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:35,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1538185563, now seen corresponding path program 1 times [2024-11-23 18:32:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044085562] [2024-11-23 18:32:35,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:32:36,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:36,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044085562] [2024-11-23 18:32:36,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044085562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:36,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956648549] [2024-11-23 18:32:36,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:32:36,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:36,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:36,005 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:36,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:32:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:32:36,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-23 18:32:36,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:36,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:32:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:36,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:37,362 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 72 treesize of output 64 [2024-11-23 18:32:37,425 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-23 18:32:37,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 91 [2024-11-23 18:32:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956648549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:32:38,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:32:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-23 18:32:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243560497] [2024-11-23 18:32:38,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:32:38,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 18:32:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:32:38,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 18:32:38,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-23 18:32:39,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:32:39,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 1177 flow. Second operand has 25 states, 25 states have (on average 16.52) internal successors, (413), 25 states have internal predecessors, (413), 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) [2024-11-23 18:32:39,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:32:39,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:32:39,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:32:46,280 INFO L124 PetriNetUnfolderBase]: 1165/2021 cut-off events. [2024-11-23 18:32:46,280 INFO L125 PetriNetUnfolderBase]: For 14231/14231 co-relation queries the response was YES. [2024-11-23 18:32:46,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2021 events. 1165/2021 cut-off events. For 14231/14231 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10396 event pairs, 65 based on Foata normal form. 9/2030 useless extension candidates. Maximal degree in co-relation 8714. Up to 423 conditions per place. [2024-11-23 18:32:46,299 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 133 selfloop transitions, 75 changer transitions 175/384 dead transitions. [2024-11-23 18:32:46,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 384 transitions, 4387 flow [2024-11-23 18:32:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-23 18:32:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-23 18:32:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 926 transitions. [2024-11-23 18:32:46,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5561561561561561 [2024-11-23 18:32:46,305 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 1177 flow. Second operand 45 states and 926 transitions. [2024-11-23 18:32:46,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 384 transitions, 4387 flow [2024-11-23 18:32:46,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 384 transitions, 4371 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-23 18:32:46,362 INFO L231 Difference]: Finished difference. Result has 143 places, 111 transitions, 1405 flow [2024-11-23 18:32:46,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1405, PETRI_PLACES=143, PETRI_TRANSITIONS=111} [2024-11-23 18:32:46,363 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2024-11-23 18:32:46,363 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 111 transitions, 1405 flow [2024-11-23 18:32:46,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.52) internal successors, (413), 25 states have internal predecessors, (413), 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) [2024-11-23 18:32:46,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:32:46,366 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] [2024-11-23 18:32:46,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 18:32:46,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:46,570 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:32:46,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:32:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2117076909, now seen corresponding path program 2 times [2024-11-23 18:32:46,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:32:46,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042831508] [2024-11-23 18:32:46,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:46,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:32:46,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:32:46,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 18:32:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:32:46,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042831508] [2024-11-23 18:32:46,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042831508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:32:46,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643668663] [2024-11-23 18:32:46,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:32:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:32:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:32:46,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:32:46,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:32:47,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:32:47,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:32:47,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-23 18:32:47,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:32:47,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:32:47,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:32:47,535 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-23 18:32:47,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-23 18:32:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:32:47,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:32:48,457 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 250 treesize of output 230 [2024-11-23 18:32:48,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:32:48,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 5292 treesize of output 3728 [2024-11-23 18:38:29,531 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-23 18:38:29,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-23 18:38:29,532 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-23 18:38:29,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:38:29,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 18:38:29,733 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-23 18:38:29,741 INFO L158 Benchmark]: Toolchain (without parser) took 378597.70ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 92.1MB in the beginning and 1.0GB in the end (delta: -956.8MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-23 18:38:29,741 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 117.4MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:38:29,741 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.10ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 80.0MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:38:29,741 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.30ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:38:29,742 INFO L158 Benchmark]: Boogie Preprocessor took 68.96ms. Allocated memory is still 117.4MB. Free memory was 78.4MB in the beginning and 76.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:38:29,746 INFO L158 Benchmark]: RCFGBuilder took 1054.01ms. Allocated memory is still 117.4MB. Free memory was 76.4MB in the beginning and 86.5MB in the end (delta: -10.0MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2024-11-23 18:38:29,747 INFO L158 Benchmark]: TraceAbstraction took 377021.82ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 85.9MB in the beginning and 1.0GB in the end (delta: -963.0MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-23 18:38:29,748 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 117.4MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.10ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 80.0MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.30ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.96ms. Allocated memory is still 117.4MB. Free memory was 78.4MB in the beginning and 76.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1054.01ms. Allocated memory is still 117.4MB. Free memory was 76.4MB in the beginning and 86.5MB in the end (delta: -10.0MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. * TraceAbstraction took 377021.82ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 85.9MB in the beginning and 1.0GB in the end (delta: -963.0MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC --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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:38:32,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:38:32,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-23 18:38:32,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:38:32,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:38:32,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:38:32,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:38:32,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:38:32,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:38:32,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:38:32,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:38:32,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:38:32,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:38:32,565 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:38:32,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:38:32,566 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:38:32,566 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:38:32,570 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:38:32,571 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:38:32,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:38:32,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:38:32,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:38:32,572 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:38:32,572 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_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC 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 -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-23 18:38:32,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:38:32,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:38:32,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:38:32,902 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:38:32,903 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:38:32,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-23 18:38:35,895 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/fafabea95/870d3b35c6dd4de595c6b174e5210f49/FLAG590d2e31f [2024-11-23 18:38:36,223 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:38:36,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-23 18:38:36,234 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/fafabea95/870d3b35c6dd4de595c6b174e5210f49/FLAG590d2e31f [2024-11-23 18:38:36,254 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/data/fafabea95/870d3b35c6dd4de595c6b174e5210f49 [2024-11-23 18:38:36,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:38:36,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:38:36,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:38:36,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:38:36,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:38:36,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7654d982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36, skipping insertion in model container [2024-11-23 18:38:36,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,282 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:38:36,471 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:38:36,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:38:36,486 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:38:36,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:38:36,541 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:38:36,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36 WrapperNode [2024-11-23 18:38:36,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:38:36,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:38:36,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:38:36,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:38:36,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,569 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,612 INFO L138 Inliner]: procedures = 25, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 134 [2024-11-23 18:38:36,614 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:38:36,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:38:36,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:38:36,615 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:38:36,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,655 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 18:38:36,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,669 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:38:36,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:38:36,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:38:36,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:38:36,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (1/1) ... [2024-11-23 18:38:36,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:38:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:36,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:38:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:38:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:38:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:38:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:38:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-23 18:38:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-23 18:38:36,769 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:38:36,889 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:38:36,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:38:37,318 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:38:37,318 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:38:37,693 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:38:37,693 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 18:38:37,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:38:37 BoogieIcfgContainer [2024-11-23 18:38:37,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:38:37,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:38:37,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:38:37,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:38:37,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:38:36" (1/3) ... [2024-11-23 18:38:37,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32801f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:38:37, skipping insertion in model container [2024-11-23 18:38:37,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:38:36" (2/3) ... [2024-11-23 18:38:37,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32801f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:38:37, skipping insertion in model container [2024-11-23 18:38:37,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:38:37" (3/3) ... [2024-11-23 18:38:37,709 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-23 18:38:37,725 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:38:37,727 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-23 18:38:37,728 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:38:37,789 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:38:37,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-23 18:38:37,869 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-23 18:38:37,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:38:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-23 18:38:37,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-23 18:38:37,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-23 18:38:37,896 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:38:37,912 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;@5cce040a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:38:37,913 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-23 18:38:37,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:38:37,924 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 18:38:37,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:38:37,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:37,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:38:37,925 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:37,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash 475559, now seen corresponding path program 1 times [2024-11-23 18:38:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:37,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047528779] [2024-11-23 18:38:37,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:37,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:37,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:37,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:38:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:38,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:38:38,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:38,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-23 18:38:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:38,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:38:38,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047528779] [2024-11-23 18:38:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047528779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:38:38,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:38:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:38:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117341269] [2024-11-23 18:38:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:38:38,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:38:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:38,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:38:38,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:38:38,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:38:38,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:38:38,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:38,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:38:38,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:38,384 INFO L124 PetriNetUnfolderBase]: 88/211 cut-off events. [2024-11-23 18:38:38,385 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-23 18:38:38,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 211 events. 88/211 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 872 event pairs, 64 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2024-11-23 18:38:38,392 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-23 18:38:38,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-23 18:38:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:38:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:38:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-23 18:38:38,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-23 18:38:38,406 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-23 18:38:38,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-23 18:38:38,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:38:38,414 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-23 18:38:38,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-23 18:38:38,423 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-23 18:38:38,423 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-23 18:38:38,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:38:38,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:38,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:38:38,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:38:38,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:38,625 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:38,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash 475560, now seen corresponding path program 1 times [2024-11-23 18:38:38,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:38,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721938735] [2024-11-23 18:38:38,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:38,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:38,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:38,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:38:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:38,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:38:38,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:38,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:38,844 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:38:38,845 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721938735] [2024-11-23 18:38:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721938735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:38:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:38:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:38:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139497010] [2024-11-23 18:38:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:38:38,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:38:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:38,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:38:38,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:38:38,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:38:38,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:38:38,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:38,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:38:38,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:39,086 INFO L124 PetriNetUnfolderBase]: 89/214 cut-off events. [2024-11-23 18:38:39,086 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:38:39,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 214 events. 89/214 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 878 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 158 conditions per place. [2024-11-23 18:38:39,089 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-23 18:38:39,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-23 18:38:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:38:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:38:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-23 18:38:39,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-23 18:38:39,091 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-23 18:38:39,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-23 18:38:39,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:38:39,093 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-23 18:38:39,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-23 18:38:39,094 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-23 18:38:39,094 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-23 18:38:39,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-23 18:38:39,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:39,095 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 18:38:39,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:38:39,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:39,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:39,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 457027440, now seen corresponding path program 1 times [2024-11-23 18:38:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365065320] [2024-11-23 18:38:39,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:39,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:39,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:38:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:39,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:38:39,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:39,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:39,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:39,852 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:39,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365065320] [2024-11-23 18:38:39,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365065320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:39,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:39,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-23 18:38:39,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162178383] [2024-11-23 18:38:39,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:39,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 18:38:39,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:39,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 18:38:39,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:38:40,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:38:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2024-11-23 18:38:40,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:40,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:38:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:40,884 INFO L124 PetriNetUnfolderBase]: 91/222 cut-off events. [2024-11-23 18:38:40,884 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:38:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 222 events. 91/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 911 event pairs, 64 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 397. Up to 160 conditions per place. [2024-11-23 18:38:40,889 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 22 selfloop transitions, 11 changer transitions 0/42 dead transitions. [2024-11-23 18:38:40,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 178 flow [2024-11-23 18:38:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:38:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:38:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-11-23 18:38:40,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2024-11-23 18:38:40,892 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 9 states and 154 transitions. [2024-11-23 18:38:40,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 178 flow [2024-11-23 18:38:40,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:38:40,894 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 152 flow [2024-11-23 18:38:40,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-23 18:38:40,897 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-11-23 18:38:40,897 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 152 flow [2024-11-23 18:38:40,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2024-11-23 18:38:40,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:40,898 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:38:40,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:38:41,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:41,099 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:41,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 260967877, now seen corresponding path program 1 times [2024-11-23 18:38:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:41,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708890475] [2024-11-23 18:38:41,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:41,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:41,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:38:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:41,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:38:41,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:41,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-23 18:38:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:38:41,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:38:41,249 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:41,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708890475] [2024-11-23 18:38:41,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708890475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:38:41,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:38:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:38:41,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840607157] [2024-11-23 18:38:41,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:38:41,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:38:41,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:41,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:38:41,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:38:41,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-23 18:38:41,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-23 18:38:41,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:41,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-23 18:38:41,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:41,494 INFO L124 PetriNetUnfolderBase]: 91/195 cut-off events. [2024-11-23 18:38:41,494 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-23 18:38:41,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 195 events. 91/195 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 665 event pairs, 64 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 374. Up to 155 conditions per place. [2024-11-23 18:38:41,497 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 27 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-11-23 18:38:41,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 208 flow [2024-11-23 18:38:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:38:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:38:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-23 18:38:41,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-23 18:38:41,499 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 152 flow. Second operand 4 states and 61 transitions. [2024-11-23 18:38:41,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 208 flow [2024-11-23 18:38:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 194 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-23 18:38:41,502 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 140 flow [2024-11-23 18:38:41,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-23 18:38:41,503 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-11-23 18:38:41,503 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 140 flow [2024-11-23 18:38:41,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-23 18:38:41,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:41,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:38:41,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:38:41,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:41,704 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:41,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 260967878, now seen corresponding path program 1 times [2024-11-23 18:38:41,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:41,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620855041] [2024-11-23 18:38:41,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:41,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:41,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:41,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:38:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:41,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 18:38:41,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:41,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:42,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:42,624 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620855041] [2024-11-23 18:38:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620855041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:42,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:42,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-23 18:38:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489029775] [2024-11-23 18:38:42,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:42,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:38:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:42,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:38:42,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:38:43,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-11-23 18:38:43,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 140 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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) [2024-11-23 18:38:43,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:43,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-11-23 18:38:43,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:43,908 INFO L124 PetriNetUnfolderBase]: 283/562 cut-off events. [2024-11-23 18:38:43,908 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-23 18:38:43,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 562 events. 283/562 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2630 event pairs, 133 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 1008. Up to 217 conditions per place. [2024-11-23 18:38:43,912 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 56 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-23 18:38:43,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 352 flow [2024-11-23 18:38:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:38:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:38:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-23 18:38:43,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5574324324324325 [2024-11-23 18:38:43,917 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 140 flow. Second operand 8 states and 165 transitions. [2024-11-23 18:38:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 352 flow [2024-11-23 18:38:43,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:38:43,921 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 173 flow [2024-11-23 18:38:43,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=173, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-23 18:38:43,922 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-23 18:38:43,922 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 173 flow [2024-11-23 18:38:43,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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) [2024-11-23 18:38:43,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:43,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:38:43,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 18:38:44,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:44,123 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:44,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1682043018, now seen corresponding path program 1 times [2024-11-23 18:38:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:44,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066461999] [2024-11-23 18:38:44,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:44,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:44,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:44,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:38:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:44,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 18:38:44,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:44,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:38:44,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:38:45,453 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066461999] [2024-11-23 18:38:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066461999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:45,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:45,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-23 18:38:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288831941] [2024-11-23 18:38:45,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:45,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:38:45,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:45,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:38:45,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:38:47,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-11-23 18:38:47,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 173 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:38:47,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:47,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-11-23 18:38:47,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:49,120 INFO L124 PetriNetUnfolderBase]: 415/835 cut-off events. [2024-11-23 18:38:49,121 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-23 18:38:49,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 835 events. 415/835 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4123 event pairs, 256 based on Foata normal form. 28/750 useless extension candidates. Maximal degree in co-relation 1279. Up to 201 conditions per place. [2024-11-23 18:38:49,126 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 72 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-11-23 18:38:49,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 92 transitions, 467 flow [2024-11-23 18:38:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:38:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:38:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-11-23 18:38:49,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5594594594594594 [2024-11-23 18:38:49,129 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 173 flow. Second operand 10 states and 207 transitions. [2024-11-23 18:38:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 92 transitions, 467 flow [2024-11-23 18:38:49,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:38:49,132 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 223 flow [2024-11-23 18:38:49,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-23 18:38:49,133 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-11-23 18:38:49,133 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 223 flow [2024-11-23 18:38:49,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:38:49,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:49,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:38:49,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 18:38:49,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:49,335 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:49,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1659492384, now seen corresponding path program 1 times [2024-11-23 18:38:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156837822] [2024-11-23 18:38:49,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:49,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:49,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:38:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:49,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 18:38:49,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:49,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:49,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:50,163 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:50,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156837822] [2024-11-23 18:38:50,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156837822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:50,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:50,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-23 18:38:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680781593] [2024-11-23 18:38:50,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:50,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:38:50,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:50,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:38:50,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:38:50,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-23 18:38:50,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:38:50,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:50,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-23 18:38:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:51,317 INFO L124 PetriNetUnfolderBase]: 710/1254 cut-off events. [2024-11-23 18:38:51,318 INFO L125 PetriNetUnfolderBase]: For 712/712 co-relation queries the response was YES. [2024-11-23 18:38:51,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1254 events. 710/1254 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5973 event pairs, 259 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 2561. Up to 885 conditions per place. [2024-11-23 18:38:51,326 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 62 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-11-23 18:38:51,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 471 flow [2024-11-23 18:38:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:38:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:38:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-23 18:38:51,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2024-11-23 18:38:51,328 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 223 flow. Second operand 8 states and 147 transitions. [2024-11-23 18:38:51,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 471 flow [2024-11-23 18:38:51,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 456 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-23 18:38:51,332 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 247 flow [2024-11-23 18:38:51,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2024-11-23 18:38:51,333 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-23 18:38:51,333 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 247 flow [2024-11-23 18:38:51,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:38:51,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:51,333 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:38:51,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 18:38:51,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:51,537 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:51,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash -95343153, now seen corresponding path program 1 times [2024-11-23 18:38:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391755466] [2024-11-23 18:38:51,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:38:51,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:51,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:38:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:38:51,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 18:38:51,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:51,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:51,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:52,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391755466] [2024-11-23 18:38:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391755466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:52,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-23 18:38:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819994928] [2024-11-23 18:38:52,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:52,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:38:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:52,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:38:52,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:38:53,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-23 18:38:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 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) [2024-11-23 18:38:53,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:53,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-23 18:38:53,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:38:55,303 INFO L124 PetriNetUnfolderBase]: 572/1020 cut-off events. [2024-11-23 18:38:55,303 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2024-11-23 18:38:55,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 1020 events. 572/1020 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4585 event pairs, 301 based on Foata normal form. 32/961 useless extension candidates. Maximal degree in co-relation 2085. Up to 221 conditions per place. [2024-11-23 18:38:55,312 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 74 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-11-23 18:38:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 553 flow [2024-11-23 18:38:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:38:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:38:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-11-23 18:38:55,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5054054054054054 [2024-11-23 18:38:55,315 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 247 flow. Second operand 10 states and 187 transitions. [2024-11-23 18:38:55,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 553 flow [2024-11-23 18:38:55,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 540 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:38:55,319 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 290 flow [2024-11-23 18:38:55,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-11-23 18:38:55,321 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-11-23 18:38:55,323 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 290 flow [2024-11-23 18:38:55,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 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) [2024-11-23 18:38:55,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:38:55,324 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-23 18:38:55,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:38:55,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:55,525 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:38:55,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:38:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1818686264, now seen corresponding path program 2 times [2024-11-23 18:38:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:38:55,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559413324] [2024-11-23 18:38:55,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:38:55,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:38:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:38:55,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:38:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:38:55,603 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:38:55,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:38:55,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:38:55,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:38:55,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:38:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:55,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:38:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:38:56,772 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:38:56,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559413324] [2024-11-23 18:38:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559413324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:38:56,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:38:56,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-23 18:38:56,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967303211] [2024-11-23 18:38:56,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:38:56,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 18:38:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:38:56,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 18:38:56,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:38:57,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:38:57,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 290 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:38:57,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:38:57,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:38:57,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:00,641 INFO L124 PetriNetUnfolderBase]: 539/1005 cut-off events. [2024-11-23 18:39:00,641 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2024-11-23 18:39:00,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 1005 events. 539/1005 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4764 event pairs, 436 based on Foata normal form. 6/1011 useless extension candidates. Maximal degree in co-relation 2217. Up to 942 conditions per place. [2024-11-23 18:39:00,647 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 34 selfloop transitions, 29 changer transitions 0/68 dead transitions. [2024-11-23 18:39:00,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 68 transitions, 590 flow [2024-11-23 18:39:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-23 18:39:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-23 18:39:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 330 transitions. [2024-11-23 18:39:00,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4247104247104247 [2024-11-23 18:39:00,650 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 290 flow. Second operand 21 states and 330 transitions. [2024-11-23 18:39:00,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 68 transitions, 590 flow [2024-11-23 18:39:00,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 68 transitions, 565 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:00,656 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 527 flow [2024-11-23 18:39:00,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=527, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-11-23 18:39:00,656 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-11-23 18:39:00,657 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 527 flow [2024-11-23 18:39:00,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:00,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:00,657 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:00,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:39:00,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:00,858 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:00,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash 532779374, now seen corresponding path program 2 times [2024-11-23 18:39:00,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799989591] [2024-11-23 18:39:00,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:00,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:00,860 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:00,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:39:00,915 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:39:00,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:00,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:39:00,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:00,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 18:39:01,233 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:01,234 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:01,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799989591] [2024-11-23 18:39:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799989591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:01,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:01,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:39:01,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339062967] [2024-11-23 18:39:01,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:01,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:01,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:01,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:01,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:39:01,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:01,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:01,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:39:01,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:01,830 INFO L124 PetriNetUnfolderBase]: 625/1148 cut-off events. [2024-11-23 18:39:01,830 INFO L125 PetriNetUnfolderBase]: For 755/755 co-relation queries the response was YES. [2024-11-23 18:39:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3292 conditions, 1148 events. 625/1148 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5622 event pairs, 258 based on Foata normal form. 14/1162 useless extension candidates. Maximal degree in co-relation 3220. Up to 545 conditions per place. [2024-11-23 18:39:01,839 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-11-23 18:39:01,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 782 flow [2024-11-23 18:39:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-23 18:39:01,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-11-23 18:39:01,840 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 527 flow. Second operand 4 states and 90 transitions. [2024-11-23 18:39:01,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 782 flow [2024-11-23 18:39:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 694 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-23 18:39:01,848 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 488 flow [2024-11-23 18:39:01,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=488, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2024-11-23 18:39:01,849 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-23 18:39:01,849 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 488 flow [2024-11-23 18:39:01,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:01,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:01,850 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:01,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 18:39:02,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:02,050 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:02,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash -8431389, now seen corresponding path program 1 times [2024-11-23 18:39:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:02,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950761960] [2024-11-23 18:39:02,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:39:02,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:02,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:02,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:39:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:39:02,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:02,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:02,175 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:02,175 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950761960] [2024-11-23 18:39:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950761960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:02,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:39:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992589818] [2024-11-23 18:39:02,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:02,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:39:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:02,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:39:02,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:39:02,204 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:02,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:02,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:02,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:02,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:02,445 INFO L124 PetriNetUnfolderBase]: 644/1210 cut-off events. [2024-11-23 18:39:02,445 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2024-11-23 18:39:02,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 1210 events. 644/1210 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5925 event pairs, 186 based on Foata normal form. 3/1213 useless extension candidates. Maximal degree in co-relation 3517. Up to 848 conditions per place. [2024-11-23 18:39:02,454 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 76 selfloop transitions, 7 changer transitions 1/90 dead transitions. [2024-11-23 18:39:02,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 90 transitions, 748 flow [2024-11-23 18:39:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:39:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:39:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-23 18:39:02,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-23 18:39:02,456 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 488 flow. Second operand 3 states and 77 transitions. [2024-11-23 18:39:02,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 90 transitions, 748 flow [2024-11-23 18:39:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 719 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:02,463 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 537 flow [2024-11-23 18:39:02,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-23 18:39:02,464 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-23 18:39:02,464 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 537 flow [2024-11-23 18:39:02,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:02,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:02,465 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:02,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:39:02,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:02,665 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:02,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash 899885618, now seen corresponding path program 2 times [2024-11-23 18:39:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44042272] [2024-11-23 18:39:02,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:02,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:39:02,739 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:39:02,739 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:02,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:39:02,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:02,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 18:39:02,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:39:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 18:39:03,720 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44042272] [2024-11-23 18:39:03,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44042272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:39:03,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:39:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-23 18:39:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216903489] [2024-11-23 18:39:03,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:39:03,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 18:39:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:03,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 18:39:03,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:39:04,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:39:04,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 537 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:04,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:04,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:39:04,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:05,310 INFO L124 PetriNetUnfolderBase]: 644/1193 cut-off events. [2024-11-23 18:39:05,311 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2024-11-23 18:39:05,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1193 events. 644/1193 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5890 event pairs, 351 based on Foata normal form. 14/1207 useless extension candidates. Maximal degree in co-relation 3540. Up to 839 conditions per place. [2024-11-23 18:39:05,320 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-11-23 18:39:05,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 787 flow [2024-11-23 18:39:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:39:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:39:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-23 18:39:05,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-23 18:39:05,322 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 537 flow. Second operand 5 states and 96 transitions. [2024-11-23 18:39:05,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 787 flow [2024-11-23 18:39:05,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 769 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:39:05,328 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 560 flow [2024-11-23 18:39:05,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-23 18:39:05,329 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-23 18:39:05,329 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 560 flow [2024-11-23 18:39:05,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:05,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:05,330 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:05,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 18:39:05,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:05,531 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:05,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash 877334984, now seen corresponding path program 2 times [2024-11-23 18:39:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047692609] [2024-11-23 18:39:05,532 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:05,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:05,534 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:05,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:39:05,594 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:39:05,594 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:05,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:39:05,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:05,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 18:39:05,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:05,892 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:05,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047692609] [2024-11-23 18:39:05,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047692609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:05,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:05,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:39:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182508800] [2024-11-23 18:39:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:05,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:05,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:05,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:05,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:39:05,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:05,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:05,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:39:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:06,315 INFO L124 PetriNetUnfolderBase]: 743/1321 cut-off events. [2024-11-23 18:39:06,315 INFO L125 PetriNetUnfolderBase]: For 1777/1777 co-relation queries the response was YES. [2024-11-23 18:39:06,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1321 events. 743/1321 cut-off events. For 1777/1777 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6003 event pairs, 243 based on Foata normal form. 16/1337 useless extension candidates. Maximal degree in co-relation 4060. Up to 763 conditions per place. [2024-11-23 18:39:06,325 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 72 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-11-23 18:39:06,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 818 flow [2024-11-23 18:39:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-23 18:39:06,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-23 18:39:06,328 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 560 flow. Second operand 4 states and 80 transitions. [2024-11-23 18:39:06,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 818 flow [2024-11-23 18:39:06,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 91 transitions, 760 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:06,335 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 574 flow [2024-11-23 18:39:06,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=574, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-23 18:39:06,336 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-23 18:39:06,336 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 574 flow [2024-11-23 18:39:06,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:06,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:06,336 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:06,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:39:06,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:06,537 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:06,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1427581223, now seen corresponding path program 2 times [2024-11-23 18:39:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:06,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655200041] [2024-11-23 18:39:06,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:06,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:06,539 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:39:06,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:39:06,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:06,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:39:06,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:06,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 18:39:06,863 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:06,863 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655200041] [2024-11-23 18:39:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655200041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:06,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:06,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:39:06,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977302498] [2024-11-23 18:39:06,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:06,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:39:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:06,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:39:06,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:39:07,041 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-23 18:39:07,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:07,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:07,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-23 18:39:07,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:07,475 INFO L124 PetriNetUnfolderBase]: 674/1204 cut-off events. [2024-11-23 18:39:07,475 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2024-11-23 18:39:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3599 conditions, 1204 events. 674/1204 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5452 event pairs, 294 based on Foata normal form. 48/1252 useless extension candidates. Maximal degree in co-relation 3536. Up to 655 conditions per place. [2024-11-23 18:39:07,483 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-11-23 18:39:07,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 817 flow [2024-11-23 18:39:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:39:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:39:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-23 18:39:07,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-23 18:39:07,485 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 574 flow. Second operand 5 states and 85 transitions. [2024-11-23 18:39:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 817 flow [2024-11-23 18:39:07,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 788 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 18:39:07,491 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 555 flow [2024-11-23 18:39:07,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2024-11-23 18:39:07,492 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-11-23 18:39:07,493 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 555 flow [2024-11-23 18:39:07,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:07,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:07,493 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:07,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:39:07,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:07,694 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:07,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1754176379, now seen corresponding path program 1 times [2024-11-23 18:39:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555257869] [2024-11-23 18:39:07,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:39:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:07,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:07,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:39:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:39:07,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:07,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:07,798 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:07,798 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:07,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555257869] [2024-11-23 18:39:07,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555257869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:07,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:07,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:07,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691144897] [2024-11-23 18:39:07,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:07,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:07,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:07,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:07,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:07,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 555 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) [2024-11-23 18:39:07,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:07,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:07,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:08,004 INFO L124 PetriNetUnfolderBase]: 752/1336 cut-off events. [2024-11-23 18:39:08,004 INFO L125 PetriNetUnfolderBase]: For 1395/1395 co-relation queries the response was YES. [2024-11-23 18:39:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 1336 events. 752/1336 cut-off events. For 1395/1395 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6286 event pairs, 162 based on Foata normal form. 27/1363 useless extension candidates. Maximal degree in co-relation 4056. Up to 1011 conditions per place. [2024-11-23 18:39:08,011 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 92 selfloop transitions, 13 changer transitions 1/108 dead transitions. [2024-11-23 18:39:08,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 949 flow [2024-11-23 18:39:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-23 18:39:08,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-23 18:39:08,012 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 555 flow. Second operand 4 states and 96 transitions. [2024-11-23 18:39:08,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 949 flow [2024-11-23 18:39:08,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:08,019 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 675 flow [2024-11-23 18:39:08,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-11-23 18:39:08,019 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-23 18:39:08,020 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 675 flow [2024-11-23 18:39:08,020 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) [2024-11-23 18:39:08,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:08,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:08,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 18:39:08,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:08,224 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:08,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash -448452269, now seen corresponding path program 2 times [2024-11-23 18:39:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898153518] [2024-11-23 18:39:08,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:08,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:08,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:39:08,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:39:08,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:08,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:08,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:08,330 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:08,330 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:08,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898153518] [2024-11-23 18:39:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898153518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741628035] [2024-11-23 18:39:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:08,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:08,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:08,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:08,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:08,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 675 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) [2024-11-23 18:39:08,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:08,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:08,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:08,565 INFO L124 PetriNetUnfolderBase]: 740/1324 cut-off events. [2024-11-23 18:39:08,565 INFO L125 PetriNetUnfolderBase]: For 1966/1966 co-relation queries the response was YES. [2024-11-23 18:39:08,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 1324 events. 740/1324 cut-off events. For 1966/1966 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6316 event pairs, 331 based on Foata normal form. 12/1336 useless extension candidates. Maximal degree in co-relation 4395. Up to 862 conditions per place. [2024-11-23 18:39:08,574 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 99 selfloop transitions, 15 changer transitions 1/117 dead transitions. [2024-11-23 18:39:08,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1086 flow [2024-11-23 18:39:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-23 18:39:08,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-11-23 18:39:08,576 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 675 flow. Second operand 4 states and 94 transitions. [2024-11-23 18:39:08,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1086 flow [2024-11-23 18:39:08,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 1086 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:39:08,583 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 739 flow [2024-11-23 18:39:08,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=739, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-23 18:39:08,584 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-11-23 18:39:08,584 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 739 flow [2024-11-23 18:39:08,585 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) [2024-11-23 18:39:08,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:08,585 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:08,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:08,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:08,785 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:08,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2102765381, now seen corresponding path program 3 times [2024-11-23 18:39:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:08,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696050785] [2024-11-23 18:39:08,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:39:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:08,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:08,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:39:08,860 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:39:08,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:08,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:08,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:08,891 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:08,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:08,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696050785] [2024-11-23 18:39:08,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696050785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:08,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:08,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:08,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966371594] [2024-11-23 18:39:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:08,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:08,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:08,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:08,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:08,892 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:08,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 739 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) [2024-11-23 18:39:08,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:08,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:08,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:09,144 INFO L124 PetriNetUnfolderBase]: 737/1306 cut-off events. [2024-11-23 18:39:09,144 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2024-11-23 18:39:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1306 events. 737/1306 cut-off events. For 2959/2959 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6097 event pairs, 331 based on Foata normal form. 27/1333 useless extension candidates. Maximal degree in co-relation 4778. Up to 862 conditions per place. [2024-11-23 18:39:09,153 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 92 selfloop transitions, 26 changer transitions 2/122 dead transitions. [2024-11-23 18:39:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 1206 flow [2024-11-23 18:39:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-23 18:39:09,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-23 18:39:09,155 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 739 flow. Second operand 4 states and 95 transitions. [2024-11-23 18:39:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 1206 flow [2024-11-23 18:39:09,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 122 transitions, 1150 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-23 18:39:09,165 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 837 flow [2024-11-23 18:39:09,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=837, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-11-23 18:39:09,165 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-23 18:39:09,165 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 837 flow [2024-11-23 18:39:09,166 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) [2024-11-23 18:39:09,166 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:09,166 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:09,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:09,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:09,366 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:09,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:09,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1246373148, now seen corresponding path program 1 times [2024-11-23 18:39:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810996245] [2024-11-23 18:39:09,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:39:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:09,369 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 18:39:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:39:09,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:09,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:09,476 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:09,476 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810996245] [2024-11-23 18:39:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810996245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:09,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:09,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:09,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044691264] [2024-11-23 18:39:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:09,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:09,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:09,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:09,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:09,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:09,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 837 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:09,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:09,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:09,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:09,727 INFO L124 PetriNetUnfolderBase]: 695/1240 cut-off events. [2024-11-23 18:39:09,727 INFO L125 PetriNetUnfolderBase]: For 3492/3492 co-relation queries the response was YES. [2024-11-23 18:39:09,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1240 events. 695/1240 cut-off events. For 3492/3492 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6017 event pairs, 217 based on Foata normal form. 18/1258 useless extension candidates. Maximal degree in co-relation 4724. Up to 784 conditions per place. [2024-11-23 18:39:09,733 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 124 selfloop transitions, 8 changer transitions 3/137 dead transitions. [2024-11-23 18:39:09,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 137 transitions, 1400 flow [2024-11-23 18:39:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-23 18:39:09,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6824324324324325 [2024-11-23 18:39:09,734 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 837 flow. Second operand 4 states and 101 transitions. [2024-11-23 18:39:09,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 137 transitions, 1400 flow [2024-11-23 18:39:09,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1338 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-23 18:39:09,741 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 836 flow [2024-11-23 18:39:09,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=836, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-23 18:39:09,741 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-11-23 18:39:09,742 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 836 flow [2024-11-23 18:39:09,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:09,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:09,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:09,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 18:39:09,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:09,943 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:09,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash -426252086, now seen corresponding path program 2 times [2024-11-23 18:39:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799343442] [2024-11-23 18:39:09,944 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:09,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:09,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:09,946 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:09,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 18:39:10,017 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:39:10,017 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:10,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:10,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:10,044 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:10,045 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799343442] [2024-11-23 18:39:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799343442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:10,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291133714] [2024-11-23 18:39:10,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:10,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:10,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:10,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:10,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:10,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 836 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:10,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:10,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:10,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:10,308 INFO L124 PetriNetUnfolderBase]: 803/1420 cut-off events. [2024-11-23 18:39:10,308 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-11-23 18:39:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5946 conditions, 1420 events. 803/1420 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6809 event pairs, 209 based on Foata normal form. 36/1456 useless extension candidates. Maximal degree in co-relation 5882. Up to 1098 conditions per place. [2024-11-23 18:39:10,315 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 103 selfloop transitions, 16 changer transitions 2/123 dead transitions. [2024-11-23 18:39:10,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1288 flow [2024-11-23 18:39:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-23 18:39:10,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-23 18:39:10,316 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 836 flow. Second operand 4 states and 95 transitions. [2024-11-23 18:39:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1288 flow [2024-11-23 18:39:10,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:39:10,322 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 950 flow [2024-11-23 18:39:10,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=950, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-11-23 18:39:10,323 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2024-11-23 18:39:10,323 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 950 flow [2024-11-23 18:39:10,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:10,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:10,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:10,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 18:39:10,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:10,524 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:10,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1180963712, now seen corresponding path program 3 times [2024-11-23 18:39:10,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:10,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337255930] [2024-11-23 18:39:10,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:39:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:10,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 18:39:10,597 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-23 18:39:10,597 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:10,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:39:10,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:10,630 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:10,630 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:10,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337255930] [2024-11-23 18:39:10,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337255930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:10,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:39:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111287120] [2024-11-23 18:39:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:10,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:39:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:10,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:39:10,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:39:10,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:10,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 950 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:10,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:10,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:10,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:10,902 INFO L124 PetriNetUnfolderBase]: 785/1369 cut-off events. [2024-11-23 18:39:10,902 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2024-11-23 18:39:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1369 events. 785/1369 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6489 event pairs, 223 based on Foata normal form. 36/1405 useless extension candidates. Maximal degree in co-relation 5930. Up to 820 conditions per place. [2024-11-23 18:39:10,907 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 114 selfloop transitions, 29 changer transitions 2/147 dead transitions. [2024-11-23 18:39:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1574 flow [2024-11-23 18:39:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:39:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:39:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-23 18:39:10,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6824324324324325 [2024-11-23 18:39:10,909 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 950 flow. Second operand 4 states and 101 transitions. [2024-11-23 18:39:10,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1574 flow [2024-11-23 18:39:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1544 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-23 18:39:10,916 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 1113 flow [2024-11-23 18:39:10,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-11-23 18:39:10,916 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-11-23 18:39:10,916 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 1113 flow [2024-11-23 18:39:10,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:39:10,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:10,916 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] [2024-11-23 18:39:10,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:11,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:11,117 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:11,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1544129964, now seen corresponding path program 1 times [2024-11-23 18:39:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23963340] [2024-11-23 18:39:11,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:39:11,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:11,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:11,119 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:11,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 18:39:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:39:11,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:39:11,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:11,295 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:11,295 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23963340] [2024-11-23 18:39:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23963340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 18:39:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205946934] [2024-11-23 18:39:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:11,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:39:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:11,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:39:11,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:39:11,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 1113 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2024-11-23 18:39:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:11,755 INFO L124 PetriNetUnfolderBase]: 965/1663 cut-off events. [2024-11-23 18:39:11,755 INFO L125 PetriNetUnfolderBase]: For 6445/6445 co-relation queries the response was YES. [2024-11-23 18:39:11,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7739 conditions, 1663 events. 965/1663 cut-off events. For 6445/6445 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8016 event pairs, 220 based on Foata normal form. 66/1729 useless extension candidates. Maximal degree in co-relation 7673. Up to 766 conditions per place. [2024-11-23 18:39:11,767 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 132 selfloop transitions, 42 changer transitions 0/176 dead transitions. [2024-11-23 18:39:11,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 1942 flow [2024-11-23 18:39:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:39:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:39:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-23 18:39:11,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-11-23 18:39:11,775 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 1113 flow. Second operand 6 states and 138 transitions. [2024-11-23 18:39:11,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 1942 flow [2024-11-23 18:39:11,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 176 transitions, 1902 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-23 18:39:11,786 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1198 flow [2024-11-23 18:39:11,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1198, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-11-23 18:39:11,787 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2024-11-23 18:39:11,787 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1198 flow [2024-11-23 18:39:11,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2024-11-23 18:39:11,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:11,788 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-11-23 18:39:11,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 18:39:11,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:11,988 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:11,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1285628280, now seen corresponding path program 3 times [2024-11-23 18:39:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657942527] [2024-11-23 18:39:11,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:39:11,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:11,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:11,991 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:11,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 18:39:12,352 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 18:39:12,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:12,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 18:39:12,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:12,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:39:13,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:39:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:39:15,556 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:15,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657942527] [2024-11-23 18:39:15,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657942527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:39:15,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:39:15,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-11-23 18:39:15,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795780491] [2024-11-23 18:39:15,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:39:15,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-23 18:39:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:15,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-23 18:39:15,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-11-23 18:39:19,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-23 18:39:19,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1198 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-11-23 18:39:19,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:19,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-23 18:39:19,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:38,824 INFO L124 PetriNetUnfolderBase]: 977/1699 cut-off events. [2024-11-23 18:39:38,825 INFO L125 PetriNetUnfolderBase]: For 8355/8355 co-relation queries the response was YES. [2024-11-23 18:39:38,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8308 conditions, 1699 events. 977/1699 cut-off events. For 8355/8355 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7923 event pairs, 605 based on Foata normal form. 12/1711 useless extension candidates. Maximal degree in co-relation 8024. Up to 1653 conditions per place. [2024-11-23 18:39:38,833 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 83 selfloop transitions, 65 changer transitions 0/149 dead transitions. [2024-11-23 18:39:38,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 149 transitions, 1866 flow [2024-11-23 18:39:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-23 18:39:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-23 18:39:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 684 transitions. [2024-11-23 18:39:38,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41081081081081083 [2024-11-23 18:39:38,837 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1198 flow. Second operand 45 states and 684 transitions. [2024-11-23 18:39:38,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 149 transitions, 1866 flow [2024-11-23 18:39:38,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 149 transitions, 1767 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:38,853 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1655 flow [2024-11-23 18:39:38,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1655, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-11-23 18:39:38,855 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 113 predicate places. [2024-11-23 18:39:38,855 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1655 flow [2024-11-23 18:39:38,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-11-23 18:39:38,855 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:38,856 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] [2024-11-23 18:39:38,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:39,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:39,056 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:39,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash -153211346, now seen corresponding path program 2 times [2024-11-23 18:39:39,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:39,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653865130] [2024-11-23 18:39:39,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:39:39,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:39,059 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:39,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 18:39:39,134 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:39:39,134 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:39,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:39:39,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:39:39,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:39:39,270 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:39,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653865130] [2024-11-23 18:39:39,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653865130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:39:39,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:39:39,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 18:39:39,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855525534] [2024-11-23 18:39:39,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:39:39,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:39:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:39,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:39:39,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-23 18:39:39,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:39,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1655 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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) [2024-11-23 18:39:39,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:39,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:39,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:39,963 INFO L124 PetriNetUnfolderBase]: 1250/2158 cut-off events. [2024-11-23 18:39:39,963 INFO L125 PetriNetUnfolderBase]: For 7850/7850 co-relation queries the response was YES. [2024-11-23 18:39:39,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10261 conditions, 2158 events. 1250/2158 cut-off events. For 7850/7850 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10840 event pairs, 198 based on Foata normal form. 72/2230 useless extension candidates. Maximal degree in co-relation 10160. Up to 778 conditions per place. [2024-11-23 18:39:39,980 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 200 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-11-23 18:39:39,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 256 transitions, 3013 flow [2024-11-23 18:39:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:39:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:39:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-11-23 18:39:39,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6293436293436293 [2024-11-23 18:39:39,982 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1655 flow. Second operand 7 states and 163 transitions. [2024-11-23 18:39:39,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 256 transitions, 3013 flow [2024-11-23 18:39:40,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 256 transitions, 2829 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-11-23 18:39:40,004 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1779 flow [2024-11-23 18:39:40,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1779, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-11-23 18:39:40,005 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2024-11-23 18:39:40,005 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1779 flow [2024-11-23 18:39:40,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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) [2024-11-23 18:39:40,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:40,006 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:40,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:40,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:40,207 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:40,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1719597820, now seen corresponding path program 3 times [2024-11-23 18:39:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:40,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751577015] [2024-11-23 18:39:40,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:39:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:40,210 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 18:39:40,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:39:40,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:40,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 18:39:40,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:40,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-23 18:39:40,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:39:40,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-23 18:39:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 18:39:40,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:39:40,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2024-11-23 18:39:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:39:40,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:39:42,050 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 33 treesize of output 29 [2024-11-23 18:39:42,111 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-23 18:39:42,111 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 86 treesize of output 69 [2024-11-23 18:39:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:39:42,463 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751577015] [2024-11-23 18:39:42,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751577015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:39:42,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:39:42,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-23 18:39:42,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514082577] [2024-11-23 18:39:42,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:39:42,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:39:42,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:42,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:39:42,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:39:43,787 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-23 18:39:43,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1779 flow. Second operand has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 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) [2024-11-23 18:39:43,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:43,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-23 18:39:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:46,175 INFO L124 PetriNetUnfolderBase]: 1761/3032 cut-off events. [2024-11-23 18:39:46,175 INFO L125 PetriNetUnfolderBase]: For 15681/15681 co-relation queries the response was YES. [2024-11-23 18:39:46,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15329 conditions, 3032 events. 1761/3032 cut-off events. For 15681/15681 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15620 event pairs, 225 based on Foata normal form. 5/3037 useless extension candidates. Maximal degree in co-relation 15235. Up to 1227 conditions per place. [2024-11-23 18:39:46,193 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 157 selfloop transitions, 82 changer transitions 73/313 dead transitions. [2024-11-23 18:39:46,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 313 transitions, 3583 flow [2024-11-23 18:39:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 18:39:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 18:39:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 284 transitions. [2024-11-23 18:39:46,195 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5117117117117117 [2024-11-23 18:39:46,195 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1779 flow. Second operand 15 states and 284 transitions. [2024-11-23 18:39:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 313 transitions, 3583 flow [2024-11-23 18:39:46,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 313 transitions, 3353 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-11-23 18:39:46,268 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 2066 flow [2024-11-23 18:39:46,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2066, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-11-23 18:39:46,269 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2024-11-23 18:39:46,269 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 2066 flow [2024-11-23 18:39:46,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 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) [2024-11-23 18:39:46,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:46,270 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:46,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:46,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:46,471 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:46,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1453946866, now seen corresponding path program 4 times [2024-11-23 18:39:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:46,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979351839] [2024-11-23 18:39:46,471 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:39:46,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:46,473 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:46,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 18:39:46,567 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:39:46,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:46,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 18:39:46,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:46,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:39:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 18:39:46,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:39:46,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2024-11-23 18:39:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:39:46,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:39:48,257 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 33 treesize of output 29 [2024-11-23 18:39:48,285 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-23 18:39:48,285 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 86 treesize of output 69 [2024-11-23 18:39:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:39:48,467 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:39:48,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979351839] [2024-11-23 18:39:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979351839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:39:48,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:39:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-23 18:39:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621948033] [2024-11-23 18:39:48,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:39:48,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:39:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:39:48,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:39:48,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:39:49,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-23 18:39:49,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 2066 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-23 18:39:49,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:39:49,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-23 18:39:49,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:39:53,510 INFO L124 PetriNetUnfolderBase]: 1556/2738 cut-off events. [2024-11-23 18:39:53,510 INFO L125 PetriNetUnfolderBase]: For 16899/16899 co-relation queries the response was YES. [2024-11-23 18:39:53,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14826 conditions, 2738 events. 1556/2738 cut-off events. For 16899/16899 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13681 event pairs, 325 based on Foata normal form. 3/2741 useless extension candidates. Maximal degree in co-relation 14731. Up to 1785 conditions per place. [2024-11-23 18:39:53,528 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 139 selfloop transitions, 77 changer transitions 42/260 dead transitions. [2024-11-23 18:39:53,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 260 transitions, 3269 flow [2024-11-23 18:39:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:39:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:39:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-11-23 18:39:53,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6054054054054054 [2024-11-23 18:39:53,531 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 2066 flow. Second operand 10 states and 224 transitions. [2024-11-23 18:39:53,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 260 transitions, 3269 flow [2024-11-23 18:39:53,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 260 transitions, 3214 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-11-23 18:39:53,572 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2314 flow [2024-11-23 18:39:53,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-11-23 18:39:53,573 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2024-11-23 18:39:53,573 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2314 flow [2024-11-23 18:39:53,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-23 18:39:53,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:39:53,573 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:39:53,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-23 18:39:53,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:53,774 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-23 18:39:53,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:39:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash -838231482, now seen corresponding path program 5 times [2024-11-23 18:39:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:39:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126289579] [2024-11-23 18:39:53,775 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:39:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:39:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:39:53,778 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:39:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cfa5dbe-bdb2-4f27-bd82-62797a513ade/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 18:39:53,882 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:39:53,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:39:53,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-23 18:39:53,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:39:54,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:39:55,030 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-23 18:39:55,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2024-11-23 18:39:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:39:55,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:40:02,723 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 306 treesize of output 270 [2024-11-23 18:40:04,727 INFO L349 Elim1Store]: treesize reduction 5, result has 98.3 percent of original size [2024-11-23 18:40:04,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 2351 treesize of output 2034