./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:15:02,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:15:02,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:15:02,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:15:02,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:15:02,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:15:02,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:15:02,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:15:02,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:15:02,633 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:15:02,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:15:02,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:15:02,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:15:02,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:15:02,634 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:15:02,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:15:02,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:15:02,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:15:02,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:15:02,636 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:15:02,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:15:02,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:15:02,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:15:02,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:15:02,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:15:02,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:15:02,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:15:02,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:15:02,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:15:02,638 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_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-28 05:15:02,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:15:02,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:15:02,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:15:02,999 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:15:02,999 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:15:03,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-28 05:15:06,308 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/data/3b2ee6703/bd6b678255e348e180f45a9cc9f20fc3/FLAGb4dccbf57 [2024-11-28 05:15:06,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:15:06,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-28 05:15:06,640 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/data/3b2ee6703/bd6b678255e348e180f45a9cc9f20fc3/FLAGb4dccbf57 [2024-11-28 05:15:06,660 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/data/3b2ee6703/bd6b678255e348e180f45a9cc9f20fc3 [2024-11-28 05:15:06,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:15:06,666 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:15:06,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:15:06,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:15:06,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:15:06,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:15:06" (1/1) ... [2024-11-28 05:15:06,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97c373c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:06, skipping insertion in model container [2024-11-28 05:15:06,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:15:06" (1/1) ... [2024-11-28 05:15:06,699 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:15:06,949 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:15:06,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:15:06,973 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:15:07,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:15:07,037 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:15:07,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07 WrapperNode [2024-11-28 05:15:07,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:15:07,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:15:07,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:15:07,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:15:07,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,110 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 180 [2024-11-28 05:15:07,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:15:07,113 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:15:07,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:15:07,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:15:07,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,129 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,154 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 05:15:07,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,172 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:15:07,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:15:07,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:15:07,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:15:07,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (1/1) ... [2024-11-28 05:15:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:15:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:07,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:15:07,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:15:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:15:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:15:07,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:15:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:15:07,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 05:15:07,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:15:07,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:15:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:15:07,262 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:15:07,374 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:15:07,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:15:07,816 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:15:07,817 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:15:08,203 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:15:08,203 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:15:08,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:15:08 BoogieIcfgContainer [2024-11-28 05:15:08,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:15:08,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:15:08,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:15:08,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:15:08,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:15:06" (1/3) ... [2024-11-28 05:15:08,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478e0219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:15:08, skipping insertion in model container [2024-11-28 05:15:08,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:15:07" (2/3) ... [2024-11-28 05:15:08,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478e0219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:15:08, skipping insertion in model container [2024-11-28 05:15:08,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:15:08" (3/3) ... [2024-11-28 05:15:08,214 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-28 05:15:08,231 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:15:08,233 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 41 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2024-11-28 05:15:08,233 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:15:08,295 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 05:15:08,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-11-28 05:15:08,384 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-11-28 05:15:08,389 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:15:08,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-11-28 05:15:08,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-11-28 05:15:08,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-11-28 05:15:08,415 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:15:08,437 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;@2b7b615a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:15:08,439 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-28 05:15:08,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:15:08,445 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:15:08,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:15:08,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:08,446 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:15:08,447 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:08,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash 609152, now seen corresponding path program 1 times [2024-11-28 05:15:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:08,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343073854] [2024-11-28 05:15:08,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:08,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343073854] [2024-11-28 05:15:08,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343073854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:08,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:08,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:15:08,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147143439] [2024-11-28 05:15:08,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:08,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:15:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:08,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:15:08,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:15:08,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:08,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:08,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:08,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:09,389 INFO L124 PetriNetUnfolderBase]: 1316/1924 cut-off events. [2024-11-28 05:15:09,389 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-28 05:15:09,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 1924 events. 1316/1924 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9789 event pairs, 1060 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 3631. Up to 1877 conditions per place. [2024-11-28 05:15:09,412 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-28 05:15:09,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-28 05:15:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:15:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:15:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-28 05:15:09,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-11-28 05:15:09,430 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-11-28 05:15:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-28 05:15:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:15:09,451 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-28 05:15:09,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-28 05:15:09,459 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-11-28 05:15:09,460 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-28 05:15:09,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:09,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:09,460 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:15:09,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:15:09,461 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:09,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 609153, now seen corresponding path program 1 times [2024-11-28 05:15:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467728651] [2024-11-28 05:15:09,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:09,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467728651] [2024-11-28 05:15:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467728651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:09,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:09,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:15:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32860879] [2024-11-28 05:15:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:09,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:15:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:09,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:15:09,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:15:09,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:09,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:09,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:09,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:09,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:10,333 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-11-28 05:15:10,333 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 05:15:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9837 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3837. Up to 1882 conditions per place. [2024-11-28 05:15:10,370 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-28 05:15:10,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-28 05:15:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:15:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:15:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-28 05:15:10,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-28 05:15:10,374 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-28 05:15:10,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-28 05:15:10,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:10,376 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-28 05:15:10,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-28 05:15:10,380 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-28 05:15:10,380 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-28 05:15:10,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:10,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:10,381 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:15:10,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:15:10,382 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:10,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash 585415132, now seen corresponding path program 1 times [2024-11-28 05:15:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:10,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466522386] [2024-11-28 05:15:10,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466522386] [2024-11-28 05:15:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466522386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734001542] [2024-11-28 05:15:10,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:10,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:10,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:10,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:15:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:10,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:15:10,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:11,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 05:15:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:11,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734001542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:11,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 05:15:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239286472] [2024-11-28 05:15:11,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:11,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:15:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:11,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:15:11,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:15:11,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:11,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-28 05:15:11,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:11,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:11,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:12,218 INFO L124 PetriNetUnfolderBase]: 1318/1929 cut-off events. [2024-11-28 05:15:12,218 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 05:15:12,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3875 conditions, 1929 events. 1318/1929 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9847 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3844. Up to 1879 conditions per place. [2024-11-28 05:15:12,230 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-11-28 05:15:12,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2024-11-28 05:15:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:15:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:15:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-11-28 05:15:12,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-28 05:15:12,232 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2024-11-28 05:15:12,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2024-11-28 05:15:12,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:15:12,234 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2024-11-28 05:15:12,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-28 05:15:12,235 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2024-11-28 05:15:12,235 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2024-11-28 05:15:12,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-28 05:15:12,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:12,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:15:12,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:15:12,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:12,441 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:12,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 970344253, now seen corresponding path program 1 times [2024-11-28 05:15:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560759427] [2024-11-28 05:15:12,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:12,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560759427] [2024-11-28 05:15:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560759427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:12,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:12,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:15:12,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045720718] [2024-11-28 05:15:12,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:12,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:15:12,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:12,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:15:12,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:15:12,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:12,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:12,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:12,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:12,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:12,756 INFO L124 PetriNetUnfolderBase]: 794/1175 cut-off events. [2024-11-28 05:15:12,756 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 05:15:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1175 events. 794/1175 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5295 event pairs, 608 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 2337. Up to 1136 conditions per place. [2024-11-28 05:15:12,763 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-11-28 05:15:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2024-11-28 05:15:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:15:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:15:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-28 05:15:12,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-28 05:15:12,766 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2024-11-28 05:15:12,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2024-11-28 05:15:12,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-28 05:15:12,767 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2024-11-28 05:15:12,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-28 05:15:12,771 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-11-28 05:15:12,771 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2024-11-28 05:15:12,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:12,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:12,772 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:15:12,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:15:12,772 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:12,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash 970344254, now seen corresponding path program 1 times [2024-11-28 05:15:12,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:12,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349448082] [2024-11-28 05:15:12,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:12,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:12,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349448082] [2024-11-28 05:15:12,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349448082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:12,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:12,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:15:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21212212] [2024-11-28 05:15:12,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:12,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:15:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:12,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:15:12,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:15:12,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:12,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:12,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:12,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:12,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:13,292 INFO L124 PetriNetUnfolderBase]: 1375/2055 cut-off events. [2024-11-28 05:15:13,293 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-28 05:15:13,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 2055 events. 1375/2055 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9951 event pairs, 908 based on Foata normal form. 0/1699 useless extension candidates. Maximal degree in co-relation 2758. Up to 1350 conditions per place. [2024-11-28 05:15:13,305 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-28 05:15:13,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 320 flow [2024-11-28 05:15:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:15:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:15:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-28 05:15:13,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-28 05:15:13,307 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 5 states and 116 transitions. [2024-11-28 05:15:13,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 320 flow [2024-11-28 05:15:13,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:13,309 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 112 flow [2024-11-28 05:15:13,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-28 05:15:13,310 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-11-28 05:15:13,310 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 112 flow [2024-11-28 05:15:13,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:13,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:13,310 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:13,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:15:13,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:13,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 491784939, now seen corresponding path program 1 times [2024-11-28 05:15:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983965461] [2024-11-28 05:15:13,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983965461] [2024-11-28 05:15:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983965461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:13,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:15:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142951871] [2024-11-28 05:15:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:13,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:15:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:13,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:15:13,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:15:13,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:13,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:13,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:13,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:13,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:13,755 INFO L124 PetriNetUnfolderBase]: 1172/1762 cut-off events. [2024-11-28 05:15:13,755 INFO L125 PetriNetUnfolderBase]: For 379/451 co-relation queries the response was YES. [2024-11-28 05:15:13,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 1762 events. 1172/1762 cut-off events. For 379/451 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8143 event pairs, 848 based on Foata normal form. 0/1460 useless extension candidates. Maximal degree in co-relation 2937. Up to 1361 conditions per place. [2024-11-28 05:15:13,766 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-28 05:15:13,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 316 flow [2024-11-28 05:15:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:15:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:15:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-28 05:15:13,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-28 05:15:13,768 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 112 flow. Second operand 5 states and 109 transitions. [2024-11-28 05:15:13,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 316 flow [2024-11-28 05:15:13,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:13,772 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 132 flow [2024-11-28 05:15:13,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-28 05:15:13,774 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-28 05:15:13,774 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 132 flow [2024-11-28 05:15:13,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:13,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:13,774 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:13,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:15:13,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:13,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1757055229, now seen corresponding path program 1 times [2024-11-28 05:15:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432805676] [2024-11-28 05:15:13,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:14,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432805676] [2024-11-28 05:15:14,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432805676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057459169] [2024-11-28 05:15:14,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:14,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:14,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:14,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:15:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:14,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:15:14,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:14,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:14,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 05:15:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057459169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:14,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-28 05:15:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914733053] [2024-11-28 05:15:14,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:14,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:15:14,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:14,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:15:14,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:15:14,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 05:15:14,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:14,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:14,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 05:15:14,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:14,812 INFO L124 PetriNetUnfolderBase]: 1373/2063 cut-off events. [2024-11-28 05:15:14,813 INFO L125 PetriNetUnfolderBase]: For 763/920 co-relation queries the response was YES. [2024-11-28 05:15:14,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 2063 events. 1373/2063 cut-off events. For 763/920 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9935 event pairs, 583 based on Foata normal form. 0/1798 useless extension candidates. Maximal degree in co-relation 3766. Up to 988 conditions per place. [2024-11-28 05:15:14,827 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 77 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-28 05:15:14,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 422 flow [2024-11-28 05:15:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:15:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:15:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-11-28 05:15:14,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032467532467533 [2024-11-28 05:15:14,830 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 132 flow. Second operand 7 states and 155 transitions. [2024-11-28 05:15:14,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 422 flow [2024-11-28 05:15:14,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:14,833 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 171 flow [2024-11-28 05:15:14,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-11-28 05:15:14,834 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-28 05:15:14,835 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 171 flow [2024-11-28 05:15:14,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:14,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:14,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:14,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:15:15,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:15:15,039 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:15,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -609067664, now seen corresponding path program 1 times [2024-11-28 05:15:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:15,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625919872] [2024-11-28 05:15:15,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:15,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625919872] [2024-11-28 05:15:15,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625919872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631399404] [2024-11-28 05:15:15,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:15,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:15:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:15,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:15:15,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:15,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:15,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 05:15:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:15,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631399404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:15,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:15,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-28 05:15:15,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493004238] [2024-11-28 05:15:15,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:15,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:15:15,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:15,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:15:15,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:15:15,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 05:15:15,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:15,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:15,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 05:15:15,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:16,375 INFO L124 PetriNetUnfolderBase]: 1912/2847 cut-off events. [2024-11-28 05:15:16,375 INFO L125 PetriNetUnfolderBase]: For 2626/2861 co-relation queries the response was YES. [2024-11-28 05:15:16,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 2847 events. 1912/2847 cut-off events. For 2626/2861 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14000 event pairs, 874 based on Foata normal form. 0/2614 useless extension candidates. Maximal degree in co-relation 6519. Up to 1390 conditions per place. [2024-11-28 05:15:16,396 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 84 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-11-28 05:15:16,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 535 flow [2024-11-28 05:15:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:15:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:15:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-11-28 05:15:16,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-11-28 05:15:16,398 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 171 flow. Second operand 7 states and 153 transitions. [2024-11-28 05:15:16,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 535 flow [2024-11-28 05:15:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 518 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-28 05:15:16,405 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 202 flow [2024-11-28 05:15:16,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-28 05:15:16,406 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2024-11-28 05:15:16,406 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 202 flow [2024-11-28 05:15:16,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:16,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:16,406 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:16,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:15:16,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:16,612 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:16,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash 152094039, now seen corresponding path program 1 times [2024-11-28 05:15:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226693165] [2024-11-28 05:15:16,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226693165] [2024-11-28 05:15:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226693165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:16,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:15:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696074991] [2024-11-28 05:15:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:16,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:15:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:16,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:15:16,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:15:16,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:16,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2024-11-28 05:15:16,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:16,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:16,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:17,244 INFO L124 PetriNetUnfolderBase]: 2101/3015 cut-off events. [2024-11-28 05:15:17,244 INFO L125 PetriNetUnfolderBase]: For 4923/5264 co-relation queries the response was YES. [2024-11-28 05:15:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9266 conditions, 3015 events. 2101/3015 cut-off events. For 4923/5264 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13795 event pairs, 1546 based on Foata normal form. 0/2798 useless extension candidates. Maximal degree in co-relation 8592. Up to 2733 conditions per place. [2024-11-28 05:15:17,276 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 60 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2024-11-28 05:15:17,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 392 flow [2024-11-28 05:15:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:15:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:15:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-28 05:15:17,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-28 05:15:17,279 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 202 flow. Second operand 5 states and 102 transitions. [2024-11-28 05:15:17,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 392 flow [2024-11-28 05:15:17,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 377 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 05:15:17,287 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 214 flow [2024-11-28 05:15:17,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-11-28 05:15:17,289 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-28 05:15:17,289 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 214 flow [2024-11-28 05:15:17,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2024-11-28 05:15:17,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:17,289 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:17,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:15:17,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:17,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1665272304, now seen corresponding path program 1 times [2024-11-28 05:15:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:17,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129373700] [2024-11-28 05:15:17,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129373700] [2024-11-28 05:15:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129373700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179083295] [2024-11-28 05:15:17,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:17,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:17,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:17,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:15:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:17,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:15:17,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:17,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179083295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:17,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:15:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66214947] [2024-11-28 05:15:17,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:17,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:15:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:17,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:15:17,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:15:17,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:17,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 214 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:17,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:17,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:17,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:18,873 INFO L124 PetriNetUnfolderBase]: 3628/5261 cut-off events. [2024-11-28 05:15:18,874 INFO L125 PetriNetUnfolderBase]: For 6633/7056 co-relation queries the response was YES. [2024-11-28 05:15:18,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 5261 events. 3628/5261 cut-off events. For 6633/7056 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27053 event pairs, 2002 based on Foata normal form. 86/5117 useless extension candidates. Maximal degree in co-relation 15640. Up to 2940 conditions per place. [2024-11-28 05:15:18,916 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-28 05:15:18,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 728 flow [2024-11-28 05:15:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:15:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:15:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-28 05:15:18,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-28 05:15:18,920 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 214 flow. Second operand 8 states and 165 transitions. [2024-11-28 05:15:18,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 728 flow [2024-11-28 05:15:18,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 723 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:18,936 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 285 flow [2024-11-28 05:15:18,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-28 05:15:18,937 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-11-28 05:15:18,937 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 285 flow [2024-11-28 05:15:18,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:18,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:18,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:18,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:15:19,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 05:15:19,142 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:19,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1205302628, now seen corresponding path program 1 times [2024-11-28 05:15:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781036881] [2024-11-28 05:15:19,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781036881] [2024-11-28 05:15:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781036881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318997438] [2024-11-28 05:15:19,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:19,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:19,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:15:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:19,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:15:19,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:19,821 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:15:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318997438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:19,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:15:19,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-28 05:15:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877642603] [2024-11-28 05:15:19,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:19,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:19,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:19,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:15:19,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:19,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 285 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-11-28 05:15:19,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:19,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:19,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:20,738 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-11-28 05:15:20,738 INFO L125 PetriNetUnfolderBase]: For 10505/10968 co-relation queries the response was YES. [2024-11-28 05:15:20,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 4337 events. 2977/4337 cut-off events. For 10505/10968 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21394 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8069. Up to 1920 conditions per place. [2024-11-28 05:15:20,779 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-28 05:15:20,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 805 flow [2024-11-28 05:15:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:15:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:15:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-28 05:15:20,780 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-28 05:15:20,780 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 285 flow. Second operand 6 states and 110 transitions. [2024-11-28 05:15:20,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 805 flow [2024-11-28 05:15:20,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 781 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-28 05:15:20,793 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 287 flow [2024-11-28 05:15:20,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-11-28 05:15:20,794 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-11-28 05:15:20,794 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 287 flow [2024-11-28 05:15:20,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-11-28 05:15:20,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:20,795 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:20,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:15:20,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:15:20,999 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:21,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1502672810, now seen corresponding path program 1 times [2024-11-28 05:15:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:21,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075969157] [2024-11-28 05:15:21,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:21,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:21,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075969157] [2024-11-28 05:15:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075969157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639605560] [2024-11-28 05:15:21,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:21,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:21,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:21,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:15:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:21,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:15:21,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:21,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:21,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639605560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:21,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:21,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-28 05:15:21,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818399049] [2024-11-28 05:15:21,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:21,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:15:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:21,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:15:21,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:15:21,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:21,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 287 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:21,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:21,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:21,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:22,281 INFO L124 PetriNetUnfolderBase]: 2677/3873 cut-off events. [2024-11-28 05:15:22,281 INFO L125 PetriNetUnfolderBase]: For 8754/9210 co-relation queries the response was YES. [2024-11-28 05:15:22,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 3873 events. 2677/3873 cut-off events. For 8754/9210 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18127 event pairs, 1559 based on Foata normal form. 54/3924 useless extension candidates. Maximal degree in co-relation 8628. Up to 2459 conditions per place. [2024-11-28 05:15:22,306 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-11-28 05:15:22,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 747 flow [2024-11-28 05:15:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:15:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:15:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-28 05:15:22,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-28 05:15:22,308 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 287 flow. Second operand 8 states and 156 transitions. [2024-11-28 05:15:22,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 747 flow [2024-11-28 05:15:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 705 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 05:15:22,321 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 343 flow [2024-11-28 05:15:22,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=343, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-11-28 05:15:22,322 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2024-11-28 05:15:22,322 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 343 flow [2024-11-28 05:15:22,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:22,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:22,323 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:22,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:15:22,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:15:22,524 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:22,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash -794896021, now seen corresponding path program 2 times [2024-11-28 05:15:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:22,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439481703] [2024-11-28 05:15:22,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:22,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:22,543 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:22,544 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:15:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:22,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439481703] [2024-11-28 05:15:22,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439481703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:22,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514951751] [2024-11-28 05:15:22,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:22,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:22,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:15:22,878 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:22,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:22,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:15:22,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:23,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:23,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 05:15:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514951751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:23,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 05:15:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753110255] [2024-11-28 05:15:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:23,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:15:23,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:23,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:15:23,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:15:23,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 343 flow. Second operand has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:23,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:23,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:23,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:25,194 INFO L124 PetriNetUnfolderBase]: 3091/4409 cut-off events. [2024-11-28 05:15:25,194 INFO L125 PetriNetUnfolderBase]: For 11268/11891 co-relation queries the response was YES. [2024-11-28 05:15:25,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16159 conditions, 4409 events. 3091/4409 cut-off events. For 11268/11891 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20863 event pairs, 499 based on Foata normal form. 144/4549 useless extension candidates. Maximal degree in co-relation 10659. Up to 756 conditions per place. [2024-11-28 05:15:25,217 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 169 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-11-28 05:15:25,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 193 transitions, 1345 flow [2024-11-28 05:15:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:15:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:15:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 289 transitions. [2024-11-28 05:15:25,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46915584415584416 [2024-11-28 05:15:25,219 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 343 flow. Second operand 14 states and 289 transitions. [2024-11-28 05:15:25,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 193 transitions, 1345 flow [2024-11-28 05:15:25,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1317 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-28 05:15:25,243 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 403 flow [2024-11-28 05:15:25,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=403, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2024-11-28 05:15:25,243 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-11-28 05:15:25,244 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 403 flow [2024-11-28 05:15:25,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:25,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:25,244 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:25,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:15:25,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:15:25,445 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:25,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:25,445 INFO L85 PathProgramCache]: Analyzing trace with hash 415658053, now seen corresponding path program 2 times [2024-11-28 05:15:25,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:25,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720581282] [2024-11-28 05:15:25,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:25,461 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:25,461 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:15:25,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:25,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720581282] [2024-11-28 05:15:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720581282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:25,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745803448] [2024-11-28 05:15:25,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:25,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:25,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:25,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:15:25,792 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:25,792 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:25,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:15:25,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:25,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:26,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 05:15:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745803448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:26,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 05:15:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806908816] [2024-11-28 05:15:26,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:26,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:15:26,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:26,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:15:26,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:15:26,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:26,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 403 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:26,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:26,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:26,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:28,013 INFO L124 PetriNetUnfolderBase]: 3521/4979 cut-off events. [2024-11-28 05:15:28,013 INFO L125 PetriNetUnfolderBase]: For 16380/17123 co-relation queries the response was YES. [2024-11-28 05:15:28,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 4979 events. 3521/4979 cut-off events. For 16380/17123 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 22652 event pairs, 544 based on Foata normal form. 168/5143 useless extension candidates. Maximal degree in co-relation 13684. Up to 912 conditions per place. [2024-11-28 05:15:28,036 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 167 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-11-28 05:15:28,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 193 transitions, 1515 flow [2024-11-28 05:15:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:15:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:15:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-11-28 05:15:28,038 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-11-28 05:15:28,038 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 403 flow. Second operand 14 states and 277 transitions. [2024-11-28 05:15:28,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 193 transitions, 1515 flow [2024-11-28 05:15:28,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 193 transitions, 1327 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-11-28 05:15:28,058 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 418 flow [2024-11-28 05:15:28,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=418, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2024-11-28 05:15:28,059 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2024-11-28 05:15:28,059 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 418 flow [2024-11-28 05:15:28,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:28,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:28,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:28,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:15:28,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:15:28,263 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:28,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -480796997, now seen corresponding path program 1 times [2024-11-28 05:15:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:28,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382956536] [2024-11-28 05:15:28,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:28,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:28,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382956536] [2024-11-28 05:15:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382956536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:28,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:15:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697701342] [2024-11-28 05:15:28,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:28,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:15:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:28,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:15:28,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:15:28,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 05:15:28,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:28,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:28,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 05:15:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:28,794 INFO L124 PetriNetUnfolderBase]: 3013/4554 cut-off events. [2024-11-28 05:15:28,794 INFO L125 PetriNetUnfolderBase]: For 15577/16254 co-relation queries the response was YES. [2024-11-28 05:15:28,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 4554 events. 3013/4554 cut-off events. For 15577/16254 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22024 event pairs, 715 based on Foata normal form. 3/4538 useless extension candidates. Maximal degree in co-relation 11955. Up to 3581 conditions per place. [2024-11-28 05:15:28,832 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 65 selfloop transitions, 4 changer transitions 8/85 dead transitions. [2024-11-28 05:15:28,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 695 flow [2024-11-28 05:15:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:15:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:15:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-28 05:15:28,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-28 05:15:28,834 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 418 flow. Second operand 3 states and 74 transitions. [2024-11-28 05:15:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 695 flow [2024-11-28 05:15:28,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 618 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-28 05:15:28,859 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 334 flow [2024-11-28 05:15:28,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-11-28 05:15:28,860 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-28 05:15:28,860 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 334 flow [2024-11-28 05:15:28,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:28,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:28,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:28,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 05:15:28,860 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:28,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 316762409, now seen corresponding path program 1 times [2024-11-28 05:15:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312810263] [2024-11-28 05:15:28,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312810263] [2024-11-28 05:15:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312810263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814737973] [2024-11-28 05:15:28,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:28,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:28,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:15:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:29,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:15:29,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:29,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814737973] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:29,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:15:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 05:15:29,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461283438] [2024-11-28 05:15:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:29,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:15:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:29,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:15:29,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:15:29,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 05:15:29,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:29,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:29,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 05:15:29,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:29,678 INFO L124 PetriNetUnfolderBase]: 3449/4975 cut-off events. [2024-11-28 05:15:29,678 INFO L125 PetriNetUnfolderBase]: For 12510/13086 co-relation queries the response was YES. [2024-11-28 05:15:29,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18357 conditions, 4975 events. 3449/4975 cut-off events. For 12510/13086 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 24059 event pairs, 906 based on Foata normal form. 166/5034 useless extension candidates. Maximal degree in co-relation 13798. Up to 2830 conditions per place. [2024-11-28 05:15:29,702 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-11-28 05:15:29,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 613 flow [2024-11-28 05:15:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:15:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:15:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-28 05:15:29,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 05:15:29,704 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 334 flow. Second operand 5 states and 88 transitions. [2024-11-28 05:15:29,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 613 flow [2024-11-28 05:15:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 555 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-11-28 05:15:29,736 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 316 flow [2024-11-28 05:15:29,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-11-28 05:15:29,736 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2024-11-28 05:15:29,737 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 316 flow [2024-11-28 05:15:29,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:29,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:29,737 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:29,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:15:29,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:15:29,938 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:29,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:29,938 INFO L85 PathProgramCache]: Analyzing trace with hash -387099273, now seen corresponding path program 1 times [2024-11-28 05:15:29,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:29,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368809531] [2024-11-28 05:15:29,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:29,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:15:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368809531] [2024-11-28 05:15:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368809531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806326037] [2024-11-28 05:15:30,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:15:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:30,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:30,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:15:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:30,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:15:30,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:30,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:30,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806326037] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:30,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:15:30,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-28 05:15:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775880569] [2024-11-28 05:15:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:30,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:30,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:30,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:30,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:15:30,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 05:15:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 316 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:30,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 05:15:30,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:31,186 INFO L124 PetriNetUnfolderBase]: 4417/6333 cut-off events. [2024-11-28 05:15:31,186 INFO L125 PetriNetUnfolderBase]: For 15960/16078 co-relation queries the response was YES. [2024-11-28 05:15:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21887 conditions, 6333 events. 4417/6333 cut-off events. For 15960/16078 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31528 event pairs, 1172 based on Foata normal form. 0/5905 useless extension candidates. Maximal degree in co-relation 16379. Up to 2406 conditions per place. [2024-11-28 05:15:31,215 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 144 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-11-28 05:15:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 170 transitions, 1316 flow [2024-11-28 05:15:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:15:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:15:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-11-28 05:15:31,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-28 05:15:31,218 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 316 flow. Second operand 9 states and 165 transitions. [2024-11-28 05:15:31,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 170 transitions, 1316 flow [2024-11-28 05:15:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 170 transitions, 1269 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:15:31,239 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 408 flow [2024-11-28 05:15:31,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-11-28 05:15:31,240 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2024-11-28 05:15:31,240 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 408 flow [2024-11-28 05:15:31,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:31,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:31,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:31,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:15:31,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:31,442 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:31,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -482899191, now seen corresponding path program 2 times [2024-11-28 05:15:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:31,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894497191] [2024-11-28 05:15:31,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:31,454 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:15:31,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:15:31,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894497191] [2024-11-28 05:15:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894497191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:31,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:31,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:15:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712677227] [2024-11-28 05:15:31,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:31,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:31,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:31,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:31,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:15:31,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 05:15:31,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:31,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:31,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 05:15:31,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:33,068 INFO L124 PetriNetUnfolderBase]: 8880/12569 cut-off events. [2024-11-28 05:15:33,068 INFO L125 PetriNetUnfolderBase]: For 29059/29059 co-relation queries the response was YES. [2024-11-28 05:15:33,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46419 conditions, 12569 events. 8880/12569 cut-off events. For 29059/29059 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 63702 event pairs, 479 based on Foata normal form. 28/12384 useless extension candidates. Maximal degree in co-relation 36092. Up to 2968 conditions per place. [2024-11-28 05:15:33,128 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 308 selfloop transitions, 118 changer transitions 0/427 dead transitions. [2024-11-28 05:15:33,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 427 transitions, 3350 flow [2024-11-28 05:15:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:15:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:15:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 305 transitions. [2024-11-28 05:15:33,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4077540106951872 [2024-11-28 05:15:33,131 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 408 flow. Second operand 17 states and 305 transitions. [2024-11-28 05:15:33,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 427 transitions, 3350 flow [2024-11-28 05:15:33,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 427 transitions, 3347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:33,199 INFO L231 Difference]: Finished difference. Result has 105 places, 177 transitions, 1591 flow [2024-11-28 05:15:33,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1591, PETRI_PLACES=105, PETRI_TRANSITIONS=177} [2024-11-28 05:15:33,200 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-28 05:15:33,200 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 177 transitions, 1591 flow [2024-11-28 05:15:33,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:33,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:33,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:33,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:15:33,201 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:33,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 283446195, now seen corresponding path program 3 times [2024-11-28 05:15:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989132257] [2024-11-28 05:15:33,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:15:33,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:33,215 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:15:33,215 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:15:33,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989132257] [2024-11-28 05:15:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989132257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:33,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:33,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:15:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208291582] [2024-11-28 05:15:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:33,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:33,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:33,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:15:33,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 05:15:33,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 177 transitions, 1591 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:33,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:33,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 05:15:33,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:35,286 INFO L124 PetriNetUnfolderBase]: 11076/15629 cut-off events. [2024-11-28 05:15:35,286 INFO L125 PetriNetUnfolderBase]: For 72880/72880 co-relation queries the response was YES. [2024-11-28 05:15:35,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71348 conditions, 15629 events. 11076/15629 cut-off events. For 72880/72880 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 81291 event pairs, 4198 based on Foata normal form. 4/15633 useless extension candidates. Maximal degree in co-relation 62126. Up to 9120 conditions per place. [2024-11-28 05:15:35,409 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 279 selfloop transitions, 89 changer transitions 3/372 dead transitions. [2024-11-28 05:15:35,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 372 transitions, 4035 flow [2024-11-28 05:15:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:15:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:15:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-28 05:15:35,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-11-28 05:15:35,411 INFO L175 Difference]: Start difference. First operand has 105 places, 177 transitions, 1591 flow. Second operand 7 states and 135 transitions. [2024-11-28 05:15:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 372 transitions, 4035 flow [2024-11-28 05:15:36,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 372 transitions, 3945 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-28 05:15:36,048 INFO L231 Difference]: Finished difference. Result has 115 places, 226 transitions, 2411 flow [2024-11-28 05:15:36,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2411, PETRI_PLACES=115, PETRI_TRANSITIONS=226} [2024-11-28 05:15:36,049 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-11-28 05:15:36,049 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 226 transitions, 2411 flow [2024-11-28 05:15:36,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:36,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:36,049 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:36,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 05:15:36,049 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:36,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -496933285, now seen corresponding path program 4 times [2024-11-28 05:15:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847228956] [2024-11-28 05:15:36,050 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:15:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:36,061 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:15:36,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:15:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:36,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847228956] [2024-11-28 05:15:36,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847228956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:15:36,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:15:36,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:15:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497848807] [2024-11-28 05:15:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:36,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:36,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:36,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:15:36,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 05:15:36,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 226 transitions, 2411 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:36,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:36,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 05:15:36,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:40,942 INFO L124 PetriNetUnfolderBase]: 21414/29774 cut-off events. [2024-11-28 05:15:40,942 INFO L125 PetriNetUnfolderBase]: For 184770/184770 co-relation queries the response was YES. [2024-11-28 05:15:41,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144617 conditions, 29774 events. 21414/29774 cut-off events. For 184770/184770 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 164795 event pairs, 1483 based on Foata normal form. 44/29818 useless extension candidates. Maximal degree in co-relation 129496. Up to 7461 conditions per place. [2024-11-28 05:15:41,161 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 497 selfloop transitions, 355 changer transitions 0/853 dead transitions. [2024-11-28 05:15:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 853 transitions, 10292 flow [2024-11-28 05:15:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:15:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:15:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 324 transitions. [2024-11-28 05:15:41,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-28 05:15:41,163 INFO L175 Difference]: Start difference. First operand has 115 places, 226 transitions, 2411 flow. Second operand 18 states and 324 transitions. [2024-11-28 05:15:41,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 853 transitions, 10292 flow [2024-11-28 05:15:43,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 853 transitions, 9999 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-11-28 05:15:43,690 INFO L231 Difference]: Finished difference. Result has 145 places, 529 transitions, 7243 flow [2024-11-28 05:15:43,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7243, PETRI_PLACES=145, PETRI_TRANSITIONS=529} [2024-11-28 05:15:43,691 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-11-28 05:15:43,691 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 529 transitions, 7243 flow [2024-11-28 05:15:43,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:43,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:43,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:43,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 05:15:43,692 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:15:43,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1720850023, now seen corresponding path program 5 times [2024-11-28 05:15:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:43,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518364923] [2024-11-28 05:15:43,693 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:15:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:43,710 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:15:43,710 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:43,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518364923] [2024-11-28 05:15:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518364923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714729628] [2024-11-28 05:15:43,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:15:43,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:43,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:43,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:15:43,939 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:15:43,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:43,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:15:43,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:44,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:15:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714729628] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:44,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:15:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-28 05:15:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948545079] [2024-11-28 05:15:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:15:44,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:15:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:44,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:15:44,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:15:44,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 05:15:44,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 529 transitions, 7243 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:44,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:44,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 05:15:44,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:51,071 INFO L124 PetriNetUnfolderBase]: 23272/33259 cut-off events. [2024-11-28 05:15:51,072 INFO L125 PetriNetUnfolderBase]: For 326131/326916 co-relation queries the response was YES. [2024-11-28 05:15:51,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188645 conditions, 33259 events. 23272/33259 cut-off events. For 326131/326916 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 202823 event pairs, 3159 based on Foata normal form. 254/33291 useless extension candidates. Maximal degree in co-relation 180594. Up to 15636 conditions per place. [2024-11-28 05:15:51,395 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 538 selfloop transitions, 273 changer transitions 0/834 dead transitions. [2024-11-28 05:15:51,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 834 transitions, 12467 flow [2024-11-28 05:15:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:15:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:15:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-11-28 05:15:51,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-11-28 05:15:51,396 INFO L175 Difference]: Start difference. First operand has 145 places, 529 transitions, 7243 flow. Second operand 8 states and 150 transitions. [2024-11-28 05:15:51,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 834 transitions, 12467 flow [2024-11-28 05:16:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 834 transitions, 12065 flow, removed 201 selfloop flow, removed 0 redundant places. [2024-11-28 05:16:03,138 INFO L231 Difference]: Finished difference. Result has 157 places, 651 transitions, 9739 flow [2024-11-28 05:16:03,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9739, PETRI_PLACES=157, PETRI_TRANSITIONS=651} [2024-11-28 05:16:03,138 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2024-11-28 05:16:03,138 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 651 transitions, 9739 flow [2024-11-28 05:16:03,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:03,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:16:03,139 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:03,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:16:03,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:03,339 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:16:03,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash 527922367, now seen corresponding path program 6 times [2024-11-28 05:16:03,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:03,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467214819] [2024-11-28 05:16:03,340 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:16:03,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:03,349 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 05:16:03,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:16:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467214819] [2024-11-28 05:16:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467214819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:16:03,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:16:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:16:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381326212] [2024-11-28 05:16:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:16:03,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:16:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:03,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:16:03,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:16:03,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 05:16:03,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 651 transitions, 9739 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:03,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:16:03,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 05:16:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:16:15,135 INFO L124 PetriNetUnfolderBase]: 32010/44515 cut-off events. [2024-11-28 05:16:15,136 INFO L125 PetriNetUnfolderBase]: For 494478/494478 co-relation queries the response was YES. [2024-11-28 05:16:15,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268259 conditions, 44515 events. 32010/44515 cut-off events. For 494478/494478 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 260171 event pairs, 3226 based on Foata normal form. 44/44559 useless extension candidates. Maximal degree in co-relation 257112. Up to 13143 conditions per place. [2024-11-28 05:16:15,807 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 578 selfloop transitions, 636 changer transitions 1/1216 dead transitions. [2024-11-28 05:16:15,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1216 transitions, 19092 flow [2024-11-28 05:16:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:16:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:16:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 367 transitions. [2024-11-28 05:16:15,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3971861471861472 [2024-11-28 05:16:15,810 INFO L175 Difference]: Start difference. First operand has 157 places, 651 transitions, 9739 flow. Second operand 21 states and 367 transitions. [2024-11-28 05:16:15,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1216 transitions, 19092 flow [2024-11-28 05:16:32,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1216 transitions, 18887 flow, removed 101 selfloop flow, removed 2 redundant places. [2024-11-28 05:16:32,284 INFO L231 Difference]: Finished difference. Result has 187 places, 943 transitions, 16441 flow [2024-11-28 05:16:32,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16441, PETRI_PLACES=187, PETRI_TRANSITIONS=943} [2024-11-28 05:16:32,285 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2024-11-28 05:16:32,285 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 943 transitions, 16441 flow [2024-11-28 05:16:32,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:32,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:16:32,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:32,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 05:16:32,285 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 05:16:32,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 880782853, now seen corresponding path program 7 times [2024-11-28 05:16:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56449962] [2024-11-28 05:16:32,286 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:16:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:16:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:16:32,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56449962] [2024-11-28 05:16:32,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56449962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:32,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027914055] [2024-11-28 05:16:32,409 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:16:32,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:32,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:32,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aca8b84-a6c6-4729-8a37-9629f49cfc43/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:16:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:16:32,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:16:32,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:16:32,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:16:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:16:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027914055] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:16:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-28 05:16:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519726580] [2024-11-28 05:16:32,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:16:32,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:16:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:32,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:16:32,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:16:32,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 05:16:32,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 943 transitions, 16441 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:32,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:16:32,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 05:16:32,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand