./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd --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 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:03:34,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:03:34,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:03:34,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:03:34,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:03:34,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:03:34,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:03:34,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:03:34,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:03:34,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:03:34,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:03:34,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:03:34,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:03:34,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:03:34,762 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:03:34,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:03:34,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:03:34,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:03:34,763 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:03:34,764 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:03:34,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:03:34,764 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:03:34,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:03:34,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:03:34,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:03:34,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:03:34,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:03:34,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:03:34,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:03:34,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:03:34,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:03:34,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:03:34,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:03:34,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:03:34,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:03:34,767 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_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd 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 -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-13 14:03:35,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:03:35,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:03:35,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:03:35,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:03:35,158 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:03:35,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c Unable to find full path for "g++" [2024-11-13 14:03:37,053 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:03:37,364 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:03:37,365 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-13 14:03:37,376 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/data/b5f0dab1a/281a1b0ffc6149c0a0a6031b5551884f/FLAG055a30aec [2024-11-13 14:03:37,405 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/data/b5f0dab1a/281a1b0ffc6149c0a0a6031b5551884f [2024-11-13 14:03:37,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:03:37,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:03:37,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:03:37,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:03:37,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:03:37,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd83fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37, skipping insertion in model container [2024-11-13 14:03:37,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,464 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:03:37,726 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 14:03:37,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:03:37,743 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:03:37,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:03:37,799 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:03:37,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37 WrapperNode [2024-11-13 14:03:37,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:03:37,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:03:37,802 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:03:37,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:03:37,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,862 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2024-11-13 14:03:37,862 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:03:37,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:03:37,863 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:03:37,863 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:03:37,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,912 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 14:03:37,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,932 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:03:37,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:03:37,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:03:37,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:03:37,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (1/1) ... [2024-11-13 14:03:37,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:03:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:38,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:03:38,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:03:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:03:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:03:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:03:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:03:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:03:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 14:03:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 14:03:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-13 14:03:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-13 14:03:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:03:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:03:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:03:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:03:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:03:38,055 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:03:38,216 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:03:38,219 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:03:38,990 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:03:38,990 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:03:39,616 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:03:39,616 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-13 14:03:39,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:03:39 BoogieIcfgContainer [2024-11-13 14:03:39,617 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:03:39,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:03:39,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:03:39,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:03:39,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:03:37" (1/3) ... [2024-11-13 14:03:39,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0373f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:03:39, skipping insertion in model container [2024-11-13 14:03:39,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:03:37" (2/3) ... [2024-11-13 14:03:39,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0373f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:03:39, skipping insertion in model container [2024-11-13 14:03:39,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:03:39" (3/3) ... [2024-11-13 14:03:39,639 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-13 14:03:39,662 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:03:39,663 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt.wvr.c that has 5 procedures, 61 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2024-11-13 14:03:39,664 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:03:39,797 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 14:03:39,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2024-11-13 14:03:39,920 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2024-11-13 14:03:39,923 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 14:03:39,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 147 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-13 14:03:39,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2024-11-13 14:03:39,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2024-11-13 14:03:39,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:03:39,975 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;@7fc18af0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:03:39,975 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-13 14:03:39,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:03:39,985 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 14:03:39,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:03:39,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:39,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:03:39,987 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:39,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 886520, now seen corresponding path program 1 times [2024-11-13 14:03:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:40,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769443001] [2024-11-13 14:03:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:40,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769443001] [2024-11-13 14:03:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769443001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:40,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:03:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245145567] [2024-11-13 14:03:40,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:40,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:03:40,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:03:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:03:40,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:40,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:40,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:40,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:40,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:43,174 INFO L124 PetriNetUnfolderBase]: 9651/13484 cut-off events. [2024-11-13 14:03:43,174 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-13 14:03:43,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 13484 events. 9651/13484 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88149 event pairs, 6408 based on Foata normal form. 1/7977 useless extension candidates. Maximal degree in co-relation 24428. Up to 11896 conditions per place. [2024-11-13 14:03:43,337 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-13 14:03:43,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 214 flow [2024-11-13 14:03:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:03:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:03:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-13 14:03:43,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-11-13 14:03:43,357 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 113 transitions. [2024-11-13 14:03:43,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 214 flow [2024-11-13 14:03:43,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 14:03:43,435 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2024-11-13 14:03:43,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-13 14:03:43,444 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-11-13 14:03:43,444 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2024-11-13 14:03:43,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:43,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:43,445 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:03:43,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:03:43,446 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:43,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash 886521, now seen corresponding path program 1 times [2024-11-13 14:03:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:43,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420697215] [2024-11-13 14:03:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:43,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420697215] [2024-11-13 14:03:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420697215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:44,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:03:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542489032] [2024-11-13 14:03:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:44,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:03:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:03:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:03:44,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:44,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-13 14:03:44,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:44,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:44,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:46,103 INFO L124 PetriNetUnfolderBase]: 9652/13487 cut-off events. [2024-11-13 14:03:46,103 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-13 14:03:46,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 13487 events. 9652/13487 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88312 event pairs, 6408 based on Foata normal form. 0/7977 useless extension candidates. Maximal degree in co-relation 25592. Up to 11905 conditions per place. [2024-11-13 14:03:46,216 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 39 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-13 14:03:46,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 218 flow [2024-11-13 14:03:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:03:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:03:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-13 14:03:46,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-13 14:03:46,220 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 140 transitions. [2024-11-13 14:03:46,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 218 flow [2024-11-13 14:03:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:03:46,225 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 149 flow [2024-11-13 14:03:46,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-13 14:03:46,227 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-11-13 14:03:46,227 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 149 flow [2024-11-13 14:03:46,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-13 14:03:46,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:46,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 14:03:46,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:03:46,228 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:46,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash 27484203, now seen corresponding path program 1 times [2024-11-13 14:03:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:46,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944519277] [2024-11-13 14:03:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944519277] [2024-11-13 14:03:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944519277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:46,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:03:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402044637] [2024-11-13 14:03:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:46,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:03:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:03:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:03:46,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:46,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:46,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:46,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:46,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:48,228 INFO L124 PetriNetUnfolderBase]: 9653/13490 cut-off events. [2024-11-13 14:03:48,228 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-13 14:03:48,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25638 conditions, 13490 events. 9653/13490 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88205 event pairs, 6408 based on Foata normal form. 0/7979 useless extension candidates. Maximal degree in co-relation 25613. Up to 11904 conditions per place. [2024-11-13 14:03:48,329 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 39 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-13 14:03:48,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 247 flow [2024-11-13 14:03:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:03:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:03:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-13 14:03:48,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2024-11-13 14:03:48,334 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 149 flow. Second operand 5 states and 167 transitions. [2024-11-13 14:03:48,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 247 flow [2024-11-13 14:03:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:03:48,336 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 183 flow [2024-11-13 14:03:48,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-11-13 14:03:48,339 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 14:03:48,339 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 183 flow [2024-11-13 14:03:48,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:48,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:48,340 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 14:03:48,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:03:48,341 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:48,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash 851975990, now seen corresponding path program 1 times [2024-11-13 14:03:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:48,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916487184] [2024-11-13 14:03:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:48,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:48,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:48,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916487184] [2024-11-13 14:03:48,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916487184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914007218] [2024-11-13 14:03:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:48,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:48,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:48,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:48,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:03:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:48,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 14:03:48,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:49,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 14:03:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:49,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914007218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:49,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 14:03:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421000927] [2024-11-13 14:03:49,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:49,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:03:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:03:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:03:49,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:49,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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) [2024-11-13 14:03:49,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:49,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:51,549 INFO L124 PetriNetUnfolderBase]: 9653/13489 cut-off events. [2024-11-13 14:03:51,549 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-13 14:03:51,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25651 conditions, 13489 events. 9653/13489 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88258 event pairs, 6408 based on Foata normal form. 0/7981 useless extension candidates. Maximal degree in co-relation 25623. Up to 11904 conditions per place. [2024-11-13 14:03:51,631 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-11-13 14:03:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 269 flow [2024-11-13 14:03:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:03:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:03:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-11-13 14:03:51,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-11-13 14:03:51,634 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-11-13 14:03:51,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 269 flow [2024-11-13 14:03:51,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:03:51,636 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 192 flow [2024-11-13 14:03:51,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-11-13 14:03:51,637 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-13 14:03:51,638 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 192 flow [2024-11-13 14:03:51,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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) [2024-11-13 14:03:51,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:51,638 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 14:03:51,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:03:51,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:51,844 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:51,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash 642543740, now seen corresponding path program 1 times [2024-11-13 14:03:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:51,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538333028] [2024-11-13 14:03:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:51,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538333028] [2024-11-13 14:03:52,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538333028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308148727] [2024-11-13 14:03:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:52,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:52,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:52,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:03:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:52,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 14:03:52,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:52,321 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 [2024-11-13 14:03:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:52,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308148727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:52,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 14:03:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589863710] [2024-11-13 14:03:52,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:52,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:03:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:03:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:03:52,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:52,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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) [2024-11-13 14:03:52,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:52,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:54,448 INFO L124 PetriNetUnfolderBase]: 9653/13488 cut-off events. [2024-11-13 14:03:54,448 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-13 14:03:54,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25655 conditions, 13488 events. 9653/13488 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88346 event pairs, 6408 based on Foata normal form. 0/7981 useless extension candidates. Maximal degree in co-relation 25622. Up to 11896 conditions per place. [2024-11-13 14:03:54,535 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 32 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2024-11-13 14:03:54,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 276 flow [2024-11-13 14:03:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:03:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 14:03:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-13 14:03:54,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-13 14:03:54,537 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 192 flow. Second operand 7 states and 213 transitions. [2024-11-13 14:03:54,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 276 flow [2024-11-13 14:03:54,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 242 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-13 14:03:54,543 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 178 flow [2024-11-13 14:03:54,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-13 14:03:54,547 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 14:03:54,547 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 178 flow [2024-11-13 14:03:54,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 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) [2024-11-13 14:03:54,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:54,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:54,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:03:54,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:54,749 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:54,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash -915907393, now seen corresponding path program 1 times [2024-11-13 14:03:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516215886] [2024-11-13 14:03:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516215886] [2024-11-13 14:03:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516215886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:54,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:54,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:03:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846120233] [2024-11-13 14:03:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:54,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:03:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:03:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:03:54,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:03:54,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-11-13 14:03:54,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:54,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:03:54,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:56,014 INFO L124 PetriNetUnfolderBase]: 10696/14779 cut-off events. [2024-11-13 14:03:56,014 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-13 14:03:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28409 conditions, 14779 events. 10696/14779 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 96610 event pairs, 7188 based on Foata normal form. 310/9056 useless extension candidates. Maximal degree in co-relation 25256. Up to 11905 conditions per place. [2024-11-13 14:03:56,091 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 69 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-13 14:03:56,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 420 flow [2024-11-13 14:03:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:03:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:03:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-11-13 14:03:56,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-11-13 14:03:56,093 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 178 flow. Second operand 5 states and 207 transitions. [2024-11-13 14:03:56,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 420 flow [2024-11-13 14:03:56,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 381 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 14:03:56,096 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 192 flow [2024-11-13 14:03:56,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-13 14:03:56,097 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-13 14:03:56,098 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 192 flow [2024-11-13 14:03:56,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-11-13 14:03:56,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:56,098 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:56,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:03:56,098 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:56,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 61104802, now seen corresponding path program 1 times [2024-11-13 14:03:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654083258] [2024-11-13 14:03:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:03:56,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654083258] [2024-11-13 14:03:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654083258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:56,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:03:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700563249] [2024-11-13 14:03:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:56,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:03:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:03:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:03:56,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:56,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-13 14:03:56,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:56,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:56,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:57,069 INFO L124 PetriNetUnfolderBase]: 7339/10713 cut-off events. [2024-11-13 14:03:57,070 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-11-13 14:03:57,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22212 conditions, 10713 events. 7339/10713 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 73203 event pairs, 5000 based on Foata normal form. 0/6859 useless extension candidates. Maximal degree in co-relation 19084. Up to 9261 conditions per place. [2024-11-13 14:03:57,120 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-11-13 14:03:57,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 272 flow [2024-11-13 14:03:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:03:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:03:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-13 14:03:57,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47878787878787876 [2024-11-13 14:03:57,122 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 192 flow. Second operand 5 states and 158 transitions. [2024-11-13 14:03:57,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 272 flow [2024-11-13 14:03:57,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:03:57,128 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 191 flow [2024-11-13 14:03:57,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-13 14:03:57,129 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-13 14:03:57,129 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 191 flow [2024-11-13 14:03:57,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-13 14:03:57,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:57,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:57,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:03:57,129 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:57,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash 61104803, now seen corresponding path program 1 times [2024-11-13 14:03:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242930629] [2024-11-13 14:03:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:57,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:57,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242930629] [2024-11-13 14:03:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242930629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:57,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074045339] [2024-11-13 14:03:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:57,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:57,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:57,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:03:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:57,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:03:57,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:57,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 14:03:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:03:57,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 14:03:57,727 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:03:57,728 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 11 treesize of output 11 [2024-11-13 14:03:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:57,765 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:03:57,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074045339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:57,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:03:57,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-13 14:03:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776590511] [2024-11-13 14:03:57,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:57,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:03:57,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:03:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:03:57,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:57,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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) [2024-11-13 14:03:57,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:57,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:58,848 INFO L124 PetriNetUnfolderBase]: 4701/7063 cut-off events. [2024-11-13 14:03:58,849 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2024-11-13 14:03:58,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 7063 events. 4701/7063 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47557 event pairs, 3256 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 10914. Up to 6049 conditions per place. [2024-11-13 14:03:58,912 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 39 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-13 14:03:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 267 flow [2024-11-13 14:03:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:03:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:03:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-13 14:03:58,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 14:03:58,915 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 191 flow. Second operand 4 states and 132 transitions. [2024-11-13 14:03:58,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 267 flow [2024-11-13 14:03:58,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:03:58,918 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 180 flow [2024-11-13 14:03:58,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-13 14:03:58,920 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2024-11-13 14:03:58,920 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 180 flow [2024-11-13 14:03:58,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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) [2024-11-13 14:03:58,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:58,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:58,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 14:03:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:59,121 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:59,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash -255955110, now seen corresponding path program 1 times [2024-11-13 14:03:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:59,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442510686] [2024-11-13 14:03:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:59,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442510686] [2024-11-13 14:03:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442510686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:59,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:59,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:03:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017826925] [2024-11-13 14:03:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:59,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:03:59,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:03:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:03:59,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:03:59,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-13 14:03:59,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:59,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:03:59,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:59,848 INFO L124 PetriNetUnfolderBase]: 3151/5000 cut-off events. [2024-11-13 14:03:59,848 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-13 14:03:59,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 5000 events. 3151/5000 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33702 event pairs, 2196 based on Foata normal form. 0/3984 useless extension candidates. Maximal degree in co-relation 7627. Up to 4084 conditions per place. [2024-11-13 14:03:59,869 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 36 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-13 14:03:59,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 256 flow [2024-11-13 14:03:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:03:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:03:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-13 14:03:59,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-11-13 14:03:59,871 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 180 flow. Second operand 4 states and 130 transitions. [2024-11-13 14:03:59,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 256 flow [2024-11-13 14:03:59,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:03:59,873 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 180 flow [2024-11-13 14:03:59,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-13 14:03:59,874 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-13 14:03:59,874 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 180 flow [2024-11-13 14:03:59,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-13 14:03:59,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:59,875 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:59,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:03:59,875 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:03:59,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash -255955109, now seen corresponding path program 1 times [2024-11-13 14:03:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:59,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249036427] [2024-11-13 14:03:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249036427] [2024-11-13 14:03:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249036427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:03:59,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:03:59,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:03:59,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454875161] [2024-11-13 14:03:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:03:59,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:03:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:03:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:03:59,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:03:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-11-13 14:03:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:03:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:00,564 INFO L124 PetriNetUnfolderBase]: 3669/5895 cut-off events. [2024-11-13 14:04:00,564 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-13 14:04:00,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5895 events. 3669/5895 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41240 event pairs, 2627 based on Foata normal form. 128/4926 useless extension candidates. Maximal degree in co-relation 9111. Up to 4094 conditions per place. [2024-11-13 14:04:00,584 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 54 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2024-11-13 14:04:00,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 352 flow [2024-11-13 14:04:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:04:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:04:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-13 14:04:00,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-11-13 14:04:00,586 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 180 flow. Second operand 4 states and 163 transitions. [2024-11-13 14:04:00,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 352 flow [2024-11-13 14:04:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:04:00,588 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 197 flow [2024-11-13 14:04:00,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-13 14:04:00,589 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 14:04:00,589 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 197 flow [2024-11-13 14:04:00,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-11-13 14:04:00,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:00,590 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:00,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 14:04:00,590 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:00,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1395932908, now seen corresponding path program 1 times [2024-11-13 14:04:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312262912] [2024-11-13 14:04:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:00,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312262912] [2024-11-13 14:04:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312262912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:04:00,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:04:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:04:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059147426] [2024-11-13 14:04:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:00,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:04:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:04:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:04:00,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:04:00,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-13 14:04:00,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:00,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:04:00,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:01,408 INFO L124 PetriNetUnfolderBase]: 2429/4116 cut-off events. [2024-11-13 14:04:01,408 INFO L125 PetriNetUnfolderBase]: For 957/957 co-relation queries the response was YES. [2024-11-13 14:04:01,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 4116 events. 2429/4116 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28761 event pairs, 1773 based on Foata normal form. 0/3609 useless extension candidates. Maximal degree in co-relation 6637. Up to 3292 conditions per place. [2024-11-13 14:04:01,427 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 33 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-13 14:04:01,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 265 flow [2024-11-13 14:04:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:04:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:04:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-13 14:04:01,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-13 14:04:01,428 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 197 flow. Second operand 4 states and 136 transitions. [2024-11-13 14:04:01,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 265 flow [2024-11-13 14:04:01,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:04:01,431 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 195 flow [2024-11-13 14:04:01,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-11-13 14:04:01,432 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 14:04:01,432 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 195 flow [2024-11-13 14:04:01,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-13 14:04:01,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:01,432 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:01,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:04:01,432 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:01,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1173091936, now seen corresponding path program 1 times [2024-11-13 14:04:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648843626] [2024-11-13 14:04:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648843626] [2024-11-13 14:04:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648843626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:04:01,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:04:01,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:04:01,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264725014] [2024-11-13 14:04:01,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:01,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:04:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:04:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:04:01,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:04:01,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-11-13 14:04:01,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:01,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:04:01,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:02,382 INFO L124 PetriNetUnfolderBase]: 3348/5287 cut-off events. [2024-11-13 14:04:02,382 INFO L125 PetriNetUnfolderBase]: For 1202/1202 co-relation queries the response was YES. [2024-11-13 14:04:02,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11508 conditions, 5287 events. 3348/5287 cut-off events. For 1202/1202 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35145 event pairs, 322 based on Foata normal form. 252/5413 useless extension candidates. Maximal degree in co-relation 9860. Up to 2532 conditions per place. [2024-11-13 14:04:02,414 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 62 selfloop transitions, 5 changer transitions 3/85 dead transitions. [2024-11-13 14:04:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 415 flow [2024-11-13 14:04:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:04:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:04:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-13 14:04:02,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-11-13 14:04:02,416 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 195 flow. Second operand 5 states and 183 transitions. [2024-11-13 14:04:02,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 415 flow [2024-11-13 14:04:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:04:02,419 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 177 flow [2024-11-13 14:04:02,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-11-13 14:04:02,420 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-13 14:04:02,420 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 177 flow [2024-11-13 14:04:02,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-11-13 14:04:02,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:02,420 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:02,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:04:02,420 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:02,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash -497583640, now seen corresponding path program 1 times [2024-11-13 14:04:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868538461] [2024-11-13 14:04:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:04:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868538461] [2024-11-13 14:04:02,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868538461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:04:02,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:04:02,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:04:02,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156261802] [2024-11-13 14:04:02,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:02,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:04:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:04:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:04:02,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 14:04:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2024-11-13 14:04:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:02,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 14:04:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:03,518 INFO L124 PetriNetUnfolderBase]: 4867/7104 cut-off events. [2024-11-13 14:04:03,518 INFO L125 PetriNetUnfolderBase]: For 2540/2816 co-relation queries the response was YES. [2024-11-13 14:04:03,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 7104 events. 4867/7104 cut-off events. For 2540/2816 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 43599 event pairs, 473 based on Foata normal form. 517/7541 useless extension candidates. Maximal degree in co-relation 16839. Up to 4100 conditions per place. [2024-11-13 14:04:03,552 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 72 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-11-13 14:04:03,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 463 flow [2024-11-13 14:04:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:04:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:04:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-13 14:04:03,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-11-13 14:04:03,554 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 177 flow. Second operand 6 states and 219 transitions. [2024-11-13 14:04:03,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 463 flow [2024-11-13 14:04:03,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 448 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-13 14:04:03,557 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 221 flow [2024-11-13 14:04:03,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-11-13 14:04:03,557 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-13 14:04:03,557 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 221 flow [2024-11-13 14:04:03,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2024-11-13 14:04:03,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:03,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:03,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 14:04:03,558 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:03,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:03,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1331011366, now seen corresponding path program 2 times [2024-11-13 14:04:03,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:03,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60122696] [2024-11-13 14:04:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:04:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60122696] [2024-11-13 14:04:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60122696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080334058] [2024-11-13 14:04:03,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:04:03,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:03,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:03,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:03,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:04:03,984 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:04:03,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:04:03,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:04:03,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:04:04,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:04:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080334058] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:04,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:04:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2024-11-13 14:04:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562996594] [2024-11-13 14:04:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:04,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:04:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:04:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:04:04,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-13 14:04:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2024-11-13 14:04:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:04,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-13 14:04:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:05,753 INFO L124 PetriNetUnfolderBase]: 10308/14602 cut-off events. [2024-11-13 14:04:05,754 INFO L125 PetriNetUnfolderBase]: For 9249/9613 co-relation queries the response was YES. [2024-11-13 14:04:05,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38994 conditions, 14602 events. 10308/14602 cut-off events. For 9249/9613 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 93345 event pairs, 953 based on Foata normal form. 561/14851 useless extension candidates. Maximal degree in co-relation 38964. Up to 5305 conditions per place. [2024-11-13 14:04:05,846 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-11-13 14:04:05,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 631 flow [2024-11-13 14:04:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:04:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:04:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-11-13 14:04:05,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-11-13 14:04:05,848 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 221 flow. Second operand 6 states and 224 transitions. [2024-11-13 14:04:05,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 631 flow [2024-11-13 14:04:05,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 624 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:04:05,862 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 319 flow [2024-11-13 14:04:05,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-13 14:04:05,863 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-13 14:04:05,863 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 319 flow [2024-11-13 14:04:05,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2024-11-13 14:04:05,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:05,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:05,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:04:06,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 14:04:06,064 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:06,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1945914084, now seen corresponding path program 1 times [2024-11-13 14:04:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:06,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574026253] [2024-11-13 14:04:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574026253] [2024-11-13 14:04:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574026253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688321904] [2024-11-13 14:04:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:07,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:07,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:07,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:07,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:04:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:07,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:04:07,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:07,346 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 [2024-11-13 14:04:07,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 14:04:07,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 14:04:07,888 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 15 treesize of output 7 [2024-11-13 14:04:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:07,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:08,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-13 14:04:08,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 14:04:08,861 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 39 treesize of output 35 [2024-11-13 14:04:08,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-13 14:04:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688321904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:04:08,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:04:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-13 14:04:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252284531] [2024-11-13 14:04:08,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:04:08,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:04:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:04:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:04:09,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:04:09,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 319 flow. Second operand has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 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) [2024-11-13 14:04:09,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:09,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:04:09,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:17,020 INFO L124 PetriNetUnfolderBase]: 23837/37201 cut-off events. [2024-11-13 14:04:17,021 INFO L125 PetriNetUnfolderBase]: For 60956/63412 co-relation queries the response was YES. [2024-11-13 14:04:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110770 conditions, 37201 events. 23837/37201 cut-off events. For 60956/63412 co-relation queries the response was YES. Maximal size of possible extension queue 1838. Compared 292236 event pairs, 882 based on Foata normal form. 1541/38018 useless extension candidates. Maximal degree in co-relation 60014. Up to 11613 conditions per place. [2024-11-13 14:04:17,235 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 313 selfloop transitions, 76 changer transitions 6/419 dead transitions. [2024-11-13 14:04:17,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 419 transitions, 2598 flow [2024-11-13 14:04:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 14:04:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 14:04:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1095 transitions. [2024-11-13 14:04:17,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925324675324676 [2024-11-13 14:04:17,239 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 319 flow. Second operand 28 states and 1095 transitions. [2024-11-13 14:04:17,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 419 transitions, 2598 flow [2024-11-13 14:04:17,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 419 transitions, 2569 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-13 14:04:17,291 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1133 flow [2024-11-13 14:04:17,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1133, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-11-13 14:04:17,292 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 48 predicate places. [2024-11-13 14:04:17,292 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1133 flow [2024-11-13 14:04:17,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 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) [2024-11-13 14:04:17,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:17,293 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:17,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:04:17,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:04:17,497 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:17,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash -153339408, now seen corresponding path program 1 times [2024-11-13 14:04:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:17,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373792807] [2024-11-13 14:04:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:18,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:18,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373792807] [2024-11-13 14:04:18,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373792807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:18,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660310364] [2024-11-13 14:04:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:18,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:18,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:18,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:04:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:18,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 14:04:18,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:19,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 14:04:19,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 14:04:19,103 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 23 treesize of output 7 [2024-11-13 14:04:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:04:19,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:19,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:04:19,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-13 14:04:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:04:19,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660310364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:04:19,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:04:19,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 15 [2024-11-13 14:04:19,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559743090] [2024-11-13 14:04:19,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:04:19,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 14:04:19,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:19,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 14:04:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-13 14:04:19,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:04:19,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1133 flow. Second operand has 16 states, 16 states have (on average 30.25) internal successors, (484), 16 states have internal predecessors, (484), 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) [2024-11-13 14:04:19,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:19,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:04:19,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:26,954 INFO L124 PetriNetUnfolderBase]: 27823/43385 cut-off events. [2024-11-13 14:04:26,954 INFO L125 PetriNetUnfolderBase]: For 129507/132299 co-relation queries the response was YES. [2024-11-13 14:04:27,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143547 conditions, 43385 events. 27823/43385 cut-off events. For 129507/132299 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 351028 event pairs, 2101 based on Foata normal form. 1446/44193 useless extension candidates. Maximal degree in co-relation 139688. Up to 20261 conditions per place. [2024-11-13 14:04:27,347 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 175 selfloop transitions, 61 changer transitions 1/261 dead transitions. [2024-11-13 14:04:27,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 261 transitions, 2229 flow [2024-11-13 14:04:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:04:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 14:04:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 534 transitions. [2024-11-13 14:04:27,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-11-13 14:04:27,350 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1133 flow. Second operand 15 states and 534 transitions. [2024-11-13 14:04:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 261 transitions, 2229 flow [2024-11-13 14:04:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 261 transitions, 2113 flow, removed 57 selfloop flow, removed 1 redundant places. [2024-11-13 14:04:29,724 INFO L231 Difference]: Finished difference. Result has 133 places, 166 transitions, 1484 flow [2024-11-13 14:04:29,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1484, PETRI_PLACES=133, PETRI_TRANSITIONS=166} [2024-11-13 14:04:29,725 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2024-11-13 14:04:29,725 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 166 transitions, 1484 flow [2024-11-13 14:04:29,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 30.25) internal successors, (484), 16 states have internal predecessors, (484), 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) [2024-11-13 14:04:29,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:29,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:29,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:04:29,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:04:29,926 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:29,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1801366363, now seen corresponding path program 1 times [2024-11-13 14:04:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:29,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931488744] [2024-11-13 14:04:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:29,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:04:30,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:30,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931488744] [2024-11-13 14:04:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931488744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:04:30,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:04:30,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:04:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842290945] [2024-11-13 14:04:30,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:30,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:04:30,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:04:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:04:30,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:04:30,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 166 transitions, 1484 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-11-13 14:04:30,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:30,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:04:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:37,556 INFO L124 PetriNetUnfolderBase]: 28468/45598 cut-off events. [2024-11-13 14:04:37,557 INFO L125 PetriNetUnfolderBase]: For 190923/194781 co-relation queries the response was YES. [2024-11-13 14:04:37,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155223 conditions, 45598 events. 28468/45598 cut-off events. For 190923/194781 co-relation queries the response was YES. Maximal size of possible extension queue 2199. Compared 386566 event pairs, 9429 based on Foata normal form. 2684/46864 useless extension candidates. Maximal degree in co-relation 152389. Up to 24930 conditions per place. [2024-11-13 14:04:37,982 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 181 selfloop transitions, 8 changer transitions 0/213 dead transitions. [2024-11-13 14:04:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 213 transitions, 2293 flow [2024-11-13 14:04:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:04:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:04:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-11-13 14:04:37,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-11-13 14:04:37,984 INFO L175 Difference]: Start difference. First operand has 133 places, 166 transitions, 1484 flow. Second operand 3 states and 127 transitions. [2024-11-13 14:04:37,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 213 transitions, 2293 flow [2024-11-13 14:04:40,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 213 transitions, 2218 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-11-13 14:04:40,202 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1489 flow [2024-11-13 14:04:40,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1489, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-11-13 14:04:40,203 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 63 predicate places. [2024-11-13 14:04:40,203 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1489 flow [2024-11-13 14:04:40,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-11-13 14:04:40,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:40,204 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:40,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 14:04:40,204 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:40,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1011604939, now seen corresponding path program 2 times [2024-11-13 14:04:40,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:40,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554076168] [2024-11-13 14:04:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:40,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:04:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:40,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554076168] [2024-11-13 14:04:40,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554076168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:04:40,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:04:40,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:04:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013356981] [2024-11-13 14:04:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:04:40,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:04:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:04:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:04:40,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 14:04:40,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1489 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-11-13 14:04:40,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:40,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 14:04:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:50,302 INFO L124 PetriNetUnfolderBase]: 37930/61694 cut-off events. [2024-11-13 14:04:50,302 INFO L125 PetriNetUnfolderBase]: For 199768/203189 co-relation queries the response was YES. [2024-11-13 14:04:50,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205675 conditions, 61694 events. 37930/61694 cut-off events. For 199768/203189 co-relation queries the response was YES. Maximal size of possible extension queue 2528. Compared 545925 event pairs, 5914 based on Foata normal form. 2591/62944 useless extension candidates. Maximal degree in co-relation 200053. Up to 28219 conditions per place. [2024-11-13 14:04:51,006 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 164 selfloop transitions, 54 changer transitions 0/242 dead transitions. [2024-11-13 14:04:51,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 242 transitions, 2412 flow [2024-11-13 14:04:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:04:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:04:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-13 14:04:51,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-11-13 14:04:51,008 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1489 flow. Second operand 4 states and 178 transitions. [2024-11-13 14:04:51,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 242 transitions, 2412 flow [2024-11-13 14:04:55,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 242 transitions, 2382 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:04:55,168 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 1911 flow [2024-11-13 14:04:55,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1911, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2024-11-13 14:04:55,169 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2024-11-13 14:04:55,169 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 1911 flow [2024-11-13 14:04:55,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-11-13 14:04:55,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:55,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:55,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 14:04:55,170 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 14:04:55,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:55,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1484617912, now seen corresponding path program 1 times [2024-11-13 14:04:55,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050330953] [2024-11-13 14:04:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:55,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:04:55,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050330953] [2024-11-13 14:04:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050330953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550698003] [2024-11-13 14:04:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:55,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:55,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d515d9b7-c421-4c18-a640-187b3fa55dbb/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:04:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:56,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 14:04:56,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:04:56,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:04:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550698003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:04:57,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:04:57,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 25 [2024-11-13 14:04:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362251822] [2024-11-13 14:04:57,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:04:57,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 14:04:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 14:04:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:04:57,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2024-11-13 14:04:57,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 1911 flow. Second operand has 26 states, 26 states have (on average 19.192307692307693) internal successors, (499), 26 states have internal predecessors, (499), 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) [2024-11-13 14:04:57,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:57,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2024-11-13 14:04:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand