./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01186d000498d57447d1d7ea86dd893215c56febea2169abeb96f12030a58ea4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:24:09,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:24:09,368 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:24:09,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:24:09,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:24:09,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:24:09,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:24:09,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:24:09,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:24:09,425 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:24:09,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:24:09,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:24:09,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:24:09,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:24:09,427 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:24:09,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:24:09,428 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:24:09,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:24:09,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:24:09,430 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:24:09,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:24:09,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:24:09,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:09,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:24:09,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:24:09,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:24:09,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:24:09,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:09,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:24:09,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:24:09,434 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_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01186d000498d57447d1d7ea86dd893215c56febea2169abeb96f12030a58ea4 [2024-11-23 18:24:09,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:24:09,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:24:09,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:24:09,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:24:09,837 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:24:09,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2024-11-23 18:24:13,059 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/data/313154efd/22ab3bd0469749a5b43f24a92239a7f6/FLAGcc926297b [2024-11-23 18:24:13,447 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:24:13,451 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2024-11-23 18:24:13,490 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/data/313154efd/22ab3bd0469749a5b43f24a92239a7f6/FLAGcc926297b [2024-11-23 18:24:13,529 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/data/313154efd/22ab3bd0469749a5b43f24a92239a7f6 [2024-11-23 18:24:13,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:24:13,535 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:24:13,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:24:13,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:24:13,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:24:13,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:13,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce1cc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13, skipping insertion in model container [2024-11-23 18:24:13,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:13,584 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:24:13,878 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:24:13,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:24:13,896 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:24:13,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:24:13,956 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:24:13,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13 WrapperNode [2024-11-23 18:24:13,958 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:24:13,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:24:13,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:24:13,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:24:13,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:13,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,043 INFO L138 Inliner]: procedures = 24, calls = 49, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 311 [2024-11-23 18:24:14,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:24:14,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:24:14,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:24:14,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:24:14,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,094 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 18:24:14,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,110 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,112 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:24:14,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:24:14,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:24:14,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:24:14,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (1/1) ... [2024-11-23 18:24:14,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:14,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:24:14,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:24:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:24:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:24:14,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:24:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:24:14,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:24:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 18:24:14,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 18:24:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:24:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:24:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:24:14,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:24:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:24:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:24:14,234 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:24:14,404 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:24:14,406 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:24:15,252 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:24:15,252 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:24:15,766 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:24:15,766 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 18:24:15,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:24:15 BoogieIcfgContainer [2024-11-23 18:24:15,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:24:15,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:24:15,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:24:15,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:24:15,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:24:13" (1/3) ... [2024-11-23 18:24:15,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5aa0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:24:15, skipping insertion in model container [2024-11-23 18:24:15,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:13" (2/3) ... [2024-11-23 18:24:15,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5aa0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:24:15, skipping insertion in model container [2024-11-23 18:24:15,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:24:15" (3/3) ... [2024-11-23 18:24:15,780 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2024-11-23 18:24:15,800 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:24:15,802 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-ring-nondet.wvr.c that has 4 procedures, 68 locations, 1 initial locations, 6 loop locations, and 22 error locations. [2024-11-23 18:24:15,802 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:24:15,963 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 18:24:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 79 transitions, 179 flow [2024-11-23 18:24:16,111 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2024-11-23 18:24:16,115 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 18:24:16,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 12/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 212 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 57. Up to 3 conditions per place. [2024-11-23 18:24:16,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 79 transitions, 179 flow [2024-11-23 18:24:16,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 168 flow [2024-11-23 18:24:16,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:24:16,167 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;@2fae27ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:24:16,167 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-23 18:24:16,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:24:16,174 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 18:24:16,174 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:24:16,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:16,175 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:24:16,175 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:16,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 951185, now seen corresponding path program 1 times [2024-11-23 18:24:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:16,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745399827] [2024-11-23 18:24:16,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:16,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:16,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745399827] [2024-11-23 18:24:16,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745399827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:16,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:24:16,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600205943] [2024-11-23 18:24:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:16,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:16,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:16,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:16,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:16,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:16,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:16,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:16,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:18,656 INFO L124 PetriNetUnfolderBase]: 5785/8876 cut-off events. [2024-11-23 18:24:18,658 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-11-23 18:24:18,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17120 conditions, 8876 events. 5785/8876 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 56126 event pairs, 5236 based on Foata normal form. 1/5244 useless extension candidates. Maximal degree in co-relation 16508. Up to 7878 conditions per place. [2024-11-23 18:24:18,763 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 47 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-11-23 18:24:18,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 248 flow [2024-11-23 18:24:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-23 18:24:18,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5063291139240507 [2024-11-23 18:24:18,786 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 168 flow. Second operand 3 states and 120 transitions. [2024-11-23 18:24:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 248 flow [2024-11-23 18:24:18,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 18:24:18,817 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 142 flow [2024-11-23 18:24:18,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-11-23 18:24:18,826 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-11-23 18:24:18,829 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 142 flow [2024-11-23 18:24:18,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:18,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:18,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:24:18,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:24:18,830 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:18,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash 951186, now seen corresponding path program 1 times [2024-11-23 18:24:18,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:18,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629134738] [2024-11-23 18:24:18,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629134738] [2024-11-23 18:24:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629134738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:19,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:24:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905608990] [2024-11-23 18:24:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:19,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:19,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:19,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:19,446 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:19,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:19,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:19,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:19,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:20,809 INFO L124 PetriNetUnfolderBase]: 5786/8879 cut-off events. [2024-11-23 18:24:20,809 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-23 18:24:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16907 conditions, 8879 events. 5786/8879 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 56191 event pairs, 5236 based on Foata normal form. 0/5243 useless extension candidates. Maximal degree in co-relation 16870. Up to 7891 conditions per place. [2024-11-23 18:24:20,909 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 51 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-11-23 18:24:20,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 258 flow [2024-11-23 18:24:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-23 18:24:20,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4430379746835443 [2024-11-23 18:24:20,915 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 142 flow. Second operand 4 states and 140 transitions. [2024-11-23 18:24:20,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 258 flow [2024-11-23 18:24:20,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:20,921 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 165 flow [2024-11-23 18:24:20,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-11-23 18:24:20,922 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-11-23 18:24:20,922 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 165 flow [2024-11-23 18:24:20,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:20,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:20,924 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 18:24:20,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:24:20,925 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:20,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash 29488816, now seen corresponding path program 1 times [2024-11-23 18:24:20,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:20,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912529688] [2024-11-23 18:24:20,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:21,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:21,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912529688] [2024-11-23 18:24:21,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912529688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:21,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:21,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017926591] [2024-11-23 18:24:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:21,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:24:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:21,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:24:21,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:24:21,499 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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) [2024-11-23 18:24:21,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:21,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:22,915 INFO L124 PetriNetUnfolderBase]: 5787/8882 cut-off events. [2024-11-23 18:24:22,915 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-23 18:24:22,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16924 conditions, 8882 events. 5787/8882 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 56215 event pairs, 5236 based on Foata normal form. 0/5245 useless extension candidates. Maximal degree in co-relation 16899. Up to 7890 conditions per place. [2024-11-23 18:24:22,977 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 51 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-23 18:24:22,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 287 flow [2024-11-23 18:24:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-23 18:24:22,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4151898734177215 [2024-11-23 18:24:22,980 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 165 flow. Second operand 5 states and 164 transitions. [2024-11-23 18:24:22,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 287 flow [2024-11-23 18:24:22,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:22,986 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 199 flow [2024-11-23 18:24:22,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-11-23 18:24:22,987 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2024-11-23 18:24:22,987 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 199 flow [2024-11-23 18:24:22,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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) [2024-11-23 18:24:22,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:22,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 18:24:22,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:24:22,989 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:22,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash 914155854, now seen corresponding path program 1 times [2024-11-23 18:24:22,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:22,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477915279] [2024-11-23 18:24:22,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:22,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477915279] [2024-11-23 18:24:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477915279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:23,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288252578] [2024-11-23 18:24:23,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:23,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:24:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:23,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:24:23,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:24:23,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:23,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:23,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:23,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:24,739 INFO L124 PetriNetUnfolderBase]: 5788/8885 cut-off events. [2024-11-23 18:24:24,740 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-23 18:24:24,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16946 conditions, 8885 events. 5788/8885 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 56197 event pairs, 5236 based on Foata normal form. 0/5249 useless extension candidates. Maximal degree in co-relation 16915. Up to 7893 conditions per place. [2024-11-23 18:24:24,794 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 52 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-23 18:24:24,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 327 flow [2024-11-23 18:24:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-23 18:24:24,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4151898734177215 [2024-11-23 18:24:24,801 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 199 flow. Second operand 5 states and 164 transitions. [2024-11-23 18:24:24,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 327 flow [2024-11-23 18:24:24,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:24,804 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 241 flow [2024-11-23 18:24:24,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-11-23 18:24:24,806 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2024-11-23 18:24:24,806 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 241 flow [2024-11-23 18:24:24,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:24,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:24,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 18:24:24,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 18:24:24,808 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:24,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 914119333, now seen corresponding path program 1 times [2024-11-23 18:24:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:24,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294217214] [2024-11-23 18:24:24,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:25,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:25,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294217214] [2024-11-23 18:24:25,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294217214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:25,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198191800] [2024-11-23 18:24:25,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:25,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:25,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:25,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:25,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:24:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:25,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:24:25,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:25,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 18:24:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:25,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:25,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198191800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:25,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:25,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 18:24:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91036480] [2024-11-23 18:24:25,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:25,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:24:25,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:25,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:24:25,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:24:26,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:26,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:26,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:26,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:26,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:27,709 INFO L124 PetriNetUnfolderBase]: 5789/8887 cut-off events. [2024-11-23 18:24:27,710 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-23 18:24:27,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 8887 events. 5789/8887 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 56244 event pairs, 5236 based on Foata normal form. 0/5254 useless extension candidates. Maximal degree in co-relation 16930. Up to 7894 conditions per place. [2024-11-23 18:24:27,801 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 53 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-11-23 18:24:27,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 378 flow [2024-11-23 18:24:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:24:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:24:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-11-23 18:24:27,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35917721518987344 [2024-11-23 18:24:27,808 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 241 flow. Second operand 8 states and 227 transitions. [2024-11-23 18:24:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 378 flow [2024-11-23 18:24:27,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:27,815 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 265 flow [2024-11-23 18:24:27,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-11-23 18:24:27,817 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 8 predicate places. [2024-11-23 18:24:27,817 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 265 flow [2024-11-23 18:24:27,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:27,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:27,817 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 18:24:27,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:24:28,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:28,019 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:28,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987613, now seen corresponding path program 1 times [2024-11-23 18:24:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505838270] [2024-11-23 18:24:28,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:28,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505838270] [2024-11-23 18:24:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505838270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:28,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314137118] [2024-11-23 18:24:28,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:28,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:28,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:24:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:28,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:24:28,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:28,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 18:24:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:29,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314137118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:29,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:24:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138551386] [2024-11-23 18:24:29,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:29,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:24:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:29,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:24:29,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:24:29,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:29,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 265 flow. Second operand has 13 states, 13 states have (on average 22.307692307692307) internal successors, (290), 13 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:29,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:29,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:29,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:31,510 INFO L124 PetriNetUnfolderBase]: 5790/8889 cut-off events. [2024-11-23 18:24:31,510 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-23 18:24:31,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16987 conditions, 8889 events. 5790/8889 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 56308 event pairs, 5236 based on Foata normal form. 0/5257 useless extension candidates. Maximal degree in co-relation 16936. Up to 7886 conditions per place. [2024-11-23 18:24:31,582 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 47 selfloop transitions, 18 changer transitions 0/79 dead transitions. [2024-11-23 18:24:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 405 flow [2024-11-23 18:24:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:24:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:24:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-23 18:24:31,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3558368495077356 [2024-11-23 18:24:31,585 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 265 flow. Second operand 9 states and 253 transitions. [2024-11-23 18:24:31,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 405 flow [2024-11-23 18:24:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 358 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-23 18:24:31,591 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 264 flow [2024-11-23 18:24:31,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-11-23 18:24:31,592 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2024-11-23 18:24:31,595 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 264 flow [2024-11-23 18:24:31,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.307692307692307) internal successors, (290), 13 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:31,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:31,596 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-23 18:24:31,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:24:31,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 18:24:31,796 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:31,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1964489435, now seen corresponding path program 1 times [2024-11-23 18:24:31,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:31,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108359153] [2024-11-23 18:24:31,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:31,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108359153] [2024-11-23 18:24:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108359153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777123928] [2024-11-23 18:24:32,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:32,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:32,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:24:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:32,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:24:32,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:32,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 18:24:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:32,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:32,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777123928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:32,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:32,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:24:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436595243] [2024-11-23 18:24:32,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:32,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:24:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:32,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:24:32,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:24:33,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:33,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 264 flow. Second operand has 13 states, 13 states have (on average 22.46153846153846) internal successors, (292), 13 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:33,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:33,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:33,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:34,448 INFO L124 PetriNetUnfolderBase]: 5791/8891 cut-off events. [2024-11-23 18:24:34,448 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-23 18:24:34,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16985 conditions, 8891 events. 5791/8891 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 56310 event pairs, 5236 based on Foata normal form. 0/5259 useless extension candidates. Maximal degree in co-relation 16921. Up to 7888 conditions per place. [2024-11-23 18:24:34,505 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 45 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2024-11-23 18:24:34,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 406 flow [2024-11-23 18:24:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:24:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:24:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-11-23 18:24:34,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35443037974683544 [2024-11-23 18:24:34,508 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 264 flow. Second operand 9 states and 252 transitions. [2024-11-23 18:24:34,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 406 flow [2024-11-23 18:24:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 373 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-23 18:24:34,511 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 283 flow [2024-11-23 18:24:34,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-23 18:24:34,512 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-23 18:24:34,513 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 283 flow [2024-11-23 18:24:34,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.46153846153846) internal successors, (292), 13 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:34,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:34,513 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:34,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:24:34,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:34,714 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:34,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash -766914087, now seen corresponding path program 1 times [2024-11-23 18:24:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:34,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050941905] [2024-11-23 18:24:34,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:34,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:34,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:34,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050941905] [2024-11-23 18:24:34,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050941905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:34,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:34,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:24:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175546524] [2024-11-23 18:24:34,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:34,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:34,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:34,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:34,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:34,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:34,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:34,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:34,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:35,840 INFO L124 PetriNetUnfolderBase]: 5995/9258 cut-off events. [2024-11-23 18:24:35,840 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-23 18:24:35,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17731 conditions, 9258 events. 5995/9258 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 58574 event pairs, 5423 based on Foata normal form. 102/5664 useless extension candidates. Maximal degree in co-relation 16931. Up to 7902 conditions per place. [2024-11-23 18:24:35,866 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 98 selfloop transitions, 3 changer transitions 1/116 dead transitions. [2024-11-23 18:24:35,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 116 transitions, 628 flow [2024-11-23 18:24:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-23 18:24:35,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632911392405063 [2024-11-23 18:24:35,867 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 283 flow. Second operand 4 states and 178 transitions. [2024-11-23 18:24:35,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 116 transitions, 628 flow [2024-11-23 18:24:35,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 550 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-23 18:24:35,871 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 258 flow [2024-11-23 18:24:35,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2024-11-23 18:24:35,871 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2024-11-23 18:24:35,872 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 258 flow [2024-11-23 18:24:35,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:35,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:35,872 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:35,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 18:24:35,872 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:35,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1705611610, now seen corresponding path program 1 times [2024-11-23 18:24:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:35,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063714287] [2024-11-23 18:24:35,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:36,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:36,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063714287] [2024-11-23 18:24:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063714287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:36,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:24:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386851761] [2024-11-23 18:24:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:36,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:24:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:36,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:24:36,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:24:36,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 79 [2024-11-23 18:24:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 79 [2024-11-23 18:24:36,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:37,157 INFO L124 PetriNetUnfolderBase]: 4530/7093 cut-off events. [2024-11-23 18:24:37,158 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2024-11-23 18:24:37,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13780 conditions, 7093 events. 4530/7093 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41876 event pairs, 3896 based on Foata normal form. 0/4896 useless extension candidates. Maximal degree in co-relation 13033. Up to 5981 conditions per place. [2024-11-23 18:24:37,187 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 60 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-11-23 18:24:37,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 368 flow [2024-11-23 18:24:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-23 18:24:37,189 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40189873417721517 [2024-11-23 18:24:37,189 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 258 flow. Second operand 4 states and 127 transitions. [2024-11-23 18:24:37,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 368 flow [2024-11-23 18:24:37,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:37,193 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 243 flow [2024-11-23 18:24:37,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-11-23 18:24:37,194 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2024-11-23 18:24:37,194 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 243 flow [2024-11-23 18:24:37,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:37,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:37,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:37,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:24:37,195 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:37,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:37,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1931618542, now seen corresponding path program 1 times [2024-11-23 18:24:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:37,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732598591] [2024-11-23 18:24:37,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:37,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:37,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732598591] [2024-11-23 18:24:37,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732598591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:37,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:37,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:24:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962147814] [2024-11-23 18:24:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:37,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:37,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:37,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:37,288 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:37,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:37,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:37,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:37,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:37,875 INFO L124 PetriNetUnfolderBase]: 3592/5651 cut-off events. [2024-11-23 18:24:37,876 INFO L125 PetriNetUnfolderBase]: For 577/577 co-relation queries the response was YES. [2024-11-23 18:24:37,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11434 conditions, 5651 events. 3592/5651 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33781 event pairs, 1296 based on Foata normal form. 127/3956 useless extension candidates. Maximal degree in co-relation 11147. Up to 3903 conditions per place. [2024-11-23 18:24:37,906 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 80 selfloop transitions, 2 changer transitions 1/96 dead transitions. [2024-11-23 18:24:37,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 457 flow [2024-11-23 18:24:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-23 18:24:37,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5907172995780591 [2024-11-23 18:24:37,908 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 243 flow. Second operand 3 states and 140 transitions. [2024-11-23 18:24:37,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 457 flow [2024-11-23 18:24:37,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:37,911 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 248 flow [2024-11-23 18:24:37,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2024-11-23 18:24:37,912 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2024-11-23 18:24:37,913 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 248 flow [2024-11-23 18:24:37,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:37,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:37,913 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:37,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 18:24:37,914 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:37,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1334352413, now seen corresponding path program 1 times [2024-11-23 18:24:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:37,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891873770] [2024-11-23 18:24:37,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891873770] [2024-11-23 18:24:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891873770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:24:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213167674] [2024-11-23 18:24:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:38,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:24:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:38,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:24:38,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 18:24:38,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 79 [2024-11-23 18:24:38,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:38,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:38,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 79 [2024-11-23 18:24:38,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:39,317 INFO L124 PetriNetUnfolderBase]: 4309/6877 cut-off events. [2024-11-23 18:24:39,318 INFO L125 PetriNetUnfolderBase]: For 1136/1208 co-relation queries the response was YES. [2024-11-23 18:24:39,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14820 conditions, 6877 events. 4309/6877 cut-off events. For 1136/1208 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43948 event pairs, 1630 based on Foata normal form. 0/5258 useless extension candidates. Maximal degree in co-relation 14778. Up to 3267 conditions per place. [2024-11-23 18:24:39,348 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 81 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-23 18:24:39,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 485 flow [2024-11-23 18:24:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-23 18:24:39,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40253164556962023 [2024-11-23 18:24:39,350 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 248 flow. Second operand 5 states and 159 transitions. [2024-11-23 18:24:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 485 flow [2024-11-23 18:24:39,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:39,353 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 276 flow [2024-11-23 18:24:39,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-11-23 18:24:39,354 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2024-11-23 18:24:39,354 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 276 flow [2024-11-23 18:24:39,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:39,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:39,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:39,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 18:24:39,354 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:39,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1579731297, now seen corresponding path program 1 times [2024-11-23 18:24:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:39,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334885606] [2024-11-23 18:24:39,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:39,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334885606] [2024-11-23 18:24:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334885606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:39,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:39,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725667091] [2024-11-23 18:24:39,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:39,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:39,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:39,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:39,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:39,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:39,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:39,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:40,208 INFO L124 PetriNetUnfolderBase]: 4243/6519 cut-off events. [2024-11-23 18:24:40,208 INFO L125 PetriNetUnfolderBase]: For 3842/3866 co-relation queries the response was YES. [2024-11-23 18:24:40,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15461 conditions, 6519 events. 4243/6519 cut-off events. For 3842/3866 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 38218 event pairs, 1943 based on Foata normal form. 60/5006 useless extension candidates. Maximal degree in co-relation 15414. Up to 5410 conditions per place. [2024-11-23 18:24:40,247 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 79 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-23 18:24:40,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 504 flow [2024-11-23 18:24:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-11-23 18:24:40,249 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5654008438818565 [2024-11-23 18:24:40,249 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 276 flow. Second operand 3 states and 134 transitions. [2024-11-23 18:24:40,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 504 flow [2024-11-23 18:24:40,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:40,254 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 312 flow [2024-11-23 18:24:40,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-11-23 18:24:40,255 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 8 predicate places. [2024-11-23 18:24:40,256 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 312 flow [2024-11-23 18:24:40,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:40,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:40,256 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:40,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 18:24:40,256 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:40,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1769506514, now seen corresponding path program 1 times [2024-11-23 18:24:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:40,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228480172] [2024-11-23 18:24:40,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:40,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228480172] [2024-11-23 18:24:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228480172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334145503] [2024-11-23 18:24:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:40,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:40,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:40,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:40,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:40,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:40,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:40,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:40,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:41,352 INFO L124 PetriNetUnfolderBase]: 6259/9574 cut-off events. [2024-11-23 18:24:41,352 INFO L125 PetriNetUnfolderBase]: For 9058/9094 co-relation queries the response was YES. [2024-11-23 18:24:41,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24622 conditions, 9574 events. 6259/9574 cut-off events. For 9058/9094 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59430 event pairs, 4579 based on Foata normal form. 191/7568 useless extension candidates. Maximal degree in co-relation 24574. Up to 5795 conditions per place. [2024-11-23 18:24:41,413 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 95 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-23 18:24:41,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 648 flow [2024-11-23 18:24:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-11-23 18:24:41,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5569620253164557 [2024-11-23 18:24:41,415 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 312 flow. Second operand 4 states and 176 transitions. [2024-11-23 18:24:41,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 648 flow [2024-11-23 18:24:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 641 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:41,422 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 331 flow [2024-11-23 18:24:41,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2024-11-23 18:24:41,423 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2024-11-23 18:24:41,423 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 331 flow [2024-11-23 18:24:41,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:41,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:41,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:41,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 18:24:41,424 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:41,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1815202284, now seen corresponding path program 1 times [2024-11-23 18:24:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:41,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063788422] [2024-11-23 18:24:41,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:41,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:41,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:41,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063788422] [2024-11-23 18:24:41,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063788422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:41,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:41,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57358679] [2024-11-23 18:24:41,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:41,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:41,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:41,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:41,574 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:41,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 331 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) [2024-11-23 18:24:41,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:41,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:42,679 INFO L124 PetriNetUnfolderBase]: 7412/11579 cut-off events. [2024-11-23 18:24:42,679 INFO L125 PetriNetUnfolderBase]: For 11161/11233 co-relation queries the response was YES. [2024-11-23 18:24:42,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30625 conditions, 11579 events. 7412/11579 cut-off events. For 11161/11233 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 74463 event pairs, 5463 based on Foata normal form. 236/9393 useless extension candidates. Maximal degree in co-relation 30576. Up to 8677 conditions per place. [2024-11-23 18:24:42,733 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 90 selfloop transitions, 5 changer transitions 8/115 dead transitions. [2024-11-23 18:24:42,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 691 flow [2024-11-23 18:24:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 198 transitions. [2024-11-23 18:24:42,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012658227848101 [2024-11-23 18:24:42,735 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 331 flow. Second operand 5 states and 198 transitions. [2024-11-23 18:24:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 691 flow [2024-11-23 18:24:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 115 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:42,742 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 355 flow [2024-11-23 18:24:42,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-11-23 18:24:42,744 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2024-11-23 18:24:42,744 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 355 flow [2024-11-23 18:24:42,744 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) [2024-11-23 18:24:42,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:42,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:42,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 18:24:42,744 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:42,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2136338889, now seen corresponding path program 1 times [2024-11-23 18:24:42,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:42,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234692452] [2024-11-23 18:24:42,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:42,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234692452] [2024-11-23 18:24:42,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234692452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710077422] [2024-11-23 18:24:42,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:42,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:24:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:43,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:24:43,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:43,204 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:24:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710077422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:43,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:24:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 18:24:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594476462] [2024-11-23 18:24:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:43,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:24:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:43,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:24:43,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:24:43,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:43,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:43,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:43,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:43,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:44,271 INFO L124 PetriNetUnfolderBase]: 6246/9706 cut-off events. [2024-11-23 18:24:44,271 INFO L125 PetriNetUnfolderBase]: For 10020/10092 co-relation queries the response was YES. [2024-11-23 18:24:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26592 conditions, 9706 events. 6246/9706 cut-off events. For 10020/10092 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 60577 event pairs, 4516 based on Foata normal form. 0/7758 useless extension candidates. Maximal degree in co-relation 26539. Up to 8718 conditions per place. [2024-11-23 18:24:44,320 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 61 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2024-11-23 18:24:44,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 79 transitions, 481 flow [2024-11-23 18:24:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-23 18:24:44,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4462025316455696 [2024-11-23 18:24:44,322 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 355 flow. Second operand 4 states and 141 transitions. [2024-11-23 18:24:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 79 transitions, 481 flow [2024-11-23 18:24:44,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 79 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:44,328 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 356 flow [2024-11-23 18:24:44,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2024-11-23 18:24:44,329 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2024-11-23 18:24:44,329 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 356 flow [2024-11-23 18:24:44,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:44,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:44,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:44,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:24:44,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 18:24:44,530 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:44,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2136338890, now seen corresponding path program 1 times [2024-11-23 18:24:44,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:44,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850816260] [2024-11-23 18:24:44,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:44,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850816260] [2024-11-23 18:24:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850816260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:44,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88880785] [2024-11-23 18:24:44,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:44,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:44,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:44,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:44,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:44,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:44,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:44,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:44,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:45,388 INFO L124 PetriNetUnfolderBase]: 5616/8772 cut-off events. [2024-11-23 18:24:45,388 INFO L125 PetriNetUnfolderBase]: For 9456/9528 co-relation queries the response was YES. [2024-11-23 18:24:45,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 8772 events. 5616/8772 cut-off events. For 9456/9528 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 54087 event pairs, 3993 based on Foata normal form. 0/7207 useless extension candidates. Maximal degree in co-relation 23976. Up to 7832 conditions per place. [2024-11-23 18:24:45,423 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 59 selfloop transitions, 4 changer transitions 2/77 dead transitions. [2024-11-23 18:24:45,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 77 transitions, 478 flow [2024-11-23 18:24:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-23 18:24:45,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40189873417721517 [2024-11-23 18:24:45,425 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 356 flow. Second operand 4 states and 127 transitions. [2024-11-23 18:24:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 77 transitions, 478 flow [2024-11-23 18:24:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 77 transitions, 469 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:45,431 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 329 flow [2024-11-23 18:24:45,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=329, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-11-23 18:24:45,432 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 15 predicate places. [2024-11-23 18:24:45,432 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 329 flow [2024-11-23 18:24:45,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:45,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:45,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:45,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 18:24:45,433 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:45,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:45,433 INFO L85 PathProgramCache]: Analyzing trace with hash 608725121, now seen corresponding path program 1 times [2024-11-23 18:24:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:45,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791134175] [2024-11-23 18:24:45,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:45,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:45,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:45,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791134175] [2024-11-23 18:24:45,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791134175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:45,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:45,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:45,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294684410] [2024-11-23 18:24:45,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:45,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:45,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:45,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:45,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:45,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:45,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:45,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:45,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:46,223 INFO L124 PetriNetUnfolderBase]: 3722/5947 cut-off events. [2024-11-23 18:24:46,223 INFO L125 PetriNetUnfolderBase]: For 6407/6455 co-relation queries the response was YES. [2024-11-23 18:24:46,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16047 conditions, 5947 events. 3722/5947 cut-off events. For 6407/6455 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 35672 event pairs, 2600 based on Foata normal form. 0/5191 useless extension candidates. Maximal degree in co-relation 15993. Up to 5171 conditions per place. [2024-11-23 18:24:46,262 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 55 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-23 18:24:46,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 443 flow [2024-11-23 18:24:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-11-23 18:24:46,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.369620253164557 [2024-11-23 18:24:46,264 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 329 flow. Second operand 5 states and 146 transitions. [2024-11-23 18:24:46,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 443 flow [2024-11-23 18:24:46,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 430 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-23 18:24:46,274 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 320 flow [2024-11-23 18:24:46,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-11-23 18:24:46,275 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2024-11-23 18:24:46,275 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 320 flow [2024-11-23 18:24:46,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:46,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:46,276 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:46,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 18:24:46,276 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:46,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash 608725122, now seen corresponding path program 1 times [2024-11-23 18:24:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:46,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322330487] [2024-11-23 18:24:46,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:46,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:46,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322330487] [2024-11-23 18:24:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322330487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510805997] [2024-11-23 18:24:46,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:46,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:24:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:46,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 18:24:46,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:46,661 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 [2024-11-23 18:24:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:24:46,741 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 [2024-11-23 18:24:46,763 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 18:24:46,763 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 [2024-11-23 18:24:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:24:46,834 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:24:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510805997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:46,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:24:46,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 18:24:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810453274] [2024-11-23 18:24:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:46,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:24:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:46,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:24:46,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:24:46,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-23 18:24:46,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:46,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:46,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-23 18:24:46,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:47,310 INFO L124 PetriNetUnfolderBase]: 2594/4337 cut-off events. [2024-11-23 18:24:47,310 INFO L125 PetriNetUnfolderBase]: For 4401/4449 co-relation queries the response was YES. [2024-11-23 18:24:47,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11328 conditions, 4337 events. 2594/4337 cut-off events. For 4401/4449 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 25781 event pairs, 1771 based on Foata normal form. 286/4146 useless extension candidates. Maximal degree in co-relation 11276. Up to 3638 conditions per place. [2024-11-23 18:24:47,323 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 54 selfloop transitions, 4 changer transitions 1/71 dead transitions. [2024-11-23 18:24:47,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 432 flow [2024-11-23 18:24:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-23 18:24:47,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38924050632911394 [2024-11-23 18:24:47,325 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 320 flow. Second operand 4 states and 123 transitions. [2024-11-23 18:24:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 432 flow [2024-11-23 18:24:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 71 transitions, 423 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:24:47,327 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 304 flow [2024-11-23 18:24:47,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2024-11-23 18:24:47,328 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-23 18:24:47,328 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 304 flow [2024-11-23 18:24:47,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:47,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:47,328 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:47,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:24:47,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:24:47,531 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:47,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1652539322, now seen corresponding path program 1 times [2024-11-23 18:24:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652233733] [2024-11-23 18:24:47,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:24:47,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:47,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652233733] [2024-11-23 18:24:47,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652233733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:47,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:47,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113639459] [2024-11-23 18:24:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:47,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:47,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:47,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:47,612 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:47,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:47,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:47,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:47,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:48,173 INFO L124 PetriNetUnfolderBase]: 2862/4817 cut-off events. [2024-11-23 18:24:48,173 INFO L125 PetriNetUnfolderBase]: For 4475/4499 co-relation queries the response was YES. [2024-11-23 18:24:48,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 4817 events. 2862/4817 cut-off events. For 4475/4499 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 28814 event pairs, 1092 based on Foata normal form. 1/4342 useless extension candidates. Maximal degree in co-relation 12225. Up to 2024 conditions per place. [2024-11-23 18:24:48,195 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 77 selfloop transitions, 2 changer transitions 8/99 dead transitions. [2024-11-23 18:24:48,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 599 flow [2024-11-23 18:24:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-11-23 18:24:48,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5654008438818565 [2024-11-23 18:24:48,196 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 304 flow. Second operand 3 states and 134 transitions. [2024-11-23 18:24:48,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 599 flow [2024-11-23 18:24:48,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 593 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:48,201 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 304 flow [2024-11-23 18:24:48,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2024-11-23 18:24:48,202 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-23 18:24:48,202 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 304 flow [2024-11-23 18:24:48,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:48,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:48,203 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:48,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-23 18:24:48,203 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:48,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1351843781, now seen corresponding path program 1 times [2024-11-23 18:24:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14725166] [2024-11-23 18:24:48,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:24:48,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14725166] [2024-11-23 18:24:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14725166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:48,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:48,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248898878] [2024-11-23 18:24:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:48,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:48,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:48,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:48,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-11-23 18:24:48,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:48,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:48,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-11-23 18:24:48,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:48,882 INFO L124 PetriNetUnfolderBase]: 2406/4347 cut-off events. [2024-11-23 18:24:48,882 INFO L125 PetriNetUnfolderBase]: For 3565/3579 co-relation queries the response was YES. [2024-11-23 18:24:48,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10693 conditions, 4347 events. 2406/4347 cut-off events. For 3565/3579 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 27616 event pairs, 945 based on Foata normal form. 140/4055 useless extension candidates. Maximal degree in co-relation 10640. Up to 1678 conditions per place. [2024-11-23 18:24:48,910 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 67 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-11-23 18:24:48,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 466 flow [2024-11-23 18:24:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-23 18:24:48,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5232067510548524 [2024-11-23 18:24:48,911 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 304 flow. Second operand 3 states and 124 transitions. [2024-11-23 18:24:48,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 466 flow [2024-11-23 18:24:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 459 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:48,916 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 288 flow [2024-11-23 18:24:48,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-11-23 18:24:48,917 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2024-11-23 18:24:48,917 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 288 flow [2024-11-23 18:24:48,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:48,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:48,917 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:48,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 18:24:48,918 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-23 18:24:48,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -158741908, now seen corresponding path program 1 times [2024-11-23 18:24:48,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:48,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120532264] [2024-11-23 18:24:48,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:48,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:24:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120532264] [2024-11-23 18:24:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120532264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256170005] [2024-11-23 18:24:49,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:49,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:49,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:24:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:49,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:24:49,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:49,209 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 24 treesize of output 8 [2024-11-23 18:24:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:24:49,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:24:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256170005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:49,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-23 18:24:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576683332] [2024-11-23 18:24:49,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:49,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:24:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:49,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:24:49,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:24:49,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 79 [2024-11-23 18:24:49,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:49,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:49,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 79 [2024-11-23 18:24:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:49,872 INFO L124 PetriNetUnfolderBase]: 2222/3940 cut-off events. [2024-11-23 18:24:49,872 INFO L125 PetriNetUnfolderBase]: For 3317/3317 co-relation queries the response was YES. [2024-11-23 18:24:49,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 3940 events. 2222/3940 cut-off events. For 3317/3317 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24125 event pairs, 722 based on Foata normal form. 0/3621 useless extension candidates. Maximal degree in co-relation 9466. Up to 1314 conditions per place. [2024-11-23 18:24:49,882 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 0 selfloop transitions, 0 changer transitions 110/110 dead transitions. [2024-11-23 18:24:49,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 612 flow [2024-11-23 18:24:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-11-23 18:24:49,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4936708860759494 [2024-11-23 18:24:49,884 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 288 flow. Second operand 5 states and 195 transitions. [2024-11-23 18:24:49,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 612 flow [2024-11-23 18:24:49,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 603 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:24:49,888 INFO L231 Difference]: Finished difference. Result has 82 places, 0 transitions, 0 flow [2024-11-23 18:24:49,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=82, PETRI_TRANSITIONS=0} [2024-11-23 18:24:49,889 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-11-23 18:24:49,889 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 0 transitions, 0 flow [2024-11-23 18:24:49,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:49,893 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-23 18:24:49,894 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-23 18:24:49,895 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (18 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 39 remaining) [2024-11-23 18:24:49,896 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-23 18:24:49,897 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-23 18:24:49,898 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2024-11-23 18:24:49,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:24:50,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:50,099 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:50,106 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-23 18:24:50,106 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-23 18:24:50,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 06:24:50 BasicIcfg [2024-11-23 18:24:50,113 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-23 18:24:50,114 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-23 18:24:50,114 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-23 18:24:50,114 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-23 18:24:50,115 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:24:15" (3/4) ... [2024-11-23 18:24:50,117 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-23 18:24:50,121 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-23 18:24:50,121 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-23 18:24:50,121 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2024-11-23 18:24:50,136 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 187 nodes and edges [2024-11-23 18:24:50,137 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2024-11-23 18:24:50,137 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2024-11-23 18:24:50,141 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-23 18:24:50,250 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/witness.graphml [2024-11-23 18:24:50,251 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/witness.yml [2024-11-23 18:24:50,251 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-23 18:24:50,253 INFO L158 Benchmark]: Toolchain (without parser) took 36717.68ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 93.9MB in the beginning and 978.1MB in the end (delta: -884.1MB). Peak memory consumption was 250.4MB. Max. memory is 16.1GB. [2024-11-23 18:24:50,254 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:24:50,255 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.84ms. Allocated memory is still 117.4MB. Free memory was 93.6MB in the beginning and 80.6MB in the end (delta: 13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:24:50,255 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.02ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 78.5MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:24:50,256 INFO L158 Benchmark]: Boogie Preprocessor took 80.38ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 75.4MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:24:50,256 INFO L158 Benchmark]: RCFGBuilder took 1640.93ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 75.4MB in the beginning and 318.3MB in the end (delta: -242.8MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. [2024-11-23 18:24:50,257 INFO L158 Benchmark]: TraceAbstraction took 34342.56ms. Allocated memory was 352.3MB in the beginning and 1.3GB in the end (delta: 906.0MB). Free memory was 317.6MB in the beginning and 984.2MB in the end (delta: -666.6MB). Peak memory consumption was 827.8MB. Max. memory is 16.1GB. [2024-11-23 18:24:50,257 INFO L158 Benchmark]: Witness Printer took 137.44ms. Allocated memory is still 1.3GB. Free memory was 984.2MB in the beginning and 978.1MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:24:50,259 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.84ms. Allocated memory is still 117.4MB. Free memory was 93.6MB in the beginning and 80.6MB in the end (delta: 13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.02ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 78.5MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.38ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 75.4MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1640.93ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 75.4MB in the beginning and 318.3MB in the end (delta: -242.8MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. * TraceAbstraction took 34342.56ms. Allocated memory was 352.3MB in the beginning and 1.3GB in the end (delta: 906.0MB). Free memory was 317.6MB in the beginning and 984.2MB in the end (delta: -666.6MB). Peak memory consumption was 827.8MB. Max. memory is 16.1GB. * Witness Printer took 137.44ms. Allocated memory is still 1.3GB. Free memory was 984.2MB in the beginning and 978.1MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 123]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 111 locations, 39 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 34.1s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1344 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1155 mSDsluCounter, 71 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3902 IncrementalHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 17 mSDtfsCounter, 3902 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=356occurred in iteration=15, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 412 NumberOfCodeBlocks, 412 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 449 ConstructedInterpolants, 5 QuantifiedInterpolants, 2965 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1145 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 31 InterpolantComputations, 17 PerfectInterpolantSequences, 130/153 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 22 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-23 18:24:50,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36864e4-a0cf-4dd9-9e3a-724c88a95a21/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE