./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:38:14,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:38:14,726 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:38:14,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:38:14,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:38:14,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:38:14,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:38:14,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:38:14,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:38:14,791 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:38:14,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:38:14,793 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:38:14,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:38:14,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:38:14,794 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:38:14,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:38:14,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:38:14,796 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:38:14,796 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:38:14,796 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:38:14,796 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:38:14,796 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:38:14,796 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:38:14,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:38:14,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:38:14,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:38:14,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:38:14,798 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_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-23 23:38:15,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:38:15,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:38:15,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:38:15,183 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:38:15,184 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:38:15,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-23 23:38:18,414 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/data/583220be4/4a4dd46c952f434180c85761601c7fc2/FLAG2457fbeba [2024-11-23 23:38:18,707 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:38:18,707 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-23 23:38:18,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/data/583220be4/4a4dd46c952f434180c85761601c7fc2/FLAG2457fbeba [2024-11-23 23:38:18,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/data/583220be4/4a4dd46c952f434180c85761601c7fc2 [2024-11-23 23:38:18,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:38:18,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:38:18,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:38:18,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:38:18,780 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:38:18,781 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:18" (1/1) ... [2024-11-23 23:38:18,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481b7b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:18, skipping insertion in model container [2024-11-23 23:38:18,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:18" (1/1) ... [2024-11-23 23:38:18,803 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:38:19,013 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:38:19,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:38:19,032 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:38:19,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:38:19,105 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:38:19,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19 WrapperNode [2024-11-23 23:38:19,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:38:19,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:38:19,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:38:19,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:38:19,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,185 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 138 [2024-11-23 23:38:19,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:38:19,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:38:19,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:38:19,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:38:19,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,233 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]. [2024-11-23 23:38:19,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,247 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:38:19,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:38:19,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:38:19,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:38:19,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (1/1) ... [2024-11-23 23:38:19,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:38:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:19,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:38:19,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:38:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:38:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:38:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:38:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:38:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:38:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:38:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:38:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:38:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:38:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:38:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:38:19,363 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:38:19,491 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:38:19,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:38:19,997 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:38:19,997 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:38:20,422 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:38:20,422 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 23:38:20,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:20 BoogieIcfgContainer [2024-11-23 23:38:20,423 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:38:20,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:38:20,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:38:20,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:38:20,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:38:18" (1/3) ... [2024-11-23 23:38:20,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2041d078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:20, skipping insertion in model container [2024-11-23 23:38:20,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:19" (2/3) ... [2024-11-23 23:38:20,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2041d078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:20, skipping insertion in model container [2024-11-23 23:38:20,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:20" (3/3) ... [2024-11-23 23:38:20,455 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-23 23:38:20,476 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:38:20,479 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-23 23:38:20,479 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:38:20,579 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 23:38:20,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-11-23 23:38:20,680 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-11-23 23:38:20,684 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 23:38:20,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-23 23:38:20,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-11-23 23:38:20,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-11-23 23:38:20,708 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:38:20,730 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;@633c031e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:38:20,730 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-23 23:38:20,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:38:20,743 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:38:20,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:38:20,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:20,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:38:20,745 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:20,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 456708, now seen corresponding path program 1 times [2024-11-23 23:38:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856782275] [2024-11-23 23:38:20,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856782275] [2024-11-23 23:38:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856782275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:38:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093820088] [2024-11-23 23:38:21,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:21,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:38:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:21,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:38:21,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:38:21,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-23 23:38:21,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 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) [2024-11-23 23:38:21,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:21,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-23 23:38:21,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:21,379 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-11-23 23:38:21,379 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-23 23:38:21,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2436 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-11-23 23:38:21,392 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-23 23:38:21,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-11-23 23:38:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:38:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:38:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-23 23:38:21,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-11-23 23:38:21,411 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-11-23 23:38:21,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-11-23 23:38:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:38:21,422 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-23 23:38:21,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-23 23:38:21,433 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-23 23:38:21,434 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-23 23:38:21,434 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) [2024-11-23 23:38:21,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:21,434 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:38:21,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:38:21,435 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:21,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash 456709, now seen corresponding path program 1 times [2024-11-23 23:38:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:21,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850797502] [2024-11-23 23:38:21,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:21,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850797502] [2024-11-23 23:38:21,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850797502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:21,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:21,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:38:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379030394] [2024-11-23 23:38:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:21,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:38:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:21,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:38:21,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:38:21,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-23 23:38:21,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 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) [2024-11-23 23:38:21,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:21,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-23 23:38:21,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:22,205 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-11-23 23:38:22,205 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-23 23:38:22,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2445 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-11-23 23:38:22,216 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-23 23:38:22,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-11-23 23:38:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:38:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:38:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-23 23:38:22,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-11-23 23:38:22,219 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-11-23 23:38:22,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-11-23 23:38:22,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:38:22,224 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-11-23 23:38:22,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-23 23:38:22,225 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-23 23:38:22,225 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-11-23 23:38:22,226 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) [2024-11-23 23:38:22,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:22,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:38:22,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:38:22,229 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:22,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 438911998, now seen corresponding path program 1 times [2024-11-23 23:38:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:22,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379719395] [2024-11-23 23:38:22,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379719395] [2024-11-23 23:38:22,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379719395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488509083] [2024-11-23 23:38:22,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:22,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:22,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:38:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:22,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:38:22,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:22,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:38:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:23,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:38:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488509083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:38:23,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:38:23,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:38:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186465465] [2024-11-23 23:38:23,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:38:23,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:38:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:23,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:38:23,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:38:23,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-23 23:38:23,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 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) [2024-11-23 23:38:23,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:23,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-23 23:38:23,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:24,011 INFO L124 PetriNetUnfolderBase]: 309/552 cut-off events. [2024-11-23 23:38:24,012 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-23 23:38:24,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 552 events. 309/552 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2423 event pairs, 250 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1056. Up to 498 conditions per place. [2024-11-23 23:38:24,020 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-23 23:38:24,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 161 flow [2024-11-23 23:38:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:38:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:38:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-23 23:38:24,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-11-23 23:38:24,022 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 6 states and 87 transitions. [2024-11-23 23:38:24,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 161 flow [2024-11-23 23:38:24,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:24,024 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-23 23:38:24,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-23 23:38:24,025 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-11-23 23:38:24,025 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-23 23:38:24,026 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) [2024-11-23 23:38:24,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:24,027 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:24,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:38:24,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:24,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:24,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash 952520465, now seen corresponding path program 1 times [2024-11-23 23:38:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:24,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167693140] [2024-11-23 23:38:24,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:24,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167693140] [2024-11-23 23:38:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167693140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:24,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:38:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544371545] [2024-11-23 23:38:24,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:24,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:38:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:24,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:38:24,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:38:24,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:24,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:24,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:24,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:24,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:24,574 INFO L124 PetriNetUnfolderBase]: 404/742 cut-off events. [2024-11-23 23:38:24,574 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-23 23:38:24,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 742 events. 404/742 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3420 event pairs, 186 based on Foata normal form. 22/525 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2024-11-23 23:38:24,582 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-23 23:38:24,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 246 flow [2024-11-23 23:38:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:38:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:38:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-11-23 23:38:24,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-11-23 23:38:24,588 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 3 states and 80 transitions. [2024-11-23 23:38:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 246 flow [2024-11-23 23:38:24,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-23 23:38:24,591 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2024-11-23 23:38:24,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-23 23:38:24,593 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-23 23:38:24,594 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2024-11-23 23:38:24,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:24,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:24,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:24,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:38:24,596 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:24,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -478344103, now seen corresponding path program 1 times [2024-11-23 23:38:24,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:24,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503489103] [2024-11-23 23:38:24,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:24,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503489103] [2024-11-23 23:38:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503489103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:24,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:38:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613509812] [2024-11-23 23:38:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:24,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:38:24,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:24,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:38:24,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:38:24,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-23 23:38:24,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-23 23:38:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:24,921 INFO L124 PetriNetUnfolderBase]: 303/568 cut-off events. [2024-11-23 23:38:24,921 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-23 23:38:24,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 568 events. 303/568 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2457 event pairs, 246 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 460. Up to 510 conditions per place. [2024-11-23 23:38:24,926 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 28 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-23 23:38:24,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 155 flow [2024-11-23 23:38:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:38:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:38:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-23 23:38:24,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-11-23 23:38:24,928 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 4 states and 65 transitions. [2024-11-23 23:38:24,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 155 flow [2024-11-23 23:38:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:24,930 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 96 flow [2024-11-23 23:38:24,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-23 23:38:24,931 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-23 23:38:24,931 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 96 flow [2024-11-23 23:38:24,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:24,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:24,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:24,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:38:24,932 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:24,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -478344102, now seen corresponding path program 1 times [2024-11-23 23:38:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127140829] [2024-11-23 23:38:24,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127140829] [2024-11-23 23:38:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127140829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:38:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126584845] [2024-11-23 23:38:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:25,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:38:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:25,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:38:25,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:38:25,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:25,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:25,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:25,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:25,292 INFO L124 PetriNetUnfolderBase]: 370/705 cut-off events. [2024-11-23 23:38:25,292 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-23 23:38:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 705 events. 370/705 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3142 event pairs, 314 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 1155. Up to 513 conditions per place. [2024-11-23 23:38:25,298 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 42 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-11-23 23:38:25,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-23 23:38:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:38:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:38:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-23 23:38:25,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-11-23 23:38:25,301 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 96 flow. Second operand 4 states and 85 transitions. [2024-11-23 23:38:25,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-23 23:38:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:38:25,305 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 101 flow [2024-11-23 23:38:25,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-23 23:38:25,308 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-23 23:38:25,308 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 101 flow [2024-11-23 23:38:25,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:25,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:25,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:25,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:38:25,309 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:25,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2126182847, now seen corresponding path program 1 times [2024-11-23 23:38:25,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:25,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370393056] [2024-11-23 23:38:25,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:25,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:38:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370393056] [2024-11-23 23:38:25,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370393056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253989455] [2024-11-23 23:38:25,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:25,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:25,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:25,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:38:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:25,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:38:25,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:38:25,950 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:38:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253989455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:25,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:38:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:38:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290282598] [2024-11-23 23:38:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:25,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:38:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:25,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:38:25,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:38:25,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:25,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:25,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:25,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:25,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:26,270 INFO L124 PetriNetUnfolderBase]: 281/562 cut-off events. [2024-11-23 23:38:26,270 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-23 23:38:26,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 562 events. 281/562 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2423 event pairs, 202 based on Foata normal form. 48/546 useless extension candidates. Maximal degree in co-relation 870. Up to 437 conditions per place. [2024-11-23 23:38:26,275 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 27 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-11-23 23:38:26,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 180 flow [2024-11-23 23:38:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:38:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:38:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-23 23:38:26,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-11-23 23:38:26,278 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 101 flow. Second operand 5 states and 84 transitions. [2024-11-23 23:38:26,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 180 flow [2024-11-23 23:38:26,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:38:26,282 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 104 flow [2024-11-23 23:38:26,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-11-23 23:38:26,283 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-23 23:38:26,283 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 104 flow [2024-11-23 23:38:26,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:26,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:26,284 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:26,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:38:26,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:26,489 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:26,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1091846263, now seen corresponding path program 1 times [2024-11-23 23:38:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:26,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936006555] [2024-11-23 23:38:26,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:26,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:26,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936006555] [2024-11-23 23:38:26,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936006555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:26,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:38:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644693738] [2024-11-23 23:38:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:26,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:38:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:26,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:38:26,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:38:26,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:26,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:26,794 INFO L124 PetriNetUnfolderBase]: 355/670 cut-off events. [2024-11-23 23:38:26,794 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2024-11-23 23:38:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 670 events. 355/670 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2774 event pairs, 220 based on Foata normal form. 3/600 useless extension candidates. Maximal degree in co-relation 1228. Up to 459 conditions per place. [2024-11-23 23:38:26,799 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-11-23 23:38:26,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 232 flow [2024-11-23 23:38:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:38:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:38:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-23 23:38:26,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-11-23 23:38:26,800 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 104 flow. Second operand 3 states and 68 transitions. [2024-11-23 23:38:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 232 flow [2024-11-23 23:38:26,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:38:26,803 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 97 flow [2024-11-23 23:38:26,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-23 23:38:26,804 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-23 23:38:26,804 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 97 flow [2024-11-23 23:38:26,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:26,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:26,805 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:26,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:38:26,805 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:26,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash 591459576, now seen corresponding path program 1 times [2024-11-23 23:38:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:26,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877932307] [2024-11-23 23:38:26,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:38:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877932307] [2024-11-23 23:38:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877932307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928511894] [2024-11-23 23:38:27,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:27,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:27,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:38:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:27,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:38:27,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:27,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 23:38:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:38:28,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:38:29,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-23 23:38:29,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:38:29,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-23 23:38:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:38:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928511894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:38:29,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:38:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-23 23:38:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073864032] [2024-11-23 23:38:29,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:38:29,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 23:38:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:29,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 23:38:29,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:38:29,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:29,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 97 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:29,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:29,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:29,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:31,326 INFO L124 PetriNetUnfolderBase]: 1195/2240 cut-off events. [2024-11-23 23:38:31,326 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2024-11-23 23:38:31,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 2240 events. 1195/2240 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12435 event pairs, 330 based on Foata normal form. 19/2014 useless extension candidates. Maximal degree in co-relation 3711. Up to 500 conditions per place. [2024-11-23 23:38:31,339 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 117 selfloop transitions, 30 changer transitions 30/182 dead transitions. [2024-11-23 23:38:31,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 182 transitions, 872 flow [2024-11-23 23:38:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:38:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-23 23:38:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 339 transitions. [2024-11-23 23:38:31,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49273255813953487 [2024-11-23 23:38:31,341 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 97 flow. Second operand 16 states and 339 transitions. [2024-11-23 23:38:31,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 182 transitions, 872 flow [2024-11-23 23:38:31,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 182 transitions, 848 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-23 23:38:31,346 INFO L231 Difference]: Finished difference. Result has 57 places, 66 transitions, 373 flow [2024-11-23 23:38:31,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=373, PETRI_PLACES=57, PETRI_TRANSITIONS=66} [2024-11-23 23:38:31,347 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-11-23 23:38:31,347 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 66 transitions, 373 flow [2024-11-23 23:38:31,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:31,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:31,347 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:31,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:38:31,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:31,553 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:31,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:31,558 INFO L85 PathProgramCache]: Analyzing trace with hash -794308070, now seen corresponding path program 1 times [2024-11-23 23:38:31,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:31,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628881921] [2024-11-23 23:38:31,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:31,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:38:31,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:31,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628881921] [2024-11-23 23:38:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628881921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:31,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:38:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648481411] [2024-11-23 23:38:31,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:31,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:38:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:31,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:38:31,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:38:31,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-11-23 23:38:31,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:31,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:31,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-11-23 23:38:31,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:32,018 INFO L124 PetriNetUnfolderBase]: 1252/2198 cut-off events. [2024-11-23 23:38:32,018 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2024-11-23 23:38:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 2198 events. 1252/2198 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11190 event pairs, 765 based on Foata normal form. 22/2066 useless extension candidates. Maximal degree in co-relation 4777. Up to 1737 conditions per place. [2024-11-23 23:38:32,030 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 65 selfloop transitions, 2 changer transitions 3/73 dead transitions. [2024-11-23 23:38:32,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 516 flow [2024-11-23 23:38:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:38:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:38:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-23 23:38:32,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-11-23 23:38:32,033 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 373 flow. Second operand 3 states and 64 transitions. [2024-11-23 23:38:32,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 516 flow [2024-11-23 23:38:32,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 460 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:32,044 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 262 flow [2024-11-23 23:38:32,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-11-23 23:38:32,046 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-11-23 23:38:32,047 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 262 flow [2024-11-23 23:38:32,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:32,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:32,048 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:32,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:38:32,048 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:32,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1568474757, now seen corresponding path program 2 times [2024-11-23 23:38:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632631022] [2024-11-23 23:38:32,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:38:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:32,088 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:38:32,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:38:32,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:32,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632631022] [2024-11-23 23:38:32,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632631022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:32,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:32,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:38:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937458462] [2024-11-23 23:38:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:32,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:38:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:32,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:38:32,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:38:32,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:32,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:32,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:32,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:32,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:32,670 INFO L124 PetriNetUnfolderBase]: 1050/1935 cut-off events. [2024-11-23 23:38:32,671 INFO L125 PetriNetUnfolderBase]: For 1032/1032 co-relation queries the response was YES. [2024-11-23 23:38:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 1935 events. 1050/1935 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10170 event pairs, 227 based on Foata normal form. 1/1802 useless extension candidates. Maximal degree in co-relation 3878. Up to 673 conditions per place. [2024-11-23 23:38:32,684 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 70 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2024-11-23 23:38:32,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 548 flow [2024-11-23 23:38:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:38:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:38:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-23 23:38:32,686 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-11-23 23:38:32,686 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 262 flow. Second operand 5 states and 114 transitions. [2024-11-23 23:38:32,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 548 flow [2024-11-23 23:38:32,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:32,697 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 291 flow [2024-11-23 23:38:32,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-11-23 23:38:32,698 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-11-23 23:38:32,698 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 291 flow [2024-11-23 23:38:32,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:32,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:32,699 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:32,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:38:32,699 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:32,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2051528508, now seen corresponding path program 3 times [2024-11-23 23:38:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:32,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441847899] [2024-11-23 23:38:32,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:38:32,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:32,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:38:32,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:38:32,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:32,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441847899] [2024-11-23 23:38:32,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441847899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425903287] [2024-11-23 23:38:32,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:38:32,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:32,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:32,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:32,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:38:32,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:38:32,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:32,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:38:32,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:38:32,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:38:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:38:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425903287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:38:33,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:38:33,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-23 23:38:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84413228] [2024-11-23 23:38:33,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:38:33,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:38:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:33,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:38:33,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:38:33,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:33,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:33,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:33,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:33,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:33,565 INFO L124 PetriNetUnfolderBase]: 1850/3503 cut-off events. [2024-11-23 23:38:33,565 INFO L125 PetriNetUnfolderBase]: For 2556/2556 co-relation queries the response was YES. [2024-11-23 23:38:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8575 conditions, 3503 events. 1850/3503 cut-off events. For 2556/2556 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 20960 event pairs, 670 based on Foata normal form. 40/3319 useless extension candidates. Maximal degree in co-relation 7725. Up to 1434 conditions per place. [2024-11-23 23:38:33,586 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 73 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-11-23 23:38:33,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 693 flow [2024-11-23 23:38:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:38:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:38:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-23 23:38:33,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-11-23 23:38:33,588 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 291 flow. Second operand 4 states and 93 transitions. [2024-11-23 23:38:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 693 flow [2024-11-23 23:38:33,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 650 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-23 23:38:33,602 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 497 flow [2024-11-23 23:38:33,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2024-11-23 23:38:33,603 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-11-23 23:38:33,604 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 497 flow [2024-11-23 23:38:33,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:33,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:33,604 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:33,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:38:33,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:33,805 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:33,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash 880675777, now seen corresponding path program 4 times [2024-11-23 23:38:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250382214] [2024-11-23 23:38:33,806 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:38:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:33,857 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:38:33,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:38:34,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250382214] [2024-11-23 23:38:34,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250382214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:34,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:34,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:38:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216627299] [2024-11-23 23:38:34,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:34,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:38:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:34,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:38:34,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:38:34,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-11-23 23:38:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:34,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-11-23 23:38:34,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:34,710 INFO L124 PetriNetUnfolderBase]: 2594/4508 cut-off events. [2024-11-23 23:38:34,710 INFO L125 PetriNetUnfolderBase]: For 4210/4210 co-relation queries the response was YES. [2024-11-23 23:38:34,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11945 conditions, 4508 events. 2594/4508 cut-off events. For 4210/4210 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24453 event pairs, 530 based on Foata normal form. 242/4408 useless extension candidates. Maximal degree in co-relation 11887. Up to 2229 conditions per place. [2024-11-23 23:38:34,746 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 80 selfloop transitions, 4 changer transitions 4/90 dead transitions. [2024-11-23 23:38:34,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 747 flow [2024-11-23 23:38:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:38:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:38:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-23 23:38:34,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-11-23 23:38:34,749 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 497 flow. Second operand 4 states and 76 transitions. [2024-11-23 23:38:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 747 flow [2024-11-23 23:38:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 733 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:34,760 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 395 flow [2024-11-23 23:38:34,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-23 23:38:34,762 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-11-23 23:38:34,762 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 395 flow [2024-11-23 23:38:34,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:34,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:34,763 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:34,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:38:34,764 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:34,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1610612813, now seen corresponding path program 1 times [2024-11-23 23:38:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577854758] [2024-11-23 23:38:34,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:35,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577854758] [2024-11-23 23:38:35,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577854758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195166690] [2024-11-23 23:38:35,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:35,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:35,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:35,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:38:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:36,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 23:38:36,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:36,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 23:38:36,717 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-23 23:38:36,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-23 23:38:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:36,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:38:37,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2024-11-23 23:38:37,990 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-23 23:38:37,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2024-11-23 23:38:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195166690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:38:39,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:38:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-11-23 23:38:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349308852] [2024-11-23 23:38:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:38:39,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 23:38:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:39,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 23:38:39,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-11-23 23:38:39,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:39,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 395 flow. Second operand has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:39,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:39,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:39,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:48,015 INFO L124 PetriNetUnfolderBase]: 6638/12739 cut-off events. [2024-11-23 23:38:48,015 INFO L125 PetriNetUnfolderBase]: For 16386/16394 co-relation queries the response was YES. [2024-11-23 23:38:48,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34709 conditions, 12739 events. 6638/12739 cut-off events. For 16386/16394 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 91776 event pairs, 939 based on Foata normal form. 83/11951 useless extension candidates. Maximal degree in co-relation 19942. Up to 2130 conditions per place. [2024-11-23 23:38:48,101 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 444 selfloop transitions, 151 changer transitions 110/712 dead transitions. [2024-11-23 23:38:48,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 712 transitions, 4347 flow [2024-11-23 23:38:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-23 23:38:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-23 23:38:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1288 transitions. [2024-11-23 23:38:48,110 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49104079298513154 [2024-11-23 23:38:48,110 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 395 flow. Second operand 61 states and 1288 transitions. [2024-11-23 23:38:48,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 712 transitions, 4347 flow [2024-11-23 23:38:48,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 712 transitions, 4341 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-23 23:38:48,140 INFO L231 Difference]: Finished difference. Result has 153 places, 204 transitions, 2216 flow [2024-11-23 23:38:48,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2216, PETRI_PLACES=153, PETRI_TRANSITIONS=204} [2024-11-23 23:38:48,143 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-11-23 23:38:48,143 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 204 transitions, 2216 flow [2024-11-23 23:38:48,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:48,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:38:48,144 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:48,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:38:48,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:38:48,348 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:38:48,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1535853325, now seen corresponding path program 2 times [2024-11-23 23:38:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579430866] [2024-11-23 23:38:48,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:38:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:48,406 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:38:48,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579430866] [2024-11-23 23:38:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579430866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:49,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697665061] [2024-11-23 23:38:49,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:38:49,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:49,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:49,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:38:50,050 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:38:50,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:38:50,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-23 23:38:50,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:38:50,788 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-23 23:38:50,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-23 23:38:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:50,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:38:51,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:38:51,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 131 [2024-11-23 23:38:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:38:53,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697665061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:38:53,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:38:53,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-23 23:38:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031904981] [2024-11-23 23:38:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:38:53,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-23 23:38:53,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:53,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-23 23:38:53,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-11-23 23:38:53,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:38:53,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 204 transitions, 2216 flow. Second operand has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:53,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:38:53,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:38:53,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:38:59,390 INFO L124 PetriNetUnfolderBase]: 10558/20150 cut-off events. [2024-11-23 23:38:59,390 INFO L125 PetriNetUnfolderBase]: For 202046/202046 co-relation queries the response was YES. [2024-11-23 23:38:59,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74840 conditions, 20150 events. 10558/20150 cut-off events. For 202046/202046 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 157302 event pairs, 4344 based on Foata normal form. 65/18857 useless extension candidates. Maximal degree in co-relation 73516. Up to 5491 conditions per place. [2024-11-23 23:38:59,556 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 76 changer transitions 156/461 dead transitions. [2024-11-23 23:38:59,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 461 transitions, 4878 flow [2024-11-23 23:38:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-23 23:38:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-23 23:38:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 427 transitions. [2024-11-23 23:38:59,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-11-23 23:38:59,559 INFO L175 Difference]: Start difference. First operand has 153 places, 204 transitions, 2216 flow. Second operand 21 states and 427 transitions. [2024-11-23 23:38:59,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 461 transitions, 4878 flow [2024-11-23 23:39:00,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 461 transitions, 3850 flow, removed 510 selfloop flow, removed 4 redundant places. [2024-11-23 23:39:00,247 INFO L231 Difference]: Finished difference. Result has 173 places, 216 transitions, 2002 flow [2024-11-23 23:39:00,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2002, PETRI_PLACES=173, PETRI_TRANSITIONS=216} [2024-11-23 23:39:00,249 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-11-23 23:39:00,249 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 216 transitions, 2002 flow [2024-11-23 23:39:00,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:00,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:39:00,250 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:00,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:39:00,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:00,454 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:39:00,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 802414837, now seen corresponding path program 3 times [2024-11-23 23:39:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:39:00,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298758484] [2024-11-23 23:39:00,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:39:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:39:00,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:39:00,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:00,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:39:00,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298758484] [2024-11-23 23:39:00,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298758484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:00,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54077930] [2024-11-23 23:39:00,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:39:00,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:00,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:00,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:39:00,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:39:00,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:00,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:39:00,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:01,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:01,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:39:01,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-23 23:39:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54077930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:01,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:39:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-23 23:39:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344570504] [2024-11-23 23:39:01,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:01,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:39:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:39:01,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:39:01,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:39:01,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:39:01,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 216 transitions, 2002 flow. Second operand has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:01,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:39:01,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:39:01,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:39:04,936 INFO L124 PetriNetUnfolderBase]: 9084/17430 cut-off events. [2024-11-23 23:39:04,936 INFO L125 PetriNetUnfolderBase]: For 203385/203385 co-relation queries the response was YES. [2024-11-23 23:39:05,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64359 conditions, 17430 events. 9084/17430 cut-off events. For 203385/203385 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 133230 event pairs, 3322 based on Foata normal form. 15/16278 useless extension candidates. Maximal degree in co-relation 63820. Up to 8935 conditions per place. [2024-11-23 23:39:05,067 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 244 selfloop transitions, 48 changer transitions 42/341 dead transitions. [2024-11-23 23:39:05,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 341 transitions, 3500 flow [2024-11-23 23:39:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:39:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 23:39:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-11-23 23:39:05,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-11-23 23:39:05,069 INFO L175 Difference]: Start difference. First operand has 173 places, 216 transitions, 2002 flow. Second operand 11 states and 253 transitions. [2024-11-23 23:39:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 341 transitions, 3500 flow [2024-11-23 23:39:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 341 transitions, 3267 flow, removed 97 selfloop flow, removed 13 redundant places. [2024-11-23 23:39:05,406 INFO L231 Difference]: Finished difference. Result has 166 places, 224 transitions, 2078 flow [2024-11-23 23:39:05,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2078, PETRI_PLACES=166, PETRI_TRANSITIONS=224} [2024-11-23 23:39:05,409 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-11-23 23:39:05,409 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 224 transitions, 2078 flow [2024-11-23 23:39:05,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:05,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:39:05,410 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:05,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:39:05,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:05,614 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:39:05,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1192951734, now seen corresponding path program 4 times [2024-11-23 23:39:05,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:39:05,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467218429] [2024-11-23 23:39:05,615 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:39:05,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:39:05,670 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:39:05,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:39:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:39:06,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467218429] [2024-11-23 23:39:06,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467218429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:06,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504184165] [2024-11-23 23:39:06,646 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:39:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:06,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:06,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:39:06,753 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:39:06,753 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:06,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:39:06,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:39:07,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:07,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:39:07,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-23 23:39:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:39:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504184165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:07,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:39:07,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2024-11-23 23:39:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579054980] [2024-11-23 23:39:07,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:07,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:39:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:39:07,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:39:07,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:39:07,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:39:07,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 224 transitions, 2078 flow. Second operand has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:07,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:39:07,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:39:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:39:11,087 INFO L124 PetriNetUnfolderBase]: 9336/17926 cut-off events. [2024-11-23 23:39:11,087 INFO L125 PetriNetUnfolderBase]: For 156865/156865 co-relation queries the response was YES. [2024-11-23 23:39:11,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63698 conditions, 17926 events. 9336/17926 cut-off events. For 156865/156865 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 137607 event pairs, 3905 based on Foata normal form. 2/16721 useless extension candidates. Maximal degree in co-relation 63552. Up to 12649 conditions per place. [2024-11-23 23:39:11,216 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 253 selfloop transitions, 34 changer transitions 44/338 dead transitions. [2024-11-23 23:39:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 338 transitions, 3394 flow [2024-11-23 23:39:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:39:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:39:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 307 transitions. [2024-11-23 23:39:11,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475968992248062 [2024-11-23 23:39:11,218 INFO L175 Difference]: Start difference. First operand has 166 places, 224 transitions, 2078 flow. Second operand 15 states and 307 transitions. [2024-11-23 23:39:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 338 transitions, 3394 flow [2024-11-23 23:39:11,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 338 transitions, 3273 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-11-23 23:39:11,536 INFO L231 Difference]: Finished difference. Result has 175 places, 226 transitions, 2081 flow [2024-11-23 23:39:11,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2081, PETRI_PLACES=175, PETRI_TRANSITIONS=226} [2024-11-23 23:39:11,537 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-11-23 23:39:11,537 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 226 transitions, 2081 flow [2024-11-23 23:39:11,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:11,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:39:11,538 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:11,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:39:11,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:11,739 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:39:11,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1300244017, now seen corresponding path program 5 times [2024-11-23 23:39:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:39:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715306986] [2024-11-23 23:39:11,740 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:39:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:39:11,762 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-23 23:39:11,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:39:11,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:39:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715306986] [2024-11-23 23:39:11,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715306986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287863096] [2024-11-23 23:39:11,854 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:39:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:11,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:39:11,958 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-23 23:39:11,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:11,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:39:11,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:39:12,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:39:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287863096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:12,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:39:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-23 23:39:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111362172] [2024-11-23 23:39:12,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:12,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:39:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:39:12,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:39:12,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:39:12,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-23 23:39:12,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 226 transitions, 2081 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:12,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:39:12,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-23 23:39:12,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:39:16,129 INFO L124 PetriNetUnfolderBase]: 11130/21526 cut-off events. [2024-11-23 23:39:16,129 INFO L125 PetriNetUnfolderBase]: For 179205/179205 co-relation queries the response was YES. [2024-11-23 23:39:16,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75882 conditions, 21526 events. 11130/21526 cut-off events. For 179205/179205 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 168420 event pairs, 3352 based on Foata normal form. 62/20154 useless extension candidates. Maximal degree in co-relation 75218. Up to 9565 conditions per place. [2024-11-23 23:39:16,298 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 181 selfloop transitions, 118 changer transitions 0/306 dead transitions. [2024-11-23 23:39:16,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 306 transitions, 3384 flow [2024-11-23 23:39:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:39:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:39:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-23 23:39:16,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2024-11-23 23:39:16,299 INFO L175 Difference]: Start difference. First operand has 175 places, 226 transitions, 2081 flow. Second operand 5 states and 118 transitions. [2024-11-23 23:39:16,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 306 transitions, 3384 flow [2024-11-23 23:39:16,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 306 transitions, 3271 flow, removed 23 selfloop flow, removed 13 redundant places. [2024-11-23 23:39:16,732 INFO L231 Difference]: Finished difference. Result has 167 places, 263 transitions, 2889 flow [2024-11-23 23:39:16,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2889, PETRI_PLACES=167, PETRI_TRANSITIONS=263} [2024-11-23 23:39:16,732 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-11-23 23:39:16,733 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 263 transitions, 2889 flow [2024-11-23 23:39:16,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:16,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:39:16,733 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:16,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:39:16,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:39:16,933 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-23 23:39:16,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 667395480, now seen corresponding path program 6 times [2024-11-23 23:39:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:39:16,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404367918] [2024-11-23 23:39:16,934 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:39:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:39:16,994 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-23 23:39:16,994 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:39:19,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:39:19,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404367918] [2024-11-23 23:39:19,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404367918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:19,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927747609] [2024-11-23 23:39:19,109 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:39:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:19,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:19,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d36d36-4e0b-4122-83af-7d7ea6e27b91/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:39:19,208 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-23 23:39:19,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:19,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-23 23:39:19,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:19,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 23:39:20,605 INFO L349 Elim1Store]: treesize reduction 99, result has 9.2 percent of original size [2024-11-23 23:39:20,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 27 [2024-11-23 23:39:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:39:20,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:23,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 188 [2024-11-23 23:39:23,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:39:23,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 534 treesize of output 590